./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72aca9735a0330ad4ed4e9de4f21904354ce62c742d488d0b09ce6da875c2798 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:48:01,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:48:01,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:48:01,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:48:02,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:48:02,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:48:02,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:48:02,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:48:02,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:48:02,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:48:02,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:48:02,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:48:02,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:48:02,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:48:02,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:48:02,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:48:02,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:48:02,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:48:02,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:48:02,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:48:02,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:48:02,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:48:02,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:48:02,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:48:02,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:48:02,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:48:02,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:48:02,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:48:02,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:48:02,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:48:02,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:48:02,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:48:02,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:48:02,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:48:02,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:48:02,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:48:02,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:48:02,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:48:02,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:48:02,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:48:02,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:48:02,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:48:02,134 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:48:02,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:48:02,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:48:02,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:48:02,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:48:02,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:48:02,137 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:48:02,138 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:48:02,138 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:48:02,138 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:48:02,139 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:48:02,139 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:48:02,140 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:48:02,140 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:48:02,140 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:48:02,140 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:48:02,140 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:48:02,141 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:48:02,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:48:02,142 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:48:02,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:48:02,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:48:02,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:48:02,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:48:02,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:48:02,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:48:02,145 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:48:02,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:48:02,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:48:02,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:48:02,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:48:02,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:48:02,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:48:02,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:48:02,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:48:02,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:48:02,147 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:48:02,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:48:02,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:48:02,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:48:02,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:48:02,148 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72aca9735a0330ad4ed4e9de4f21904354ce62c742d488d0b09ce6da875c2798 [2021-11-23 16:48:02,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:48:02,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:48:02,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:48:02,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:48:02,585 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:48:02,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-23 16:48:02,675 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/data/d7512d027/6d0ac5022f244b20ac422f7ead11c8d0/FLAG7d0b57370 [2021-11-23 16:48:03,502 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:48:03,503 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-23 16:48:03,545 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/data/d7512d027/6d0ac5022f244b20ac422f7ead11c8d0/FLAG7d0b57370 [2021-11-23 16:48:03,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/data/d7512d027/6d0ac5022f244b20ac422f7ead11c8d0 [2021-11-23 16:48:03,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:48:03,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:48:03,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:48:03,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:48:03,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:48:03,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:48:03" (1/1) ... [2021-11-23 16:48:03,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c02d171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:03, skipping insertion in model container [2021-11-23 16:48:03,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:48:03" (1/1) ... [2021-11-23 16:48:03,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:48:03,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:48:04,187 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[8448,8461] [2021-11-23 16:48:04,258 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[12616,12629] [2021-11-23 16:48:04,348 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[20366,20379] [2021-11-23 16:48:04,408 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[27098,27111] [2021-11-23 16:48:04,550 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[47963,47976] [2021-11-23 16:48:04,626 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[73065,73078] [2021-11-23 16:48:04,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:48:04,959 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:48:05,030 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[8448,8461] [2021-11-23 16:48:05,066 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[12616,12629] [2021-11-23 16:48:05,145 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[20366,20379] [2021-11-23 16:48:05,170 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[27098,27111] [2021-11-23 16:48:05,236 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[47963,47976] [2021-11-23 16:48:05,311 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[73065,73078] [2021-11-23 16:48:05,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:48:05,504 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:48:05,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05 WrapperNode [2021-11-23 16:48:05,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:48:05,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:48:05,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:48:05,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:48:05,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05" (1/1) ... [2021-11-23 16:48:05,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05" (1/1) ... [2021-11-23 16:48:05,782 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5697 [2021-11-23 16:48:05,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:48:05,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:48:05,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:48:05,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:48:05,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05" (1/1) ... [2021-11-23 16:48:05,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05" (1/1) ... [2021-11-23 16:48:05,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05" (1/1) ... [2021-11-23 16:48:05,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05" (1/1) ... [2021-11-23 16:48:05,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05" (1/1) ... [2021-11-23 16:48:06,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05" (1/1) ... [2021-11-23 16:48:06,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05" (1/1) ... [2021-11-23 16:48:06,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:48:06,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:48:06,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:48:06,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:48:06,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:05" (1/1) ... [2021-11-23 16:48:06,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:48:06,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:48:06,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:48:06,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:48:06,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:48:06,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:48:06,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:48:06,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:48:06,531 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:48:06,546 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:48:09,332 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:48:09,431 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:48:09,438 INFO L158 Benchmark]: Toolchain (without parser) took 5852.65ms. Allocated memory was 98.6MB in the beginning and 213.9MB in the end (delta: 115.3MB). Free memory was 72.0MB in the beginning and 118.1MB in the end (delta: -46.1MB). Peak memory consumption was 111.2MB. Max. memory is 16.1GB. [2021-11-23 16:48:09,439 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 73.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:48:09,441 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1919.50ms. Allocated memory was 98.6MB in the beginning and 136.3MB in the end (delta: 37.7MB). Free memory was 72.0MB in the beginning and 71.8MB in the end (delta: 210.2kB). Peak memory consumption was 47.1MB. Max. memory is 16.1GB. [2021-11-23 16:48:09,442 INFO L158 Benchmark]: Boogie Procedure Inliner took 276.84ms. Allocated memory is still 136.3MB. Free memory was 71.8MB in the beginning and 88.5MB in the end (delta: -16.7MB). Peak memory consumption was 16.1MB. Max. memory is 16.1GB. [2021-11-23 16:48:09,444 INFO L158 Benchmark]: Boogie Preprocessor took 314.22ms. Allocated memory is still 136.3MB. Free memory was 88.5MB in the beginning and 74.3MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 16:48:09,445 INFO L158 Benchmark]: RCFGBuilder took 3334.33ms. Allocated memory was 136.3MB in the beginning and 213.9MB in the end (delta: 77.6MB). Free memory was 74.3MB in the beginning and 118.1MB in the end (delta: -43.8MB). Peak memory consumption was 75.2MB. Max. memory is 16.1GB. [2021-11-23 16:48:09,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 73.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1919.50ms. Allocated memory was 98.6MB in the beginning and 136.3MB in the end (delta: 37.7MB). Free memory was 72.0MB in the beginning and 71.8MB in the end (delta: 210.2kB). Peak memory consumption was 47.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 276.84ms. Allocated memory is still 136.3MB. Free memory was 71.8MB in the beginning and 88.5MB in the end (delta: -16.7MB). Peak memory consumption was 16.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 314.22ms. Allocated memory is still 136.3MB. Free memory was 88.5MB in the beginning and 74.3MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * RCFGBuilder took 3334.33ms. Allocated memory was 136.3MB in the beginning and 213.9MB in the end (delta: 77.6MB). Free memory was 74.3MB in the beginning and 118.1MB in the end (delta: -43.8MB). Peak memory consumption was 75.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:48:09,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72aca9735a0330ad4ed4e9de4f21904354ce62c742d488d0b09ce6da875c2798 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:48:12,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:48:12,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:48:12,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:48:12,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:48:12,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:48:12,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:48:12,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:48:12,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:48:12,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:48:12,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:48:12,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:48:12,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:48:12,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:48:12,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:48:12,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:48:12,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:48:12,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:48:12,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:48:12,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:48:12,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:48:12,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:48:12,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:48:12,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:48:12,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:48:12,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:48:12,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:48:12,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:48:12,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:48:12,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:48:12,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:48:12,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:48:12,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:48:12,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:48:12,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:48:12,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:48:12,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:48:12,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:48:12,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:48:12,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:48:12,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:48:12,234 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:48:12,280 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:48:12,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:48:12,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:48:12,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:48:12,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:48:12,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:48:12,284 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:48:12,284 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:48:12,284 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:48:12,285 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:48:12,286 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:48:12,287 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:48:12,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:48:12,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:48:12,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:48:12,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:48:12,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:48:12,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:48:12,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:48:12,291 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:48:12,291 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:48:12,291 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:48:12,292 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:48:12,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:48:12,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:48:12,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:48:12,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:48:12,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:48:12,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:48:12,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:48:12,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:48:12,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:48:12,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:48:12,295 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:48:12,295 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:12,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:48:12,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:48:12,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:48:12,296 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72aca9735a0330ad4ed4e9de4f21904354ce62c742d488d0b09ce6da875c2798 [2021-11-23 16:48:12,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:48:12,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:48:12,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:48:12,705 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:48:12,706 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:48:12,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-23 16:48:12,772 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/data/5cbf958ba/3d189ea6b7b3447d8281eda72d0bcd97/FLAGb3753d12b [2021-11-23 16:48:13,594 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:48:13,595 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-23 16:48:13,641 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/data/5cbf958ba/3d189ea6b7b3447d8281eda72d0bcd97/FLAGb3753d12b [2021-11-23 16:48:14,138 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/data/5cbf958ba/3d189ea6b7b3447d8281eda72d0bcd97 [2021-11-23 16:48:14,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:48:14,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:48:14,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:48:14,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:48:14,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:48:14,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:48:14" (1/1) ... [2021-11-23 16:48:14,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b753aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:14, skipping insertion in model container [2021-11-23 16:48:14,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:48:14" (1/1) ... [2021-11-23 16:48:14,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:48:14,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:48:14,764 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[8448,8461] [2021-11-23 16:48:14,819 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[12616,12629] [2021-11-23 16:48:14,886 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[20366,20379] [2021-11-23 16:48:14,943 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[27098,27111] [2021-11-23 16:48:15,041 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[47963,47976] [2021-11-23 16:48:15,204 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[73065,73078] [2021-11-23 16:48:15,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:48:15,528 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:48:15,569 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[8448,8461] [2021-11-23 16:48:15,588 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[12616,12629] [2021-11-23 16:48:15,622 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[20366,20379] [2021-11-23 16:48:15,648 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[27098,27111] [2021-11-23 16:48:15,720 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[47963,47976] [2021-11-23 16:48:15,821 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_cb60caee-ae92-4f43-baef-3f2f5c552f9f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c[73065,73078] [2021-11-23 16:48:15,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:48:16,033 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:48:16,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16 WrapperNode [2021-11-23 16:48:16,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:48:16,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:48:16,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:48:16,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:48:16,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (1/1) ... [2021-11-23 16:48:16,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (1/1) ... [2021-11-23 16:48:16,289 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5687 [2021-11-23 16:48:16,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:48:16,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:48:16,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:48:16,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:48:16,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (1/1) ... [2021-11-23 16:48:16,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (1/1) ... [2021-11-23 16:48:16,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (1/1) ... [2021-11-23 16:48:16,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (1/1) ... [2021-11-23 16:48:16,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (1/1) ... [2021-11-23 16:48:16,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (1/1) ... [2021-11-23 16:48:16,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (1/1) ... [2021-11-23 16:48:16,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:48:16,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:48:16,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:48:16,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:48:16,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (1/1) ... [2021-11-23 16:48:16,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:48:16,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:48:16,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:48:16,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:48:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:48:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:48:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:48:16,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:48:17,025 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:48:17,027 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:48:20,637 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:48:20,676 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:48:20,676 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 16:48:20,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:48:20 BoogieIcfgContainer [2021-11-23 16:48:20,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:48:20,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:48:20,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:48:20,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:48:20,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:48:14" (1/3) ... [2021-11-23 16:48:20,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c49b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:48:20, skipping insertion in model container [2021-11-23 16:48:20,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:48:16" (2/3) ... [2021-11-23 16:48:20,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c49b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:48:20, skipping insertion in model container [2021-11-23 16:48:20,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:48:20" (3/3) ... [2021-11-23 16:48:20,691 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2021-11-23 16:48:20,697 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:48:20,697 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-23 16:48:20,774 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:48:20,780 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:48:20,781 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-23 16:48:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 1190 states, 1183 states have (on average 1.7861369399830938) internal successors, (2113), 1189 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:20,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 16:48:20,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:20,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:20,853 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:20,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:20,859 INFO L85 PathProgramCache]: Analyzing trace with hash 46255632, now seen corresponding path program 1 times [2021-11-23 16:48:20,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:20,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873395644] [2021-11-23 16:48:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:20,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:20,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:20,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:20,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:48:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:21,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:21,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:21,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:21,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:21,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873395644] [2021-11-23 16:48:21,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873395644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:21,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:21,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:21,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161639617] [2021-11-23 16:48:21,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:21,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:21,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:21,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:21,966 INFO L87 Difference]: Start difference. First operand has 1190 states, 1183 states have (on average 1.7861369399830938) internal successors, (2113), 1189 states have internal predecessors, (2113), 0 states have call successors, (0), 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 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:23,295 INFO L93 Difference]: Finished difference Result 1351 states and 2360 transitions. [2021-11-23 16:48:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:48:23,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 16:48:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:23,328 INFO L225 Difference]: With dead ends: 1351 [2021-11-23 16:48:23,329 INFO L226 Difference]: Without dead ends: 1181 [2021-11-23 16:48:23,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:48:23,340 INFO L933 BasicCegarLoop]: 2077 mSDtfsCounter, 62 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:23,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 3373 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 801 Invalid, 0 Unknown, 24 Unchecked, 1.1s Time] [2021-11-23 16:48:23,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-11-23 16:48:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1181. [2021-11-23 16:48:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1175 states have (on average 1.2893617021276595) internal successors, (1515), 1180 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1515 transitions. [2021-11-23 16:48:23,473 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1515 transitions. Word has length 52 [2021-11-23 16:48:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:23,475 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1515 transitions. [2021-11-23 16:48:23,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1515 transitions. [2021-11-23 16:48:23,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 16:48:23,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:23,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:23,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:23,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:23,703 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash -625695834, now seen corresponding path program 1 times [2021-11-23 16:48:23,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:23,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695853668] [2021-11-23 16:48:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:23,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:23,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:23,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:23,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:48:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:24,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:24,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:24,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:24,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:24,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695853668] [2021-11-23 16:48:24,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695853668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:24,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:24,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:24,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353873143] [2021-11-23 16:48:24,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:24,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:24,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:24,474 INFO L87 Difference]: Start difference. First operand 1181 states and 1515 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:25,471 INFO L93 Difference]: Finished difference Result 1374 states and 1780 transitions. [2021-11-23 16:48:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:48:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 16:48:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:25,483 INFO L225 Difference]: With dead ends: 1374 [2021-11-23 16:48:25,484 INFO L226 Difference]: Without dead ends: 1101 [2021-11-23 16:48:25,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:48:25,493 INFO L933 BasicCegarLoop]: 1395 mSDtfsCounter, 22 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:25,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2136 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 654 Invalid, 0 Unknown, 13 Unchecked, 0.9s Time] [2021-11-23 16:48:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-11-23 16:48:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1101. [2021-11-23 16:48:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1095 states have (on average 1.2840182648401826) internal successors, (1406), 1100 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1406 transitions. [2021-11-23 16:48:25,573 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1406 transitions. Word has length 52 [2021-11-23 16:48:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:25,574 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1406 transitions. [2021-11-23 16:48:25,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:25,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1406 transitions. [2021-11-23 16:48:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 16:48:25,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:25,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:25,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 16:48:25,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:25,791 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:25,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1958316630, now seen corresponding path program 1 times [2021-11-23 16:48:25,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:25,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573633539] [2021-11-23 16:48:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:25,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:25,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:25,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:25,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:48:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:26,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:26,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:26,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:26,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:26,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573633539] [2021-11-23 16:48:26,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573633539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:26,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:26,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:26,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144622970] [2021-11-23 16:48:26,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:26,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:26,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:26,533 INFO L87 Difference]: Start difference. First operand 1101 states and 1406 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:26,615 INFO L93 Difference]: Finished difference Result 1442 states and 1880 transitions. [2021-11-23 16:48:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:48:26,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 16:48:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:26,622 INFO L225 Difference]: With dead ends: 1442 [2021-11-23 16:48:26,622 INFO L226 Difference]: Without dead ends: 873 [2021-11-23 16:48:26,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:48:26,627 INFO L933 BasicCegarLoop]: 1119 mSDtfsCounter, 26 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 539 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:26,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 2266 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 539 Unchecked, 0.0s Time] [2021-11-23 16:48:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-11-23 16:48:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2021-11-23 16:48:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 867 states have (on average 1.2975778546712802) internal successors, (1125), 872 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1125 transitions. [2021-11-23 16:48:26,656 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1125 transitions. Word has length 52 [2021-11-23 16:48:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:26,657 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1125 transitions. [2021-11-23 16:48:26,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1125 transitions. [2021-11-23 16:48:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 16:48:26,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:26,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:26,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 16:48:26,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:26,872 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1639759782, now seen corresponding path program 1 times [2021-11-23 16:48:26,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:26,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218381427] [2021-11-23 16:48:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:26,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:26,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:26,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:26,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:48:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:27,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:48:27,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:28,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:28,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218381427] [2021-11-23 16:48:28,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218381427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:28,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:28,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:48:28,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143363978] [2021-11-23 16:48:28,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:28,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:48:28,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:28,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:48:28,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:48:28,089 INFO L87 Difference]: Start difference. First operand 873 states and 1125 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:28,158 INFO L93 Difference]: Finished difference Result 967 states and 1263 transitions. [2021-11-23 16:48:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:48:28,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 16:48:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:28,166 INFO L225 Difference]: With dead ends: 967 [2021-11-23 16:48:28,166 INFO L226 Difference]: Without dead ends: 875 [2021-11-23 16:48:28,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:48:28,170 INFO L933 BasicCegarLoop]: 1102 mSDtfsCounter, 38 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1002 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:28,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2987 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 1002 Unchecked, 0.0s Time] [2021-11-23 16:48:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-23 16:48:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2021-11-23 16:48:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 867 states have (on average 1.2964244521337946) internal successors, (1124), 872 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1124 transitions. [2021-11-23 16:48:28,199 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1124 transitions. Word has length 54 [2021-11-23 16:48:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:28,200 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1124 transitions. [2021-11-23 16:48:28,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1124 transitions. [2021-11-23 16:48:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 16:48:28,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:28,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:28,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:28,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:28,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1969154310, now seen corresponding path program 1 times [2021-11-23 16:48:28,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373359015] [2021-11-23 16:48:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:28,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:28,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:28,436 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:28,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:48:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:48:28,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:29,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:29,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:29,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373359015] [2021-11-23 16:48:29,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373359015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:29,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:29,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:48:29,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475646817] [2021-11-23 16:48:29,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:29,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:48:29,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:29,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:48:29,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:48:29,541 INFO L87 Difference]: Start difference. First operand 873 states and 1124 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:29,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:29,609 INFO L93 Difference]: Finished difference Result 881 states and 1131 transitions. [2021-11-23 16:48:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:48:29,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 16:48:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:29,616 INFO L225 Difference]: With dead ends: 881 [2021-11-23 16:48:29,616 INFO L226 Difference]: Without dead ends: 875 [2021-11-23 16:48:29,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:48:29,617 INFO L933 BasicCegarLoop]: 1098 mSDtfsCounter, 48 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 2960 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1028 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:29,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 2960 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 1028 Unchecked, 0.0s Time] [2021-11-23 16:48:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-23 16:48:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2021-11-23 16:48:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 867 states have (on average 1.2952710495963091) internal successors, (1123), 872 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1123 transitions. [2021-11-23 16:48:29,646 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1123 transitions. Word has length 54 [2021-11-23 16:48:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:29,649 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1123 transitions. [2021-11-23 16:48:29,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1123 transitions. [2021-11-23 16:48:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 16:48:29,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:29,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:29,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:29,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:29,870 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash -91421350, now seen corresponding path program 1 times [2021-11-23 16:48:29,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:29,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250358229] [2021-11-23 16:48:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:29,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:29,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:29,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:29,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:48:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:30,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:48:30,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:30,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:30,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:30,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250358229] [2021-11-23 16:48:30,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250358229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:30,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:30,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 16:48:30,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328443747] [2021-11-23 16:48:30,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:30,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:48:30,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:30,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:48:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:48:30,681 INFO L87 Difference]: Start difference. First operand 873 states and 1123 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:31,467 INFO L93 Difference]: Finished difference Result 1020 states and 1338 transitions. [2021-11-23 16:48:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:48:31,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 16:48:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:31,475 INFO L225 Difference]: With dead ends: 1020 [2021-11-23 16:48:31,475 INFO L226 Difference]: Without dead ends: 873 [2021-11-23 16:48:31,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:48:31,477 INFO L933 BasicCegarLoop]: 1103 mSDtfsCounter, 18 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 4058 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1520 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:31,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 4058 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 528 Invalid, 0 Unknown, 1520 Unchecked, 0.7s Time] [2021-11-23 16:48:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-11-23 16:48:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2021-11-23 16:48:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 867 states have (on average 1.2941176470588236) internal successors, (1122), 872 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1122 transitions. [2021-11-23 16:48:31,508 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1122 transitions. Word has length 54 [2021-11-23 16:48:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:31,508 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1122 transitions. [2021-11-23 16:48:31,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1122 transitions. [2021-11-23 16:48:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 16:48:31,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:31,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:31,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:31,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:31,729 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash -908310275, now seen corresponding path program 1 times [2021-11-23 16:48:31,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:31,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179836280] [2021-11-23 16:48:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:31,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:31,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:31,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:31,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:48:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:32,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:32,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:32,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:32,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179836280] [2021-11-23 16:48:32,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179836280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:32,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:32,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:32,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109081492] [2021-11-23 16:48:32,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:32,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:32,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:32,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:32,164 INFO L87 Difference]: Start difference. First operand 873 states and 1122 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:32,419 INFO L93 Difference]: Finished difference Result 1373 states and 1795 transitions. [2021-11-23 16:48:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:32,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 16:48:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:32,426 INFO L225 Difference]: With dead ends: 1373 [2021-11-23 16:48:32,426 INFO L226 Difference]: Without dead ends: 1001 [2021-11-23 16:48:32,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:32,428 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 850 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:32,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1228 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:48:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-11-23 16:48:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 992. [2021-11-23 16:48:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 987 states have (on average 1.3029381965552178) internal successors, (1286), 991 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1286 transitions. [2021-11-23 16:48:32,472 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1286 transitions. Word has length 55 [2021-11-23 16:48:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:32,473 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1286 transitions. [2021-11-23 16:48:32,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1286 transitions. [2021-11-23 16:48:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 16:48:32,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:32,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:32,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:32,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:32,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:32,689 INFO L85 PathProgramCache]: Analyzing trace with hash -217892301, now seen corresponding path program 1 times [2021-11-23 16:48:32,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:32,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090100000] [2021-11-23 16:48:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:32,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:32,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:32,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:32,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:48:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:32,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:32,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:32,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:32,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090100000] [2021-11-23 16:48:32,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090100000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:32,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:32,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:32,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171881587] [2021-11-23 16:48:32,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:32,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:32,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:32,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:32,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:32,996 INFO L87 Difference]: Start difference. First operand 992 states and 1286 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:33,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:33,125 INFO L93 Difference]: Finished difference Result 1499 states and 2017 transitions. [2021-11-23 16:48:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:33,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 16:48:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:33,134 INFO L225 Difference]: With dead ends: 1499 [2021-11-23 16:48:33,134 INFO L226 Difference]: Without dead ends: 1096 [2021-11-23 16:48:33,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:33,137 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 551 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:33,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 1351 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-23 16:48:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1094. [2021-11-23 16:48:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1089 states have (on average 1.298438934802571) internal successors, (1414), 1093 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1414 transitions. [2021-11-23 16:48:33,185 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1414 transitions. Word has length 55 [2021-11-23 16:48:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:33,185 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1414 transitions. [2021-11-23 16:48:33,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1414 transitions. [2021-11-23 16:48:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 16:48:33,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:33,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:33,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:33,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:33,404 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:33,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1212692211, now seen corresponding path program 1 times [2021-11-23 16:48:33,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:33,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998411610] [2021-11-23 16:48:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:33,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:33,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:33,406 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:33,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:48:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:33,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:33,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:33,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:33,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:33,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998411610] [2021-11-23 16:48:33,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998411610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:33,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:33,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:33,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612257562] [2021-11-23 16:48:33,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:33,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:33,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:33,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:33,779 INFO L87 Difference]: Start difference. First operand 1094 states and 1414 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:33,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:33,900 INFO L93 Difference]: Finished difference Result 1616 states and 2171 transitions. [2021-11-23 16:48:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:33,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 16:48:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:33,910 INFO L225 Difference]: With dead ends: 1616 [2021-11-23 16:48:33,910 INFO L226 Difference]: Without dead ends: 1282 [2021-11-23 16:48:33,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:33,912 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 560 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:33,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 1263 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-11-23 16:48:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1049. [2021-11-23 16:48:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1044 states have (on average 1.3084291187739463) internal successors, (1366), 1048 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1366 transitions. [2021-11-23 16:48:33,961 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1366 transitions. Word has length 55 [2021-11-23 16:48:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:33,961 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1366 transitions. [2021-11-23 16:48:33,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1366 transitions. [2021-11-23 16:48:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 16:48:33,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:33,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:33,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:34,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:34,178 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:34,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:34,179 INFO L85 PathProgramCache]: Analyzing trace with hash 508156110, now seen corresponding path program 1 times [2021-11-23 16:48:34,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:34,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65089493] [2021-11-23 16:48:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:34,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:34,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:34,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:34,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:48:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:34,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:34,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:34,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65089493] [2021-11-23 16:48:34,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65089493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:34,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:34,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:34,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16051499] [2021-11-23 16:48:34,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:34,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:34,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:34,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:34,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:34,524 INFO L87 Difference]: Start difference. First operand 1049 states and 1366 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:34,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:34,650 INFO L93 Difference]: Finished difference Result 1676 states and 2274 transitions. [2021-11-23 16:48:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:34,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 16:48:34,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:34,658 INFO L225 Difference]: With dead ends: 1676 [2021-11-23 16:48:34,659 INFO L226 Difference]: Without dead ends: 1270 [2021-11-23 16:48:34,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:34,660 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 436 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:34,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 1379 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-11-23 16:48:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1268. [2021-11-23 16:48:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1263 states have (on average 1.3222486144101346) internal successors, (1670), 1267 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1670 transitions. [2021-11-23 16:48:34,717 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1670 transitions. Word has length 55 [2021-11-23 16:48:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:34,718 INFO L470 AbstractCegarLoop]: Abstraction has 1268 states and 1670 transitions. [2021-11-23 16:48:34,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1670 transitions. [2021-11-23 16:48:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 16:48:34,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:34,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:34,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:34,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:34,932 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:34,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1913282601, now seen corresponding path program 1 times [2021-11-23 16:48:34,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:34,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359066253] [2021-11-23 16:48:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:34,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:34,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:34,935 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:34,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:48:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:35,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:35,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:35,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:35,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359066253] [2021-11-23 16:48:35,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359066253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:35,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:35,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:35,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936626321] [2021-11-23 16:48:35,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:35,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:35,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:35,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:35,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:35,288 INFO L87 Difference]: Start difference. First operand 1268 states and 1670 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:35,471 INFO L93 Difference]: Finished difference Result 2535 states and 3482 transitions. [2021-11-23 16:48:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:35,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 16:48:35,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:35,482 INFO L225 Difference]: With dead ends: 2535 [2021-11-23 16:48:35,482 INFO L226 Difference]: Without dead ends: 1722 [2021-11-23 16:48:35,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:35,485 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 639 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:35,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 944 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-11-23 16:48:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1345. [2021-11-23 16:48:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1341 states have (on average 1.3445190156599554) internal successors, (1803), 1344 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1803 transitions. [2021-11-23 16:48:35,558 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1803 transitions. Word has length 55 [2021-11-23 16:48:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:35,558 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 1803 transitions. [2021-11-23 16:48:35,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1803 transitions. [2021-11-23 16:48:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 16:48:35,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:35,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:35,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:35,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:35,773 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1142157029, now seen corresponding path program 1 times [2021-11-23 16:48:35,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:35,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241629066] [2021-11-23 16:48:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:35,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:35,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:35,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:35,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:48:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:48:36,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:37,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:37,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:37,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241629066] [2021-11-23 16:48:37,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241629066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:37,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:37,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 16:48:37,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928260472] [2021-11-23 16:48:37,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:37,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 16:48:37,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:37,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 16:48:37,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:48:37,571 INFO L87 Difference]: Start difference. First operand 1345 states and 1803 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:37,978 INFO L93 Difference]: Finished difference Result 1396 states and 1875 transitions. [2021-11-23 16:48:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 16:48:37,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 16:48:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:37,988 INFO L225 Difference]: With dead ends: 1396 [2021-11-23 16:48:37,988 INFO L226 Difference]: Without dead ends: 1295 [2021-11-23 16:48:37,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:48:37,991 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 83 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:37,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 3192 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 250 Unchecked, 0.3s Time] [2021-11-23 16:48:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-23 16:48:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1295. [2021-11-23 16:48:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1293 states have (on average 1.3464810518174788) internal successors, (1741), 1294 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1741 transitions. [2021-11-23 16:48:38,061 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1741 transitions. Word has length 56 [2021-11-23 16:48:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:38,061 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1741 transitions. [2021-11-23 16:48:38,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1741 transitions. [2021-11-23 16:48:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 16:48:38,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:38,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:38,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:38,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:38,279 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:38,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1444192760, now seen corresponding path program 1 times [2021-11-23 16:48:38,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:38,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533633736] [2021-11-23 16:48:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:38,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:38,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:38,281 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:38,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:48:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:38,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 16:48:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:40,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:40,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:40,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533633736] [2021-11-23 16:48:40,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533633736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:40,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:40,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-23 16:48:40,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689416752] [2021-11-23 16:48:40,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:40,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 16:48:40,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:40,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 16:48:40,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:48:40,889 INFO L87 Difference]: Start difference. First operand 1295 states and 1741 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:41,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:41,629 INFO L93 Difference]: Finished difference Result 3881 states and 5496 transitions. [2021-11-23 16:48:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 16:48:41,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-23 16:48:41,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:41,654 INFO L225 Difference]: With dead ends: 3881 [2021-11-23 16:48:41,655 INFO L226 Difference]: Without dead ends: 3801 [2021-11-23 16:48:41,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:48:41,658 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 2531 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 3802 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 890 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:41,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2531 Valid, 3802 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 268 Invalid, 0 Unknown, 890 Unchecked, 0.5s Time] [2021-11-23 16:48:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-11-23 16:48:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 1303. [2021-11-23 16:48:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1301 states have (on average 1.3458877786318217) internal successors, (1751), 1302 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:41,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1751 transitions. [2021-11-23 16:48:41,815 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1751 transitions. Word has length 57 [2021-11-23 16:48:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:41,815 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 1751 transitions. [2021-11-23 16:48:41,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1751 transitions. [2021-11-23 16:48:41,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 16:48:41,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:41,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:41,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:42,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:42,030 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2124806246, now seen corresponding path program 1 times [2021-11-23 16:48:42,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649613910] [2021-11-23 16:48:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:42,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:42,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:42,034 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:42,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:48:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:42,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:48:42,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:44,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:44,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649613910] [2021-11-23 16:48:44,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649613910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:44,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:44,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-23 16:48:44,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665416403] [2021-11-23 16:48:44,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:44,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 16:48:44,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:44,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 16:48:44,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:48:44,485 INFO L87 Difference]: Start difference. First operand 1303 states and 1751 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:45,239 INFO L93 Difference]: Finished difference Result 3856 states and 5462 transitions. [2021-11-23 16:48:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 16:48:45,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 16:48:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:45,259 INFO L225 Difference]: With dead ends: 3856 [2021-11-23 16:48:45,259 INFO L226 Difference]: Without dead ends: 3776 [2021-11-23 16:48:45,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:48:45,261 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 1951 mSDsluCounter, 3262 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1951 SdHoareTripleChecker+Valid, 3790 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1240 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:45,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1951 Valid, 3790 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 279 Invalid, 0 Unknown, 1240 Unchecked, 0.4s Time] [2021-11-23 16:48:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-11-23 16:48:45,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 1266. [2021-11-23 16:48:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3462450592885375) internal successors, (1703), 1265 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:45,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1703 transitions. [2021-11-23 16:48:45,369 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1703 transitions. Word has length 58 [2021-11-23 16:48:45,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:45,370 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1703 transitions. [2021-11-23 16:48:45,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:45,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1703 transitions. [2021-11-23 16:48:45,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 16:48:45,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:45,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:45,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:45,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:45,585 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -386654778, now seen corresponding path program 1 times [2021-11-23 16:48:45,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:45,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151149911] [2021-11-23 16:48:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:45,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:45,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:45,587 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:45,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:48:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:46,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:46,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:46,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151149911] [2021-11-23 16:48:46,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151149911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:46,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:46,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:48:46,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531909555] [2021-11-23 16:48:46,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:46,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:46,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:46,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:46,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:46,449 INFO L87 Difference]: Start difference. First operand 1266 states and 1703 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:46,645 INFO L93 Difference]: Finished difference Result 1935 states and 2682 transitions. [2021-11-23 16:48:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:48:46,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 16:48:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:46,652 INFO L225 Difference]: With dead ends: 1935 [2021-11-23 16:48:46,652 INFO L226 Difference]: Without dead ends: 1147 [2021-11-23 16:48:46,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:46,654 INFO L933 BasicCegarLoop]: 547 mSDtfsCounter, 476 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:46,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 1483 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2021-11-23 16:48:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-23 16:48:46,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1080. [2021-11-23 16:48:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 1.3308619091751621) internal successors, (1436), 1079 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1436 transitions. [2021-11-23 16:48:46,738 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1436 transitions. Word has length 61 [2021-11-23 16:48:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:46,738 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1436 transitions. [2021-11-23 16:48:46,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:46,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1436 transitions. [2021-11-23 16:48:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 16:48:46,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:46,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:46,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:46,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:46,953 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1248749293, now seen corresponding path program 1 times [2021-11-23 16:48:46,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:46,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111439913] [2021-11-23 16:48:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:46,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:46,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:46,956 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:46,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:48:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:47,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:47,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:47,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:47,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:47,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111439913] [2021-11-23 16:48:47,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111439913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:47,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:47,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:47,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493732954] [2021-11-23 16:48:47,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:47,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:47,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:47,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:47,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:47,415 INFO L87 Difference]: Start difference. First operand 1080 states and 1436 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:47,732 INFO L93 Difference]: Finished difference Result 1361 states and 1838 transitions. [2021-11-23 16:48:47,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:48:47,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 16:48:47,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:47,739 INFO L225 Difference]: With dead ends: 1361 [2021-11-23 16:48:47,739 INFO L226 Difference]: Without dead ends: 1074 [2021-11-23 16:48:47,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:48:47,741 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 13 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:47,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1339 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 246 Invalid, 0 Unknown, 253 Unchecked, 0.3s Time] [2021-11-23 16:48:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-11-23 16:48:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1074. [2021-11-23 16:48:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 1.3317800559179869) internal successors, (1429), 1073 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1429 transitions. [2021-11-23 16:48:47,821 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1429 transitions. Word has length 63 [2021-11-23 16:48:47,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:47,821 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1429 transitions. [2021-11-23 16:48:47,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:47,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1429 transitions. [2021-11-23 16:48:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 16:48:47,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:47,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:47,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 16:48:48,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:48,036 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:48,037 INFO L85 PathProgramCache]: Analyzing trace with hash -188694021, now seen corresponding path program 1 times [2021-11-23 16:48:48,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:48,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462847480] [2021-11-23 16:48:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:48,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:48,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:48,039 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:48,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:48:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:48,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:48,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:48,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:48,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:48,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462847480] [2021-11-23 16:48:48,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462847480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:48,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:48,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:48,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712507592] [2021-11-23 16:48:48,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:48,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:48,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:48,711 INFO L87 Difference]: Start difference. First operand 1074 states and 1429 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:49,160 INFO L93 Difference]: Finished difference Result 1351 states and 1828 transitions. [2021-11-23 16:48:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:48:49,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 16:48:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:49,166 INFO L225 Difference]: With dead ends: 1351 [2021-11-23 16:48:49,166 INFO L226 Difference]: Without dead ends: 1085 [2021-11-23 16:48:49,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:48:49,168 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 28 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:49,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1307 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 457 Invalid, 0 Unknown, 258 Unchecked, 0.4s Time] [2021-11-23 16:48:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-11-23 16:48:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1085. [2021-11-23 16:48:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 1.3284132841328413) internal successors, (1440), 1084 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1440 transitions. [2021-11-23 16:48:49,235 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1440 transitions. Word has length 64 [2021-11-23 16:48:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:49,235 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 1440 transitions. [2021-11-23 16:48:49,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1440 transitions. [2021-11-23 16:48:49,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 16:48:49,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:49,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:49,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:49,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:49,438 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:49,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:49,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1911342900, now seen corresponding path program 1 times [2021-11-23 16:48:49,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:49,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020082681] [2021-11-23 16:48:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:49,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:49,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:49,440 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:49,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 16:48:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:49,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:49,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:50,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:50,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:50,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020082681] [2021-11-23 16:48:50,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020082681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:50,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:50,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:50,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091466720] [2021-11-23 16:48:50,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:50,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:50,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:50,153 INFO L87 Difference]: Start difference. First operand 1085 states and 1440 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:50,633 INFO L93 Difference]: Finished difference Result 1198 states and 1595 transitions. [2021-11-23 16:48:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:48:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 16:48:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:50,639 INFO L225 Difference]: With dead ends: 1198 [2021-11-23 16:48:50,639 INFO L226 Difference]: Without dead ends: 1101 [2021-11-23 16:48:50,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:48:50,641 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 28 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:50,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1307 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 457 Invalid, 0 Unknown, 258 Unchecked, 0.4s Time] [2021-11-23 16:48:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-11-23 16:48:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1101. [2021-11-23 16:48:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 1.3236363636363637) internal successors, (1456), 1100 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1456 transitions. [2021-11-23 16:48:50,718 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1456 transitions. Word has length 65 [2021-11-23 16:48:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:50,718 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1456 transitions. [2021-11-23 16:48:50,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1456 transitions. [2021-11-23 16:48:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 16:48:50,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:50,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:50,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:50,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:50,934 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash -840919221, now seen corresponding path program 1 times [2021-11-23 16:48:50,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:50,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816616563] [2021-11-23 16:48:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:50,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:50,936 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:50,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 16:48:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:51,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:51,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:51,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:51,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816616563] [2021-11-23 16:48:51,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816616563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:51,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:51,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:51,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295345796] [2021-11-23 16:48:51,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:51,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:51,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:51,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:51,337 INFO L87 Difference]: Start difference. First operand 1101 states and 1456 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:51,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:51,730 INFO L93 Difference]: Finished difference Result 1383 states and 1861 transitions. [2021-11-23 16:48:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:48:51,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 16:48:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:51,736 INFO L225 Difference]: With dead ends: 1383 [2021-11-23 16:48:51,737 INFO L226 Difference]: Without dead ends: 1039 [2021-11-23 16:48:51,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:48:51,739 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 17 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:51,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1009 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 439 Invalid, 0 Unknown, 10 Unchecked, 0.3s Time] [2021-11-23 16:48:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-11-23 16:48:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1039. [2021-11-23 16:48:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 1.3391136801541426) internal successors, (1390), 1038 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1390 transitions. [2021-11-23 16:48:51,802 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1390 transitions. Word has length 65 [2021-11-23 16:48:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:51,802 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 1390 transitions. [2021-11-23 16:48:51,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:51,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1390 transitions. [2021-11-23 16:48:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 16:48:51,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:51,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:51,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:52,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:52,005 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:52,005 INFO L85 PathProgramCache]: Analyzing trace with hash 855327971, now seen corresponding path program 1 times [2021-11-23 16:48:52,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:52,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211339540] [2021-11-23 16:48:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:52,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:52,007 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:52,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:48:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:52,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:48:52,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:52,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:52,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:52,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211339540] [2021-11-23 16:48:52,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211339540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:52,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:52,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 16:48:52,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978832247] [2021-11-23 16:48:52,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:52,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:48:52,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:52,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:48:52,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:48:52,635 INFO L87 Difference]: Start difference. First operand 1039 states and 1390 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:52,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:52,722 INFO L93 Difference]: Finished difference Result 1321 states and 1793 transitions. [2021-11-23 16:48:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:48:52,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 16:48:52,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:52,727 INFO L225 Difference]: With dead ends: 1321 [2021-11-23 16:48:52,727 INFO L226 Difference]: Without dead ends: 1039 [2021-11-23 16:48:52,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:48:52,729 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 16 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:52,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1577 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 639 Unchecked, 0.0s Time] [2021-11-23 16:48:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-11-23 16:48:52,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1039. [2021-11-23 16:48:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 1.3381502890173411) internal successors, (1389), 1038 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1389 transitions. [2021-11-23 16:48:52,800 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1389 transitions. Word has length 65 [2021-11-23 16:48:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:52,801 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 1389 transitions. [2021-11-23 16:48:52,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1389 transitions. [2021-11-23 16:48:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 16:48:52,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:52,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:52,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:53,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:53,016 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1776716031, now seen corresponding path program 1 times [2021-11-23 16:48:53,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:53,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014330802] [2021-11-23 16:48:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:53,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:53,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:53,018 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:53,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 16:48:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:53,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:48:53,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:53,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:53,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:53,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014330802] [2021-11-23 16:48:53,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014330802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:53,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:53,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:48:53,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699061500] [2021-11-23 16:48:53,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:53,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:48:53,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:48:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:48:53,741 INFO L87 Difference]: Start difference. First operand 1039 states and 1389 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:53,995 INFO L93 Difference]: Finished difference Result 1303 states and 1774 transitions. [2021-11-23 16:48:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:48:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 16:48:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:53,997 INFO L225 Difference]: With dead ends: 1303 [2021-11-23 16:48:53,998 INFO L226 Difference]: Without dead ends: 1024 [2021-11-23 16:48:53,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:48:54,000 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 30 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:54,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1088 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 224 Unchecked, 0.2s Time] [2021-11-23 16:48:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-11-23 16:48:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1024. [2021-11-23 16:48:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.3411534701857282) internal successors, (1372), 1023 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1372 transitions. [2021-11-23 16:48:54,057 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1372 transitions. Word has length 66 [2021-11-23 16:48:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:54,058 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1372 transitions. [2021-11-23 16:48:54,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1372 transitions. [2021-11-23 16:48:54,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 16:48:54,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:54,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:54,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:54,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:54,270 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:54,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1160935487, now seen corresponding path program 1 times [2021-11-23 16:48:54,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:54,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555853901] [2021-11-23 16:48:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:54,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:54,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:54,272 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:54,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 16:48:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:54,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:54,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:54,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:54,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:54,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555853901] [2021-11-23 16:48:54,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555853901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:54,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:54,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:54,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641479332] [2021-11-23 16:48:54,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:54,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:54,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:54,682 INFO L87 Difference]: Start difference. First operand 1024 states and 1372 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:54,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:54,923 INFO L93 Difference]: Finished difference Result 1149 states and 1543 transitions. [2021-11-23 16:48:54,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:48:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 16:48:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:54,926 INFO L225 Difference]: With dead ends: 1149 [2021-11-23 16:48:54,926 INFO L226 Difference]: Without dead ends: 1018 [2021-11-23 16:48:54,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:48:54,927 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 20 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:54,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 761 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2021-11-23 16:48:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-11-23 16:48:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 1018. [2021-11-23 16:48:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.3421828908554572) internal successors, (1365), 1017 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1365 transitions. [2021-11-23 16:48:55,010 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1365 transitions. Word has length 66 [2021-11-23 16:48:55,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:55,010 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1365 transitions. [2021-11-23 16:48:55,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1365 transitions. [2021-11-23 16:48:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 16:48:55,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:55,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:55,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:55,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:55,225 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:55,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1002746567, now seen corresponding path program 1 times [2021-11-23 16:48:55,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:55,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231901800] [2021-11-23 16:48:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:55,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:55,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:55,229 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:55,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 16:48:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:55,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:55,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:55,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:55,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:55,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231901800] [2021-11-23 16:48:55,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231901800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:55,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:55,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:55,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991292667] [2021-11-23 16:48:55,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:55,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:55,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:55,518 INFO L87 Difference]: Start difference. First operand 1018 states and 1365 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:55,637 INFO L93 Difference]: Finished difference Result 2096 states and 2943 transitions. [2021-11-23 16:48:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:55,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 16:48:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:55,641 INFO L225 Difference]: With dead ends: 2096 [2021-11-23 16:48:55,641 INFO L226 Difference]: Without dead ends: 1494 [2021-11-23 16:48:55,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:55,644 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 285 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:55,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 738 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-11-23 16:48:55,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1492. [2021-11-23 16:48:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 1.3715627095908787) internal successors, (2045), 1491 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2045 transitions. [2021-11-23 16:48:55,761 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2045 transitions. Word has length 66 [2021-11-23 16:48:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:55,761 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 2045 transitions. [2021-11-23 16:48:55,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2045 transitions. [2021-11-23 16:48:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 16:48:55,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:55,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:55,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:55,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:55,972 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:55,973 INFO L85 PathProgramCache]: Analyzing trace with hash 611312812, now seen corresponding path program 1 times [2021-11-23 16:48:55,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:55,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118483941] [2021-11-23 16:48:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:55,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:55,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:55,974 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:55,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 16:48:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:56,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:56,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:56,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:56,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:56,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118483941] [2021-11-23 16:48:56,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118483941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:56,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:56,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:48:56,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920362849] [2021-11-23 16:48:56,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:56,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:56,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:56,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:56,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:56,589 INFO L87 Difference]: Start difference. First operand 1492 states and 2045 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:56,844 INFO L93 Difference]: Finished difference Result 1968 states and 2732 transitions. [2021-11-23 16:48:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:48:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-23 16:48:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:56,847 INFO L225 Difference]: With dead ends: 1968 [2021-11-23 16:48:56,847 INFO L226 Difference]: Without dead ends: 1492 [2021-11-23 16:48:56,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:48:56,849 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 39 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:56,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 741 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-11-23 16:48:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-11-23 16:48:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1492. [2021-11-23 16:48:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 1.3708920187793427) internal successors, (2044), 1491 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2044 transitions. [2021-11-23 16:48:56,929 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2044 transitions. Word has length 68 [2021-11-23 16:48:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:56,929 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 2044 transitions. [2021-11-23 16:48:56,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:56,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2044 transitions. [2021-11-23 16:48:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 16:48:56,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:56,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:56,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-23 16:48:57,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:57,144 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 653561022, now seen corresponding path program 1 times [2021-11-23 16:48:57,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:57,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085034713] [2021-11-23 16:48:57,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:57,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:57,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:57,147 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:57,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 16:48:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:48:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:57,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:57,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:57,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085034713] [2021-11-23 16:48:57,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085034713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:57,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:57,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:48:57,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493706364] [2021-11-23 16:48:57,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:57,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:48:57,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:57,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:48:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:48:57,887 INFO L87 Difference]: Start difference. First operand 1492 states and 2044 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:58,148 INFO L93 Difference]: Finished difference Result 2228 states and 3108 transitions. [2021-11-23 16:48:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:48:58,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-23 16:48:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:58,152 INFO L225 Difference]: With dead ends: 2228 [2021-11-23 16:48:58,152 INFO L226 Difference]: Without dead ends: 1474 [2021-11-23 16:48:58,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:48:58,155 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 37 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:58,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1067 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 0 Unknown, 218 Unchecked, 0.2s Time] [2021-11-23 16:48:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-11-23 16:48:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2021-11-23 16:48:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 1.372029871011541) internal successors, (2021), 1473 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2021 transitions. [2021-11-23 16:48:58,275 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2021 transitions. Word has length 68 [2021-11-23 16:48:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:58,275 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 2021 transitions. [2021-11-23 16:48:58,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2021 transitions. [2021-11-23 16:48:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 16:48:58,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:58,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:58,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:58,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:58,490 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash 202012000, now seen corresponding path program 1 times [2021-11-23 16:48:58,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:58,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230384105] [2021-11-23 16:48:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:58,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:58,493 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:58,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 16:48:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:58,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:48:58,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:59,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:59,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:59,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230384105] [2021-11-23 16:48:59,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230384105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:59,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:59,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:48:59,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481822106] [2021-11-23 16:48:59,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:59,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:59,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:59,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:59,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:59,143 INFO L87 Difference]: Start difference. First operand 1474 states and 2021 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:59,429 INFO L93 Difference]: Finished difference Result 4210 states and 5985 transitions. [2021-11-23 16:48:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:48:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 16:48:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:59,434 INFO L225 Difference]: With dead ends: 4210 [2021-11-23 16:48:59,434 INFO L226 Difference]: Without dead ends: 3134 [2021-11-23 16:48:59,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:59,437 INFO L933 BasicCegarLoop]: 484 mSDtfsCounter, 943 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:59,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 841 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2021-11-23 16:48:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 2550. [2021-11-23 16:48:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 1.3844644958807375) internal successors, (3529), 2549 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:59,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3529 transitions. [2021-11-23 16:48:59,617 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3529 transitions. Word has length 69 [2021-11-23 16:48:59,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:59,618 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 3529 transitions. [2021-11-23 16:48:59,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3529 transitions. [2021-11-23 16:48:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 16:48:59,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:59,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:59,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:59,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:59,834 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:48:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1702381231, now seen corresponding path program 1 times [2021-11-23 16:48:59,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050911382] [2021-11-23 16:48:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:59,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:59,837 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:59,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 16:49:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:00,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:49:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:00,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:00,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:00,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050911382] [2021-11-23 16:49:00,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050911382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:00,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:00,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:49:00,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336667169] [2021-11-23 16:49:00,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:00,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:00,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:00,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:00,179 INFO L87 Difference]: Start difference. First operand 2550 states and 3529 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:00,878 INFO L93 Difference]: Finished difference Result 5318 states and 7348 transitions. [2021-11-23 16:49:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:49:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 16:49:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:00,887 INFO L225 Difference]: With dead ends: 5318 [2021-11-23 16:49:00,887 INFO L226 Difference]: Without dead ends: 5316 [2021-11-23 16:49:00,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:00,889 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 572 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:00,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 1666 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:49:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2021-11-23 16:49:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 2718. [2021-11-23 16:49:01,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2717 states have (on average 1.360691939639308) internal successors, (3697), 2717 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 3697 transitions. [2021-11-23 16:49:01,136 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 3697 transitions. Word has length 70 [2021-11-23 16:49:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:01,136 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 3697 transitions. [2021-11-23 16:49:01,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 3697 transitions. [2021-11-23 16:49:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 16:49:01,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:01,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:01,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:01,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:01,351 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1405089048, now seen corresponding path program 1 times [2021-11-23 16:49:01,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:01,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963705396] [2021-11-23 16:49:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:01,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:01,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:01,353 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:01,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 16:49:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:01,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:49:01,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:01,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:01,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:01,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963705396] [2021-11-23 16:49:01,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963705396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:01,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:01,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:01,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477933041] [2021-11-23 16:49:01,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:01,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:49:01,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:49:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:01,908 INFO L87 Difference]: Start difference. First operand 2718 states and 3697 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:02,312 INFO L93 Difference]: Finished difference Result 3763 states and 5150 transitions. [2021-11-23 16:49:02,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:49:02,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 16:49:02,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:02,320 INFO L225 Difference]: With dead ends: 3763 [2021-11-23 16:49:02,320 INFO L226 Difference]: Without dead ends: 2745 [2021-11-23 16:49:02,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:02,324 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 73 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:02,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1290 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-23 16:49:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-11-23 16:49:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2745. [2021-11-23 16:49:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2744 states have (on average 1.3593294460641399) internal successors, (3730), 2744 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 3730 transitions. [2021-11-23 16:49:02,615 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 3730 transitions. Word has length 71 [2021-11-23 16:49:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:02,615 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 3730 transitions. [2021-11-23 16:49:02,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 3730 transitions. [2021-11-23 16:49:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 16:49:02,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:02,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:02,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:02,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:02,823 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1811246508, now seen corresponding path program 1 times [2021-11-23 16:49:02,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:02,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189763533] [2021-11-23 16:49:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:02,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:02,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:02,826 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:02,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 16:49:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:03,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:49:03,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:03,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:03,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:03,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189763533] [2021-11-23 16:49:03,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189763533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:03,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:03,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 16:49:03,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772854553] [2021-11-23 16:49:03,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:03,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:49:03,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:49:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:49:03,401 INFO L87 Difference]: Start difference. First operand 2745 states and 3730 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:03,937 INFO L93 Difference]: Finished difference Result 3127 states and 4252 transitions. [2021-11-23 16:49:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:49:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 16:49:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:03,947 INFO L225 Difference]: With dead ends: 3127 [2021-11-23 16:49:03,948 INFO L226 Difference]: Without dead ends: 2745 [2021-11-23 16:49:03,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:03,957 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 17 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:03,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1776 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 611 Unchecked, 0.3s Time] [2021-11-23 16:49:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-11-23 16:49:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2745. [2021-11-23 16:49:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2744 states have (on average 1.3589650145772594) internal successors, (3729), 2744 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 3729 transitions. [2021-11-23 16:49:04,280 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 3729 transitions. Word has length 71 [2021-11-23 16:49:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:04,280 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 3729 transitions. [2021-11-23 16:49:04,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 3729 transitions. [2021-11-23 16:49:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 16:49:04,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:04,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:04,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:04,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:04,499 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:04,499 INFO L85 PathProgramCache]: Analyzing trace with hash 976975624, now seen corresponding path program 1 times [2021-11-23 16:49:04,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:04,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617400707] [2021-11-23 16:49:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:04,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:04,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:04,501 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:04,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 16:49:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:04,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:49:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:05,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:05,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:05,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617400707] [2021-11-23 16:49:05,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617400707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:05,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:05,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:05,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561112674] [2021-11-23 16:49:05,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:05,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:49:05,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:05,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:49:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:05,038 INFO L87 Difference]: Start difference. First operand 2745 states and 3729 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:05,391 INFO L93 Difference]: Finished difference Result 4569 states and 6251 transitions. [2021-11-23 16:49:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:49:05,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 16:49:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:05,399 INFO L225 Difference]: With dead ends: 4569 [2021-11-23 16:49:05,399 INFO L226 Difference]: Without dead ends: 3579 [2021-11-23 16:49:05,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:05,402 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 120 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:05,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1394 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-11-23 16:49:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-11-23 16:49:05,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3577. [2021-11-23 16:49:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3577 states, 3576 states have (on average 1.3548657718120805) internal successors, (4845), 3576 states have internal predecessors, (4845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3577 states to 3577 states and 4845 transitions. [2021-11-23 16:49:05,867 INFO L78 Accepts]: Start accepts. Automaton has 3577 states and 4845 transitions. Word has length 71 [2021-11-23 16:49:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:05,868 INFO L470 AbstractCegarLoop]: Abstraction has 3577 states and 4845 transitions. [2021-11-23 16:49:05,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3577 states and 4845 transitions. [2021-11-23 16:49:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 16:49:05,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:05,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:05,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:06,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:06,083 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:06,083 INFO L85 PathProgramCache]: Analyzing trace with hash -881082828, now seen corresponding path program 1 times [2021-11-23 16:49:06,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:06,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834630946] [2021-11-23 16:49:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:06,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:06,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:06,085 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:06,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 16:49:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:06,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:49:06,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:06,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:06,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834630946] [2021-11-23 16:49:06,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834630946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:06,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:06,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:06,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087074499] [2021-11-23 16:49:06,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:06,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:06,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:06,841 INFO L87 Difference]: Start difference. First operand 3577 states and 4845 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:07,460 INFO L93 Difference]: Finished difference Result 5127 states and 7006 transitions. [2021-11-23 16:49:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:49:07,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 16:49:07,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:07,468 INFO L225 Difference]: With dead ends: 5127 [2021-11-23 16:49:07,468 INFO L226 Difference]: Without dead ends: 3552 [2021-11-23 16:49:07,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:49:07,472 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 32 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:07,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1111 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 360 Invalid, 0 Unknown, 205 Unchecked, 0.3s Time] [2021-11-23 16:49:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2021-11-23 16:49:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3552. [2021-11-23 16:49:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 1.3539847930160518) internal successors, (4808), 3551 states have internal predecessors, (4808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 4808 transitions. [2021-11-23 16:49:07,843 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 4808 transitions. Word has length 71 [2021-11-23 16:49:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:07,843 INFO L470 AbstractCegarLoop]: Abstraction has 3552 states and 4808 transitions. [2021-11-23 16:49:07,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 4808 transitions. [2021-11-23 16:49:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 16:49:07,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:07,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:07,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-23 16:49:08,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:08,059 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:08,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1262421470, now seen corresponding path program 1 times [2021-11-23 16:49:08,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:08,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546902023] [2021-11-23 16:49:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:08,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:08,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:08,061 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:08,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 16:49:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:08,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:08,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:08,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:08,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546902023] [2021-11-23 16:49:08,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546902023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:08,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:08,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:49:08,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708794234] [2021-11-23 16:49:08,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:08,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:08,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:08,411 INFO L87 Difference]: Start difference. First operand 3552 states and 4808 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:08,956 INFO L93 Difference]: Finished difference Result 9140 states and 12450 transitions. [2021-11-23 16:49:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 16:49:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:08,963 INFO L225 Difference]: With dead ends: 9140 [2021-11-23 16:49:08,963 INFO L226 Difference]: Without dead ends: 5990 [2021-11-23 16:49:08,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:08,969 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 282 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:08,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 699 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:49:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2021-11-23 16:49:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5988. [2021-11-23 16:49:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5988 states, 5987 states have (on average 1.3389009520628028) internal successors, (8016), 5987 states have internal predecessors, (8016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5988 states to 5988 states and 8016 transitions. [2021-11-23 16:49:09,604 INFO L78 Accepts]: Start accepts. Automaton has 5988 states and 8016 transitions. Word has length 72 [2021-11-23 16:49:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:09,604 INFO L470 AbstractCegarLoop]: Abstraction has 5988 states and 8016 transitions. [2021-11-23 16:49:09,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5988 states and 8016 transitions. [2021-11-23 16:49:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 16:49:09,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:09,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:09,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:09,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:09,820 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:09,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1708953934, now seen corresponding path program 1 times [2021-11-23 16:49:09,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:09,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493509118] [2021-11-23 16:49:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:09,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:09,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:09,824 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:09,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 16:49:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:10,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:49:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:10,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:10,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:10,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493509118] [2021-11-23 16:49:10,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493509118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:10,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:10,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:10,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406214137] [2021-11-23 16:49:10,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:10,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:49:10,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:49:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:10,361 INFO L87 Difference]: Start difference. First operand 5988 states and 8016 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:11,017 INFO L93 Difference]: Finished difference Result 8846 states and 11926 transitions. [2021-11-23 16:49:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:49:11,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-23 16:49:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:11,023 INFO L225 Difference]: With dead ends: 8846 [2021-11-23 16:49:11,023 INFO L226 Difference]: Without dead ends: 6060 [2021-11-23 16:49:11,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:11,026 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 79 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:11,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1240 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2021-11-23 16:49:11,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6060 states. [2021-11-23 16:49:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6060 to 6060. [2021-11-23 16:49:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 1.3373493975903614) internal successors, (8103), 6059 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 8103 transitions. [2021-11-23 16:49:11,645 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 8103 transitions. Word has length 74 [2021-11-23 16:49:11,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:11,645 INFO L470 AbstractCegarLoop]: Abstraction has 6060 states and 8103 transitions. [2021-11-23 16:49:11,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 8103 transitions. [2021-11-23 16:49:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 16:49:11,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:11,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:11,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-23 16:49:11,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:11,861 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:11,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2098708944, now seen corresponding path program 1 times [2021-11-23 16:49:11,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:11,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222917140] [2021-11-23 16:49:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:11,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:11,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:11,863 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:11,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 16:49:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:12,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:12,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:12,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:12,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:12,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222917140] [2021-11-23 16:49:12,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222917140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:12,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:12,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:49:12,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830415128] [2021-11-23 16:49:12,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:12,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:49:12,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:49:12,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:12,669 INFO L87 Difference]: Start difference. First operand 6060 states and 8103 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:13,414 INFO L93 Difference]: Finished difference Result 6686 states and 8954 transitions. [2021-11-23 16:49:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:49:13,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-23 16:49:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:13,421 INFO L225 Difference]: With dead ends: 6686 [2021-11-23 16:49:13,421 INFO L226 Difference]: Without dead ends: 6060 [2021-11-23 16:49:13,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:13,424 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 22 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 748 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:13,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1887 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 748 Unchecked, 0.2s Time] [2021-11-23 16:49:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6060 states. [2021-11-23 16:49:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6060 to 6060. [2021-11-23 16:49:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 1.3371843538537713) internal successors, (8102), 6059 states have internal predecessors, (8102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 8102 transitions. [2021-11-23 16:49:14,123 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 8102 transitions. Word has length 75 [2021-11-23 16:49:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:14,123 INFO L470 AbstractCegarLoop]: Abstraction has 6060 states and 8102 transitions. [2021-11-23 16:49:14,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:14,123 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 8102 transitions. [2021-11-23 16:49:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 16:49:14,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:14,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:14,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-23 16:49:14,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:14,326 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash -204300347, now seen corresponding path program 1 times [2021-11-23 16:49:14,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:14,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146943470] [2021-11-23 16:49:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:14,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:14,328 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:14,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 16:49:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:14,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:49:14,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:14,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:14,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:14,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146943470] [2021-11-23 16:49:14,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146943470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:14,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:14,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:49:14,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573236312] [2021-11-23 16:49:14,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:14,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:14,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:14,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:14,956 INFO L87 Difference]: Start difference. First operand 6060 states and 8102 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:15,729 INFO L93 Difference]: Finished difference Result 8932 states and 12035 transitions. [2021-11-23 16:49:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:49:15,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-23 16:49:15,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:15,738 INFO L225 Difference]: With dead ends: 8932 [2021-11-23 16:49:15,738 INFO L226 Difference]: Without dead ends: 7282 [2021-11-23 16:49:15,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:15,742 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 909 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:15,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 1109 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:49:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7282 states. [2021-11-23 16:49:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7282 to 6800. [2021-11-23 16:49:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6800 states, 6799 states have (on average 1.3310780997205471) internal successors, (9050), 6799 states have internal predecessors, (9050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6800 states to 6800 states and 9050 transitions. [2021-11-23 16:49:16,422 INFO L78 Accepts]: Start accepts. Automaton has 6800 states and 9050 transitions. Word has length 75 [2021-11-23 16:49:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:16,422 INFO L470 AbstractCegarLoop]: Abstraction has 6800 states and 9050 transitions. [2021-11-23 16:49:16,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 6800 states and 9050 transitions. [2021-11-23 16:49:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 16:49:16,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:16,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:16,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-23 16:49:16,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:16,638 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash 721909852, now seen corresponding path program 1 times [2021-11-23 16:49:16,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:16,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274138133] [2021-11-23 16:49:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:16,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:16,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:16,640 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:16,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 16:49:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:16,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:49:16,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:17,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:17,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:17,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274138133] [2021-11-23 16:49:17,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274138133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:17,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:17,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:17,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168809813] [2021-11-23 16:49:17,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:17,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:17,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:17,133 INFO L87 Difference]: Start difference. First operand 6800 states and 9050 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:17,914 INFO L93 Difference]: Finished difference Result 8232 states and 10988 transitions. [2021-11-23 16:49:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:49:17,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-23 16:49:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:17,923 INFO L225 Difference]: With dead ends: 8232 [2021-11-23 16:49:17,923 INFO L226 Difference]: Without dead ends: 6794 [2021-11-23 16:49:17,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:49:17,927 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 19 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:17,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 699 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2021-11-23 16:49:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2021-11-23 16:49:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 6794. [2021-11-23 16:49:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6794 states, 6793 states have (on average 1.3312233181215958) internal successors, (9043), 6793 states have internal predecessors, (9043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6794 states to 6794 states and 9043 transitions. [2021-11-23 16:49:18,803 INFO L78 Accepts]: Start accepts. Automaton has 6794 states and 9043 transitions. Word has length 75 [2021-11-23 16:49:18,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:18,804 INFO L470 AbstractCegarLoop]: Abstraction has 6794 states and 9043 transitions. [2021-11-23 16:49:18,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6794 states and 9043 transitions. [2021-11-23 16:49:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:49:18,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:18,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:18,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-23 16:49:19,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:19,006 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:19,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:19,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1128432063, now seen corresponding path program 1 times [2021-11-23 16:49:19,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:19,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236610377] [2021-11-23 16:49:19,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:19,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:19,008 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:19,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 16:49:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:19,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:19,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:19,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:19,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236610377] [2021-11-23 16:49:19,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236610377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:19,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:19,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:49:19,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247654513] [2021-11-23 16:49:19,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:19,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:49:19,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:49:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:19,784 INFO L87 Difference]: Start difference. First operand 6794 states and 9043 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:20,828 INFO L93 Difference]: Finished difference Result 7931 states and 10586 transitions. [2021-11-23 16:49:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:49:20,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 16:49:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:20,838 INFO L225 Difference]: With dead ends: 7931 [2021-11-23 16:49:20,839 INFO L226 Difference]: Without dead ends: 6794 [2021-11-23 16:49:20,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:20,842 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 27 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:20,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1419 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 360 Invalid, 0 Unknown, 381 Unchecked, 0.3s Time] [2021-11-23 16:49:20,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2021-11-23 16:49:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 6794. [2021-11-23 16:49:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6794 states, 6793 states have (on average 1.3310761077579862) internal successors, (9042), 6793 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6794 states to 6794 states and 9042 transitions. [2021-11-23 16:49:21,558 INFO L78 Accepts]: Start accepts. Automaton has 6794 states and 9042 transitions. Word has length 77 [2021-11-23 16:49:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:21,558 INFO L470 AbstractCegarLoop]: Abstraction has 6794 states and 9042 transitions. [2021-11-23 16:49:21,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6794 states and 9042 transitions. [2021-11-23 16:49:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:49:21,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:21,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:21,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-23 16:49:21,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:21,775 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:21,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:21,775 INFO L85 PathProgramCache]: Analyzing trace with hash -658209163, now seen corresponding path program 1 times [2021-11-23 16:49:21,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:21,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938877025] [2021-11-23 16:49:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:21,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:21,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:21,777 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:21,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 16:49:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:49:21,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:22,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:22,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:22,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938877025] [2021-11-23 16:49:22,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938877025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:22,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:22,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 16:49:22,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031420218] [2021-11-23 16:49:22,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:22,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:49:22,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:49:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:49:22,354 INFO L87 Difference]: Start difference. First operand 6794 states and 9042 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:23,153 INFO L93 Difference]: Finished difference Result 8227 states and 10981 transitions. [2021-11-23 16:49:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:49:23,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 16:49:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:23,162 INFO L225 Difference]: With dead ends: 8227 [2021-11-23 16:49:23,162 INFO L226 Difference]: Without dead ends: 6794 [2021-11-23 16:49:23,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:23,166 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 17 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:23,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1629 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 556 Unchecked, 0.2s Time] [2021-11-23 16:49:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2021-11-23 16:49:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 6794. [2021-11-23 16:49:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6794 states, 6793 states have (on average 1.3309288973943765) internal successors, (9041), 6793 states have internal predecessors, (9041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6794 states to 6794 states and 9041 transitions. [2021-11-23 16:49:23,857 INFO L78 Accepts]: Start accepts. Automaton has 6794 states and 9041 transitions. Word has length 77 [2021-11-23 16:49:23,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:23,857 INFO L470 AbstractCegarLoop]: Abstraction has 6794 states and 9041 transitions. [2021-11-23 16:49:23,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6794 states and 9041 transitions. [2021-11-23 16:49:23,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 16:49:23,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:23,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:23,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:24,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:24,065 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash 755267210, now seen corresponding path program 1 times [2021-11-23 16:49:24,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:24,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274703905] [2021-11-23 16:49:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:24,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:24,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:24,067 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:24,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 16:49:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:24,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:49:24,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:24,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:24,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:24,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274703905] [2021-11-23 16:49:24,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274703905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:24,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:24,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:24,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459653273] [2021-11-23 16:49:24,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:24,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:24,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:24,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:24,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:24,726 INFO L87 Difference]: Start difference. First operand 6794 states and 9041 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:25,620 INFO L93 Difference]: Finished difference Result 7687 states and 10253 transitions. [2021-11-23 16:49:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:49:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 16:49:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:25,629 INFO L225 Difference]: With dead ends: 7687 [2021-11-23 16:49:25,629 INFO L226 Difference]: Without dead ends: 6794 [2021-11-23 16:49:25,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:49:25,633 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 47 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:25,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 675 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2021-11-23 16:49:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2021-11-23 16:49:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 6794. [2021-11-23 16:49:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6794 states, 6793 states have (on average 1.330781687030767) internal successors, (9040), 6793 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6794 states to 6794 states and 9040 transitions. [2021-11-23 16:49:26,292 INFO L78 Accepts]: Start accepts. Automaton has 6794 states and 9040 transitions. Word has length 78 [2021-11-23 16:49:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:26,293 INFO L470 AbstractCegarLoop]: Abstraction has 6794 states and 9040 transitions. [2021-11-23 16:49:26,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6794 states and 9040 transitions. [2021-11-23 16:49:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 16:49:26,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:26,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:26,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:26,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:26,495 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash 93933419, now seen corresponding path program 1 times [2021-11-23 16:49:26,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:26,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003179987] [2021-11-23 16:49:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:26,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:26,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:26,498 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:26,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 16:49:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:26,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:49:26,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:26,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:26,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:26,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003179987] [2021-11-23 16:49:26,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003179987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:26,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:26,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:26,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557428234] [2021-11-23 16:49:26,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:26,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:49:26,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:26,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:49:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:26,995 INFO L87 Difference]: Start difference. First operand 6794 states and 9040 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:27,636 INFO L93 Difference]: Finished difference Result 7696 states and 10264 transitions. [2021-11-23 16:49:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:49:27,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 16:49:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:27,644 INFO L225 Difference]: With dead ends: 7696 [2021-11-23 16:49:27,644 INFO L226 Difference]: Without dead ends: 6806 [2021-11-23 16:49:27,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:27,648 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 62 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:27,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1172 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2021-11-23 16:49:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6806 states. [2021-11-23 16:49:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6806 to 6797. [2021-11-23 16:49:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6797 states, 6796 states have (on average 1.3306356680400235) internal successors, (9043), 6796 states have internal predecessors, (9043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6797 states to 6797 states and 9043 transitions. [2021-11-23 16:49:28,272 INFO L78 Accepts]: Start accepts. Automaton has 6797 states and 9043 transitions. Word has length 78 [2021-11-23 16:49:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:28,273 INFO L470 AbstractCegarLoop]: Abstraction has 6797 states and 9043 transitions. [2021-11-23 16:49:28,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6797 states and 9043 transitions. [2021-11-23 16:49:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 16:49:28,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:28,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:28,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:28,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:28,475 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1403799967, now seen corresponding path program 1 times [2021-11-23 16:49:28,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:28,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650957165] [2021-11-23 16:49:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:28,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:28,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:28,477 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:28,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 16:49:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:28,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:29,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:29,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:29,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650957165] [2021-11-23 16:49:29,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650957165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:29,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:29,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:49:29,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3211271] [2021-11-23 16:49:29,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:29,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:49:29,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:29,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:49:29,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:29,291 INFO L87 Difference]: Start difference. First operand 6797 states and 9043 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:30,179 INFO L93 Difference]: Finished difference Result 7277 states and 9710 transitions. [2021-11-23 16:49:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:49:30,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 16:49:30,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:30,188 INFO L225 Difference]: With dead ends: 7277 [2021-11-23 16:49:30,188 INFO L226 Difference]: Without dead ends: 6784 [2021-11-23 16:49:30,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:30,192 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 27 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:30,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1860 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 342 Invalid, 0 Unknown, 711 Unchecked, 0.3s Time] [2021-11-23 16:49:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6784 states. [2021-11-23 16:49:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6784 to 6784. [2021-11-23 16:49:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6784 states, 6783 states have (on average 1.330827067669173) internal successors, (9027), 6783 states have internal predecessors, (9027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6784 states to 6784 states and 9027 transitions. [2021-11-23 16:49:30,811 INFO L78 Accepts]: Start accepts. Automaton has 6784 states and 9027 transitions. Word has length 78 [2021-11-23 16:49:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:30,812 INFO L470 AbstractCegarLoop]: Abstraction has 6784 states and 9027 transitions. [2021-11-23 16:49:30,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 6784 states and 9027 transitions. [2021-11-23 16:49:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 16:49:30,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:30,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:30,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-23 16:49:31,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:31,015 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:31,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:31,015 INFO L85 PathProgramCache]: Analyzing trace with hash -686534444, now seen corresponding path program 1 times [2021-11-23 16:49:31,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:31,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45842876] [2021-11-23 16:49:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:31,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:31,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:31,016 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:31,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 16:49:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:31,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:31,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:31,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:31,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45842876] [2021-11-23 16:49:31,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45842876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:31,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:31,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:49:31,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755804799] [2021-11-23 16:49:31,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:31,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:49:31,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:49:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:31,849 INFO L87 Difference]: Start difference. First operand 6784 states and 9027 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:32,697 INFO L93 Difference]: Finished difference Result 7264 states and 9694 transitions. [2021-11-23 16:49:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:49:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 16:49:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:32,705 INFO L225 Difference]: With dead ends: 7264 [2021-11-23 16:49:32,705 INFO L226 Difference]: Without dead ends: 6768 [2021-11-23 16:49:32,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:32,709 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 33 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:32,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1200 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 347 Invalid, 0 Unknown, 199 Unchecked, 0.3s Time] [2021-11-23 16:49:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2021-11-23 16:49:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6768. [2021-11-23 16:49:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6768 states, 6767 states have (on average 1.3311659524161372) internal successors, (9008), 6767 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6768 states to 6768 states and 9008 transitions. [2021-11-23 16:49:33,334 INFO L78 Accepts]: Start accepts. Automaton has 6768 states and 9008 transitions. Word has length 78 [2021-11-23 16:49:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:33,335 INFO L470 AbstractCegarLoop]: Abstraction has 6768 states and 9008 transitions. [2021-11-23 16:49:33,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6768 states and 9008 transitions. [2021-11-23 16:49:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:49:33,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:33,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:33,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:33,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:33,537 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash -825557430, now seen corresponding path program 1 times [2021-11-23 16:49:33,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:33,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187354105] [2021-11-23 16:49:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:33,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:33,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:33,541 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:33,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 16:49:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:49:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:34,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:34,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187354105] [2021-11-23 16:49:34,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187354105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:34,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:34,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:49:34,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476226952] [2021-11-23 16:49:34,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:34,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:34,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:34,166 INFO L87 Difference]: Start difference. First operand 6768 states and 9008 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:34,944 INFO L93 Difference]: Finished difference Result 8872 states and 11905 transitions. [2021-11-23 16:49:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:49:34,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 16:49:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:34,954 INFO L225 Difference]: With dead ends: 8872 [2021-11-23 16:49:34,954 INFO L226 Difference]: Without dead ends: 7722 [2021-11-23 16:49:34,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:34,959 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 553 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:34,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 1135 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:49:34,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7722 states. [2021-11-23 16:49:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7722 to 7554. [2021-11-23 16:49:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7554 states, 7553 states have (on average 1.328478750165497) internal successors, (10034), 7553 states have internal predecessors, (10034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 10034 transitions. [2021-11-23 16:49:35,834 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 10034 transitions. Word has length 79 [2021-11-23 16:49:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:35,835 INFO L470 AbstractCegarLoop]: Abstraction has 7554 states and 10034 transitions. [2021-11-23 16:49:35,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 10034 transitions. [2021-11-23 16:49:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:49:35,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:35,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:35,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:36,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:36,038 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1924993383, now seen corresponding path program 1 times [2021-11-23 16:49:36,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093833729] [2021-11-23 16:49:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:36,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:36,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:36,041 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:36,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 16:49:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:36,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:49:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:36,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:36,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:36,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093833729] [2021-11-23 16:49:36,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093833729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:36,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:36,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:36,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73631387] [2021-11-23 16:49:36,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:36,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:36,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:36,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:36,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:36,773 INFO L87 Difference]: Start difference. First operand 7554 states and 10034 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:37,673 INFO L93 Difference]: Finished difference Result 8040 states and 10707 transitions. [2021-11-23 16:49:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:49:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 16:49:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:37,683 INFO L225 Difference]: With dead ends: 8040 [2021-11-23 16:49:37,683 INFO L226 Difference]: Without dead ends: 7557 [2021-11-23 16:49:37,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:49:37,686 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 37 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:37,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1079 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 198 Unchecked, 0.2s Time] [2021-11-23 16:49:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7557 states. [2021-11-23 16:49:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7557 to 7554. [2021-11-23 16:49:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7554 states, 7553 states have (on average 1.328346352442738) internal successors, (10033), 7553 states have internal predecessors, (10033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 10033 transitions. [2021-11-23 16:49:38,406 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 10033 transitions. Word has length 79 [2021-11-23 16:49:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:38,407 INFO L470 AbstractCegarLoop]: Abstraction has 7554 states and 10033 transitions. [2021-11-23 16:49:38,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 10033 transitions. [2021-11-23 16:49:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:49:38,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:38,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:38,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:38,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:38,610 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:38,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:38,610 INFO L85 PathProgramCache]: Analyzing trace with hash -779578936, now seen corresponding path program 1 times [2021-11-23 16:49:38,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:38,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045322603] [2021-11-23 16:49:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:38,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:38,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:38,611 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:38,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 16:49:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:38,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:49:38,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:39,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:39,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:39,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045322603] [2021-11-23 16:49:39,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045322603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:39,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:39,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:49:39,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629500618] [2021-11-23 16:49:39,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:39,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:39,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:39,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:39,309 INFO L87 Difference]: Start difference. First operand 7554 states and 10033 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:40,165 INFO L93 Difference]: Finished difference Result 9800 states and 13168 transitions. [2021-11-23 16:49:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:49:40,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 16:49:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:40,176 INFO L225 Difference]: With dead ends: 9800 [2021-11-23 16:49:40,176 INFO L226 Difference]: Without dead ends: 8406 [2021-11-23 16:49:40,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:40,181 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 563 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:40,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 1107 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:49:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8406 states. [2021-11-23 16:49:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8406 to 8238. [2021-11-23 16:49:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8238 states, 8237 states have (on average 1.3258467888794463) internal successors, (10921), 8237 states have internal predecessors, (10921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8238 states to 8238 states and 10921 transitions. [2021-11-23 16:49:40,983 INFO L78 Accepts]: Start accepts. Automaton has 8238 states and 10921 transitions. Word has length 79 [2021-11-23 16:49:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:40,984 INFO L470 AbstractCegarLoop]: Abstraction has 8238 states and 10921 transitions. [2021-11-23 16:49:40,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 8238 states and 10921 transitions. [2021-11-23 16:49:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 16:49:40,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:40,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:40,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-11-23 16:49:41,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:41,187 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1434153814, now seen corresponding path program 1 times [2021-11-23 16:49:41,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:41,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091280342] [2021-11-23 16:49:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:41,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:41,189 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:41,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 16:49:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:41,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:41,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:42,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:42,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:42,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091280342] [2021-11-23 16:49:42,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091280342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:42,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:42,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:49:42,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406155398] [2021-11-23 16:49:42,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:42,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:49:42,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:42,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:49:42,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:42,130 INFO L87 Difference]: Start difference. First operand 8238 states and 10921 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:42,948 INFO L93 Difference]: Finished difference Result 10232 states and 13622 transitions. [2021-11-23 16:49:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:49:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 16:49:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:42,959 INFO L225 Difference]: With dead ends: 10232 [2021-11-23 16:49:42,960 INFO L226 Difference]: Without dead ends: 8227 [2021-11-23 16:49:42,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:42,964 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 29 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:42,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1222 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 359 Unchecked, 0.0s Time] [2021-11-23 16:49:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-11-23 16:49:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 8227. [2021-11-23 16:49:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8227 states, 8226 states have (on average 1.3260393873085339) internal successors, (10908), 8226 states have internal predecessors, (10908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8227 states to 8227 states and 10908 transitions. [2021-11-23 16:49:43,737 INFO L78 Accepts]: Start accepts. Automaton has 8227 states and 10908 transitions. Word has length 80 [2021-11-23 16:49:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:43,738 INFO L470 AbstractCegarLoop]: Abstraction has 8227 states and 10908 transitions. [2021-11-23 16:49:43,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 8227 states and 10908 transitions. [2021-11-23 16:49:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 16:49:43,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:43,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:43,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:43,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:43,940 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash 310337164, now seen corresponding path program 1 times [2021-11-23 16:49:43,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:43,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456363126] [2021-11-23 16:49:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:43,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:43,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:43,942 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:43,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 16:49:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:44,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:44,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:44,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:44,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:44,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456363126] [2021-11-23 16:49:44,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456363126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:44,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:44,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:49:44,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179088657] [2021-11-23 16:49:44,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:44,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:49:44,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:44,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:49:44,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:44,917 INFO L87 Difference]: Start difference. First operand 8227 states and 10908 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:45,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:45,928 INFO L93 Difference]: Finished difference Result 10221 states and 13609 transitions. [2021-11-23 16:49:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:49:45,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 16:49:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:45,937 INFO L225 Difference]: With dead ends: 10221 [2021-11-23 16:49:45,937 INFO L226 Difference]: Without dead ends: 8213 [2021-11-23 16:49:45,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:45,942 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 32 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 539 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:45,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1622 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 539 Unchecked, 0.2s Time] [2021-11-23 16:49:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8213 states. [2021-11-23 16:49:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8213 to 8213. [2021-11-23 16:49:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 1.3263516804676083) internal successors, (10892), 8212 states have internal predecessors, (10892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 10892 transitions. [2021-11-23 16:49:46,660 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 10892 transitions. Word has length 80 [2021-11-23 16:49:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:46,660 INFO L470 AbstractCegarLoop]: Abstraction has 8213 states and 10892 transitions. [2021-11-23 16:49:46,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 10892 transitions. [2021-11-23 16:49:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 16:49:46,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:46,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:46,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-23 16:49:46,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:46,863 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2144539030, now seen corresponding path program 1 times [2021-11-23 16:49:46,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:46,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389232764] [2021-11-23 16:49:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:46,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:46,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:46,865 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:46,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 16:49:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:49:47,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:47,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:47,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:47,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389232764] [2021-11-23 16:49:47,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389232764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:47,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:47,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:47,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746929458] [2021-11-23 16:49:47,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:47,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:47,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:47,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:47,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:47,571 INFO L87 Difference]: Start difference. First operand 8213 states and 10892 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:48,471 INFO L93 Difference]: Finished difference Result 10208 states and 13594 transitions. [2021-11-23 16:49:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:49:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-23 16:49:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:48,481 INFO L225 Difference]: With dead ends: 10208 [2021-11-23 16:49:48,481 INFO L226 Difference]: Without dead ends: 8213 [2021-11-23 16:49:48,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:49:48,486 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 52 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:48,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 661 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2021-11-23 16:49:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8213 states. [2021-11-23 16:49:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8213 to 8213. [2021-11-23 16:49:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 1.3262299074525086) internal successors, (10891), 8212 states have internal predecessors, (10891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 10891 transitions. [2021-11-23 16:49:49,191 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 10891 transitions. Word has length 81 [2021-11-23 16:49:49,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:49,191 INFO L470 AbstractCegarLoop]: Abstraction has 8213 states and 10891 transitions. [2021-11-23 16:49:49,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:49,191 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 10891 transitions. [2021-11-23 16:49:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 16:49:49,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:49,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:49,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:49,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:49,394 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash 572752918, now seen corresponding path program 1 times [2021-11-23 16:49:49,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:49,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992649205] [2021-11-23 16:49:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:49,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:49,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:49,396 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:49,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-23 16:49:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:49,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:49,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:50,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:50,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:50,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992649205] [2021-11-23 16:49:50,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992649205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:50,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:50,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:49:50,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252329071] [2021-11-23 16:49:50,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:50,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:49:50,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:50,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:49:50,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:50,364 INFO L87 Difference]: Start difference. First operand 8213 states and 10891 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:51,365 INFO L93 Difference]: Finished difference Result 10226 states and 13612 transitions. [2021-11-23 16:49:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:49:51,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-23 16:49:51,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:51,376 INFO L225 Difference]: With dead ends: 10226 [2021-11-23 16:49:51,376 INFO L226 Difference]: Without dead ends: 8231 [2021-11-23 16:49:51,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:51,381 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 27 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:51,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1636 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 330 Invalid, 0 Unknown, 521 Unchecked, 0.3s Time] [2021-11-23 16:49:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8231 states. [2021-11-23 16:49:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8231 to 8231. [2021-11-23 16:49:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8231 states, 8230 states have (on average 1.3255164034021871) internal successors, (10909), 8230 states have internal predecessors, (10909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8231 states to 8231 states and 10909 transitions. [2021-11-23 16:49:52,166 INFO L78 Accepts]: Start accepts. Automaton has 8231 states and 10909 transitions. Word has length 81 [2021-11-23 16:49:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:52,166 INFO L470 AbstractCegarLoop]: Abstraction has 8231 states and 10909 transitions. [2021-11-23 16:49:52,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8231 states and 10909 transitions. [2021-11-23 16:49:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 16:49:52,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:52,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:52,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:52,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:52,369 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:52,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1928734289, now seen corresponding path program 1 times [2021-11-23 16:49:52,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:52,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289323086] [2021-11-23 16:49:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:52,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:52,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:52,370 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:52,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 16:49:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:52,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:49:52,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:52,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:52,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289323086] [2021-11-23 16:49:52,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289323086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:52,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:52,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:52,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318889378] [2021-11-23 16:49:52,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:52,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:49:52,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:52,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:49:52,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:52,913 INFO L87 Difference]: Start difference. First operand 8231 states and 10909 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:53,763 INFO L93 Difference]: Finished difference Result 11235 states and 14939 transitions. [2021-11-23 16:49:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:49:53,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-23 16:49:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:53,775 INFO L225 Difference]: With dead ends: 11235 [2021-11-23 16:49:53,775 INFO L226 Difference]: Without dead ends: 9241 [2021-11-23 16:49:53,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:53,780 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 115 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:53,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1266 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2021-11-23 16:49:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2021-11-23 16:49:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 8715. [2021-11-23 16:49:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8715 states, 8714 states have (on average 1.3230433784714253) internal successors, (11529), 8714 states have internal predecessors, (11529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8715 states to 8715 states and 11529 transitions. [2021-11-23 16:49:54,789 INFO L78 Accepts]: Start accepts. Automaton has 8715 states and 11529 transitions. Word has length 82 [2021-11-23 16:49:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:54,789 INFO L470 AbstractCegarLoop]: Abstraction has 8715 states and 11529 transitions. [2021-11-23 16:49:54,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:54,789 INFO L276 IsEmpty]: Start isEmpty. Operand 8715 states and 11529 transitions. [2021-11-23 16:49:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 16:49:54,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:54,791 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:54,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:54,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:54,995 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:54,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1474417837, now seen corresponding path program 1 times [2021-11-23 16:49:54,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:54,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841447870] [2021-11-23 16:49:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:54,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:54,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:54,997 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:54,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 16:49:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:49:55,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:55,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:55,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:55,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841447870] [2021-11-23 16:49:55,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841447870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:55,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:55,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:55,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499927099] [2021-11-23 16:49:55,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:55,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:49:55,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:49:55,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:55,499 INFO L87 Difference]: Start difference. First operand 8715 states and 11529 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:56,303 INFO L93 Difference]: Finished difference Result 10763 states and 14299 transitions. [2021-11-23 16:49:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:49:56,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-23 16:49:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:56,315 INFO L225 Difference]: With dead ends: 10763 [2021-11-23 16:49:56,315 INFO L226 Difference]: Without dead ends: 8769 [2021-11-23 16:49:56,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:56,320 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 82 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:56,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1190 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2021-11-23 16:49:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8769 states. [2021-11-23 16:49:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8769 to 8742. [2021-11-23 16:49:57,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 1.3227319528658048) internal successors, (11562), 8741 states have internal predecessors, (11562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 11562 transitions. [2021-11-23 16:49:57,154 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 11562 transitions. Word has length 82 [2021-11-23 16:49:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:57,155 INFO L470 AbstractCegarLoop]: Abstraction has 8742 states and 11562 transitions. [2021-11-23 16:49:57,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 11562 transitions. [2021-11-23 16:49:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 16:49:57,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:57,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:57,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-11-23 16:49:57,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:57,358 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:49:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1878263487, now seen corresponding path program 1 times [2021-11-23 16:49:57,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:57,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663309582] [2021-11-23 16:49:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:57,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:57,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:57,360 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:57,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-23 16:49:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:57,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:57,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:58,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:58,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:58,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663309582] [2021-11-23 16:49:58,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663309582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:58,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:58,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:49:58,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790031789] [2021-11-23 16:49:58,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:58,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:49:58,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:58,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:49:58,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:58,206 INFO L87 Difference]: Start difference. First operand 8742 states and 11562 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:59,125 INFO L93 Difference]: Finished difference Result 9566 states and 12671 transitions. [2021-11-23 16:49:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:49:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-23 16:49:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:59,136 INFO L225 Difference]: With dead ends: 9566 [2021-11-23 16:49:59,136 INFO L226 Difference]: Without dead ends: 8742 [2021-11-23 16:49:59,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:49:59,140 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 45 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:59,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 760 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2021-11-23 16:49:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8742 states. [2021-11-23 16:49:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8742 to 8742. [2021-11-23 16:49:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 1.3226175494794645) internal successors, (11561), 8741 states have internal predecessors, (11561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 11561 transitions. [2021-11-23 16:49:59,968 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 11561 transitions. Word has length 84 [2021-11-23 16:49:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:59,968 INFO L470 AbstractCegarLoop]: Abstraction has 8742 states and 11561 transitions. [2021-11-23 16:49:59,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 11561 transitions. [2021-11-23 16:49:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 16:49:59,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:59,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:59,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-11-23 16:50:00,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:00,173 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:00,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1113027848, now seen corresponding path program 1 times [2021-11-23 16:50:00,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:00,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709887390] [2021-11-23 16:50:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:00,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:00,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:00,174 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:00,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 16:50:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:00,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:00,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:01,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:01,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:01,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709887390] [2021-11-23 16:50:01,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709887390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:01,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:01,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:50:01,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599395415] [2021-11-23 16:50:01,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:01,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:50:01,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:01,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:50:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:50:01,043 INFO L87 Difference]: Start difference. First operand 8742 states and 11561 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:02,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:02,050 INFO L93 Difference]: Finished difference Result 9539 states and 12634 transitions. [2021-11-23 16:50:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:50:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 16:50:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:02,066 INFO L225 Difference]: With dead ends: 9539 [2021-11-23 16:50:02,066 INFO L226 Difference]: Without dead ends: 8742 [2021-11-23 16:50:02,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:50:02,070 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 39 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:02,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 989 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2021-11-23 16:50:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8742 states. [2021-11-23 16:50:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8742 to 8742. [2021-11-23 16:50:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 1.3225031460931242) internal successors, (11560), 8741 states have internal predecessors, (11560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 11560 transitions. [2021-11-23 16:50:02,916 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 11560 transitions. Word has length 87 [2021-11-23 16:50:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:02,917 INFO L470 AbstractCegarLoop]: Abstraction has 8742 states and 11560 transitions. [2021-11-23 16:50:02,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 11560 transitions. [2021-11-23 16:50:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 16:50:02,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:02,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:02,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:03,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:03,121 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:03,122 INFO L85 PathProgramCache]: Analyzing trace with hash -147247801, now seen corresponding path program 1 times [2021-11-23 16:50:03,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:03,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114873475] [2021-11-23 16:50:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:03,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:03,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:03,125 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:03,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-23 16:50:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:03,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:03,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:03,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:03,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114873475] [2021-11-23 16:50:03,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114873475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:03,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:03,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:03,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058213535] [2021-11-23 16:50:03,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:03,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:03,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:03,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:03,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:03,476 INFO L87 Difference]: Start difference. First operand 8742 states and 11560 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:04,768 INFO L93 Difference]: Finished difference Result 19039 states and 25299 transitions. [2021-11-23 16:50:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:04,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-23 16:50:04,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:04,785 INFO L225 Difference]: With dead ends: 19039 [2021-11-23 16:50:04,785 INFO L226 Difference]: Without dead ends: 13125 [2021-11-23 16:50:04,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:04,793 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 263 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:04,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 675 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:50:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13125 states. [2021-11-23 16:50:05,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13125 to 13123. [2021-11-23 16:50:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13123 states, 13122 states have (on average 1.3056698673982625) internal successors, (17133), 13122 states have internal predecessors, (17133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13123 states to 13123 states and 17133 transitions. [2021-11-23 16:50:05,992 INFO L78 Accepts]: Start accepts. Automaton has 13123 states and 17133 transitions. Word has length 89 [2021-11-23 16:50:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:05,992 INFO L470 AbstractCegarLoop]: Abstraction has 13123 states and 17133 transitions. [2021-11-23 16:50:05,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 13123 states and 17133 transitions. [2021-11-23 16:50:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 16:50:05,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:05,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:06,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:06,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:06,199 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:06,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1301453078, now seen corresponding path program 1 times [2021-11-23 16:50:06,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:06,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287750000] [2021-11-23 16:50:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:06,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:06,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:06,201 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:06,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-23 16:50:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:06,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:06,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:07,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:07,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:07,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287750000] [2021-11-23 16:50:07,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287750000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:07,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:07,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:50:07,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350434850] [2021-11-23 16:50:07,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:07,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:50:07,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:50:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:50:07,395 INFO L87 Difference]: Start difference. First operand 13123 states and 17133 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:08,662 INFO L93 Difference]: Finished difference Result 14500 states and 18945 transitions. [2021-11-23 16:50:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:50:08,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-23 16:50:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:08,680 INFO L225 Difference]: With dead ends: 14500 [2021-11-23 16:50:08,680 INFO L226 Difference]: Without dead ends: 13149 [2021-11-23 16:50:08,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:50:08,686 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 41 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:08,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1391 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 355 Unchecked, 0.2s Time] [2021-11-23 16:50:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13149 states. [2021-11-23 16:50:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13149 to 13149. [2021-11-23 16:50:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13149 states, 13148 states have (on average 1.305293580772741) internal successors, (17162), 13148 states have internal predecessors, (17162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13149 states to 13149 states and 17162 transitions. [2021-11-23 16:50:09,914 INFO L78 Accepts]: Start accepts. Automaton has 13149 states and 17162 transitions. Word has length 90 [2021-11-23 16:50:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:09,914 INFO L470 AbstractCegarLoop]: Abstraction has 13149 states and 17162 transitions. [2021-11-23 16:50:09,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 13149 states and 17162 transitions. [2021-11-23 16:50:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 16:50:09,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:09,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:09,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-11-23 16:50:10,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:10,120 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:10,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1887103428, now seen corresponding path program 1 times [2021-11-23 16:50:10,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:10,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309602473] [2021-11-23 16:50:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:10,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:10,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:10,122 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:10,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 16:50:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:10,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:10,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:10,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309602473] [2021-11-23 16:50:10,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309602473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:10,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:10,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:50:10,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419108470] [2021-11-23 16:50:10,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:10,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:50:10,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:50:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:50:10,822 INFO L87 Difference]: Start difference. First operand 13149 states and 17162 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:12,542 INFO L93 Difference]: Finished difference Result 17214 states and 22522 transitions. [2021-11-23 16:50:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:50:12,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-23 16:50:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:12,559 INFO L225 Difference]: With dead ends: 17214 [2021-11-23 16:50:12,559 INFO L226 Difference]: Without dead ends: 15863 [2021-11-23 16:50:12,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:12,565 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 239 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:12,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 1305 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 383 Invalid, 0 Unknown, 300 Unchecked, 0.3s Time] [2021-11-23 16:50:12,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15863 states. [2021-11-23 16:50:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15863 to 13123. [2021-11-23 16:50:13,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13123 states, 13122 states have (on average 1.3055936595031246) internal successors, (17132), 13122 states have internal predecessors, (17132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13123 states to 13123 states and 17132 transitions. [2021-11-23 16:50:13,832 INFO L78 Accepts]: Start accepts. Automaton has 13123 states and 17132 transitions. Word has length 91 [2021-11-23 16:50:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:13,832 INFO L470 AbstractCegarLoop]: Abstraction has 13123 states and 17132 transitions. [2021-11-23 16:50:13,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 13123 states and 17132 transitions. [2021-11-23 16:50:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 16:50:13,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:13,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:13,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:14,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:14,039 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:14,039 INFO L85 PathProgramCache]: Analyzing trace with hash -512579130, now seen corresponding path program 1 times [2021-11-23 16:50:14,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:14,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119002710] [2021-11-23 16:50:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:14,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:14,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:14,041 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:14,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-23 16:50:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:14,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:50:14,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:14,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:14,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:14,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119002710] [2021-11-23 16:50:14,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119002710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:14,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:14,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:50:14,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549366675] [2021-11-23 16:50:14,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:14,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:50:14,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:50:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:50:14,617 INFO L87 Difference]: Start difference. First operand 13123 states and 17132 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:15,886 INFO L93 Difference]: Finished difference Result 14494 states and 18939 transitions. [2021-11-23 16:50:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:50:15,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-23 16:50:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:15,901 INFO L225 Difference]: With dead ends: 14494 [2021-11-23 16:50:15,901 INFO L226 Difference]: Without dead ends: 13144 [2021-11-23 16:50:15,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:50:15,905 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 65 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:15,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1137 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-11-23 16:50:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13144 states. [2021-11-23 16:50:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13144 to 13126. [2021-11-23 16:50:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13126 states, 13125 states have (on average 1.3055238095238095) internal successors, (17135), 13125 states have internal predecessors, (17135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13126 states to 13126 states and 17135 transitions. [2021-11-23 16:50:17,078 INFO L78 Accepts]: Start accepts. Automaton has 13126 states and 17135 transitions. Word has length 91 [2021-11-23 16:50:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:17,079 INFO L470 AbstractCegarLoop]: Abstraction has 13126 states and 17135 transitions. [2021-11-23 16:50:17,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 13126 states and 17135 transitions. [2021-11-23 16:50:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 16:50:17,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:17,086 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:17,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:17,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:17,286 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash -832253789, now seen corresponding path program 1 times [2021-11-23 16:50:17,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:17,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334491087] [2021-11-23 16:50:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:17,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:17,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:17,289 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:17,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-23 16:50:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:17,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:17,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:17,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334491087] [2021-11-23 16:50:17,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334491087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:17,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:17,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:17,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017383871] [2021-11-23 16:50:17,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:17,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:17,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:17,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:17,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:17,633 INFO L87 Difference]: Start difference. First operand 13126 states and 17135 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:18,714 INFO L93 Difference]: Finished difference Result 23490 states and 30791 transitions. [2021-11-23 16:50:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:18,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-23 16:50:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:18,728 INFO L225 Difference]: With dead ends: 23490 [2021-11-23 16:50:18,728 INFO L226 Difference]: Without dead ends: 10824 [2021-11-23 16:50:18,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:18,742 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 168 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:18,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 717 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:50:18,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10824 states. [2021-11-23 16:50:19,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10824 to 10788. [2021-11-23 16:50:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10788 states, 10787 states have (on average 1.2942430703624734) internal successors, (13961), 10787 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:19,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10788 states to 10788 states and 13961 transitions. [2021-11-23 16:50:19,792 INFO L78 Accepts]: Start accepts. Automaton has 10788 states and 13961 transitions. Word has length 92 [2021-11-23 16:50:19,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:19,792 INFO L470 AbstractCegarLoop]: Abstraction has 10788 states and 13961 transitions. [2021-11-23 16:50:19,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:19,793 INFO L276 IsEmpty]: Start isEmpty. Operand 10788 states and 13961 transitions. [2021-11-23 16:50:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 16:50:19,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:19,796 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:19,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:19,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:19,997 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash -997443330, now seen corresponding path program 1 times [2021-11-23 16:50:19,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:19,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715895087] [2021-11-23 16:50:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:19,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:19,998 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:19,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-23 16:50:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:20,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:20,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:21,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:21,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715895087] [2021-11-23 16:50:21,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715895087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1492894193] [2021-11-23 16:50:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:21,488 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:21,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:21,490 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:21,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-23 16:50:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:21,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:21,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:22,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:23,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1492894193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:23,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218635274] [2021-11-23 16:50:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:23,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:23,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:23,115 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:23,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-23 16:50:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:24,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:24,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218635274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:24,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:24,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2021-11-23 16:50:24,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257437359] [2021-11-23 16:50:24,871 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:24,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 16:50:24,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:24,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 16:50:24,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:50:24,873 INFO L87 Difference]: Start difference. First operand 10788 states and 13961 transitions. Second operand has 14 states, 14 states have (on average 12.428571428571429) internal successors, (174), 13 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:26,783 INFO L93 Difference]: Finished difference Result 17537 states and 22573 transitions. [2021-11-23 16:50:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:50:26,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.428571428571429) internal successors, (174), 13 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-23 16:50:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:26,797 INFO L225 Difference]: With dead ends: 17537 [2021-11-23 16:50:26,797 INFO L226 Difference]: Without dead ends: 12157 [2021-11-23 16:50:26,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:50:26,804 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 244 mSDsluCounter, 2910 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 737 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:26,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 3334 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 682 Invalid, 0 Unknown, 737 Unchecked, 0.4s Time] [2021-11-23 16:50:26,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12157 states. [2021-11-23 16:50:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12157 to 10869. [2021-11-23 16:50:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10869 states, 10868 states have (on average 1.2927861612072138) internal successors, (14050), 10868 states have internal predecessors, (14050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10869 states to 10869 states and 14050 transitions. [2021-11-23 16:50:27,875 INFO L78 Accepts]: Start accepts. Automaton has 10869 states and 14050 transitions. Word has length 92 [2021-11-23 16:50:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:27,876 INFO L470 AbstractCegarLoop]: Abstraction has 10869 states and 14050 transitions. [2021-11-23 16:50:27,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.428571428571429) internal successors, (174), 13 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10869 states and 14050 transitions. [2021-11-23 16:50:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 16:50:27,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:27,881 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:27,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2021-11-23 16:50:28,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-23 16:50:28,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2021-11-23 16:50:28,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:28,496 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:28,497 INFO L85 PathProgramCache]: Analyzing trace with hash -916828914, now seen corresponding path program 1 times [2021-11-23 16:50:28,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:28,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270306006] [2021-11-23 16:50:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:28,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:28,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:28,499 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:28,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-23 16:50:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:28,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:28,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:29,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:29,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:29,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270306006] [2021-11-23 16:50:29,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270306006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:29,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:29,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:50:29,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242029125] [2021-11-23 16:50:29,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:29,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:50:29,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:29,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:50:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:50:29,435 INFO L87 Difference]: Start difference. First operand 10869 states and 14050 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:30,623 INFO L93 Difference]: Finished difference Result 16223 states and 21032 transitions. [2021-11-23 16:50:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:50:30,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-23 16:50:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:30,635 INFO L225 Difference]: With dead ends: 16223 [2021-11-23 16:50:30,635 INFO L226 Difference]: Without dead ends: 10881 [2021-11-23 16:50:30,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:50:30,641 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 42 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:30,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 852 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2021-11-23 16:50:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-11-23 16:50:31,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 10881. [2021-11-23 16:50:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10881 states, 10880 states have (on average 1.2924632352941177) internal successors, (14062), 10880 states have internal predecessors, (14062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10881 states to 10881 states and 14062 transitions. [2021-11-23 16:50:31,620 INFO L78 Accepts]: Start accepts. Automaton has 10881 states and 14062 transitions. Word has length 92 [2021-11-23 16:50:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:31,620 INFO L470 AbstractCegarLoop]: Abstraction has 10881 states and 14062 transitions. [2021-11-23 16:50:31,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 10881 states and 14062 transitions. [2021-11-23 16:50:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 16:50:31,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:31,623 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:31,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:31,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:31,838 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:31,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1749488109, now seen corresponding path program 1 times [2021-11-23 16:50:31,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:31,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573655337] [2021-11-23 16:50:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:31,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:31,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:31,840 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:31,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-23 16:50:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:32,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:32,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:50:32,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:32,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573655337] [2021-11-23 16:50:32,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573655337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:32,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:32,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:50:32,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246324539] [2021-11-23 16:50:32,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:32,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:50:32,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:50:32,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:50:32,538 INFO L87 Difference]: Start difference. First operand 10881 states and 14062 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:33,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:33,759 INFO L93 Difference]: Finished difference Result 16230 states and 21038 transitions. [2021-11-23 16:50:33,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:50:33,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-23 16:50:33,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:33,773 INFO L225 Difference]: With dead ends: 16230 [2021-11-23 16:50:33,773 INFO L226 Difference]: Without dead ends: 10881 [2021-11-23 16:50:33,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:33,779 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 34 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:33,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 662 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-11-23 16:50:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-11-23 16:50:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 10881. [2021-11-23 16:50:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10881 states, 10880 states have (on average 1.2923713235294119) internal successors, (14061), 10880 states have internal predecessors, (14061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10881 states to 10881 states and 14061 transitions. [2021-11-23 16:50:34,828 INFO L78 Accepts]: Start accepts. Automaton has 10881 states and 14061 transitions. Word has length 92 [2021-11-23 16:50:34,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:34,828 INFO L470 AbstractCegarLoop]: Abstraction has 10881 states and 14061 transitions. [2021-11-23 16:50:34,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 10881 states and 14061 transitions. [2021-11-23 16:50:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 16:50:34,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:34,832 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:34,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-11-23 16:50:35,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:35,035 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1425124433, now seen corresponding path program 1 times [2021-11-23 16:50:35,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:35,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953121952] [2021-11-23 16:50:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:35,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:35,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:35,038 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:35,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-11-23 16:50:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:35,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:50:35,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:35,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:35,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953121952] [2021-11-23 16:50:35,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953121952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:35,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:35,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:50:35,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123924660] [2021-11-23 16:50:35,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:35,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:50:35,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:50:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:35,549 INFO L87 Difference]: Start difference. First operand 10881 states and 14061 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:37,822 INFO L93 Difference]: Finished difference Result 24882 states and 32077 transitions. [2021-11-23 16:50:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:50:37,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 16:50:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:37,842 INFO L225 Difference]: With dead ends: 24882 [2021-11-23 16:50:37,843 INFO L226 Difference]: Without dead ends: 14539 [2021-11-23 16:50:37,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:50:37,853 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 1481 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:37,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 634 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:50:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14539 states. [2021-11-23 16:50:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14539 to 10624. [2021-11-23 16:50:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10624 states, 10623 states have (on average 1.2608491010072485) internal successors, (13394), 10623 states have internal predecessors, (13394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10624 states to 10624 states and 13394 transitions. [2021-11-23 16:50:39,276 INFO L78 Accepts]: Start accepts. Automaton has 10624 states and 13394 transitions. Word has length 93 [2021-11-23 16:50:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:39,276 INFO L470 AbstractCegarLoop]: Abstraction has 10624 states and 13394 transitions. [2021-11-23 16:50:39,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 10624 states and 13394 transitions. [2021-11-23 16:50:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 16:50:39,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:39,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:39,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:39,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:39,480 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash -282579005, now seen corresponding path program 1 times [2021-11-23 16:50:39,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:39,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804410903] [2021-11-23 16:50:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:39,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:39,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:39,483 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:39,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-23 16:50:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:39,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:39,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:39,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:39,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:39,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804410903] [2021-11-23 16:50:39,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804410903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:39,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:39,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:39,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083983574] [2021-11-23 16:50:39,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:39,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:39,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:39,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:39,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:39,885 INFO L87 Difference]: Start difference. First operand 10624 states and 13394 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:40,650 INFO L93 Difference]: Finished difference Result 15722 states and 19930 transitions. [2021-11-23 16:50:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 16:50:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:40,658 INFO L225 Difference]: With dead ends: 15722 [2021-11-23 16:50:40,658 INFO L226 Difference]: Without dead ends: 5678 [2021-11-23 16:50:40,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:40,667 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 175 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:40,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 690 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:50:40,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2021-11-23 16:50:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 5676. [2021-11-23 16:50:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5676 states, 5675 states have (on average 1.2491629955947137) internal successors, (7089), 5675 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5676 states to 5676 states and 7089 transitions. [2021-11-23 16:50:41,486 INFO L78 Accepts]: Start accepts. Automaton has 5676 states and 7089 transitions. Word has length 93 [2021-11-23 16:50:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:41,486 INFO L470 AbstractCegarLoop]: Abstraction has 5676 states and 7089 transitions. [2021-11-23 16:50:41,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 5676 states and 7089 transitions. [2021-11-23 16:50:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 16:50:41,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:41,489 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:41,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-11-23 16:50:41,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:41,697 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1679194756, now seen corresponding path program 1 times [2021-11-23 16:50:41,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:41,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350077898] [2021-11-23 16:50:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:41,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:41,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:41,699 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:41,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-23 16:50:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:41,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:42,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:42,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:42,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350077898] [2021-11-23 16:50:42,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350077898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:42,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1523664111] [2021-11-23 16:50:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:42,620 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:42,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:42,636 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:42,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-11-23 16:50:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:43,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:43,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:43,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1523664111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:43,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455077625] [2021-11-23 16:50:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:43,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:43,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:43,825 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:43,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-23 16:50:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:44,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:44,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:44,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:44,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455077625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:44,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:44,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-23 16:50:44,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876896167] [2021-11-23 16:50:44,737 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:44,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:50:44,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:44,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:50:44,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:50:44,738 INFO L87 Difference]: Start difference. First operand 5676 states and 7089 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:45,878 INFO L93 Difference]: Finished difference Result 12761 states and 16146 transitions. [2021-11-23 16:50:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:50:45,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 16:50:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:45,890 INFO L225 Difference]: With dead ends: 12761 [2021-11-23 16:50:45,890 INFO L226 Difference]: Without dead ends: 7665 [2021-11-23 16:50:45,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 544 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:50:45,899 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 854 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:45,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 2146 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2021-11-23 16:50:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7665 states. [2021-11-23 16:50:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7665 to 7150. [2021-11-23 16:50:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7150 states, 7149 states have (on average 1.2509441879983214) internal successors, (8943), 7149 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7150 states to 7150 states and 8943 transitions. [2021-11-23 16:50:46,899 INFO L78 Accepts]: Start accepts. Automaton has 7150 states and 8943 transitions. Word has length 93 [2021-11-23 16:50:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:46,899 INFO L470 AbstractCegarLoop]: Abstraction has 7150 states and 8943 transitions. [2021-11-23 16:50:46,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7150 states and 8943 transitions. [2021-11-23 16:50:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 16:50:46,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:46,902 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:46,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:47,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-11-23 16:50:47,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:47,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:47,503 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash 924672782, now seen corresponding path program 1 times [2021-11-23 16:50:47,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:47,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612139411] [2021-11-23 16:50:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:47,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:47,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:47,507 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:47,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-23 16:50:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:50:47,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:48,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:48,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:48,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612139411] [2021-11-23 16:50:48,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612139411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:48,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:48,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:50:48,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601253784] [2021-11-23 16:50:48,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:48,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:50:48,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:48,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:50:48,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:48,088 INFO L87 Difference]: Start difference. First operand 7150 states and 8943 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:49,745 INFO L93 Difference]: Finished difference Result 13720 states and 17204 transitions. [2021-11-23 16:50:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:50:49,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-23 16:50:49,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:49,775 INFO L225 Difference]: With dead ends: 13720 [2021-11-23 16:50:49,791 INFO L226 Difference]: Without dead ends: 7603 [2021-11-23 16:50:49,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:50:49,811 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 909 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:49,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 674 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:50:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7603 states. [2021-11-23 16:50:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7603 to 6438. [2021-11-23 16:50:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 6437 states have (on average 1.2249495106416033) internal successors, (7885), 6437 states have internal predecessors, (7885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 7885 transitions. [2021-11-23 16:50:50,820 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 7885 transitions. Word has length 96 [2021-11-23 16:50:50,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:50,820 INFO L470 AbstractCegarLoop]: Abstraction has 6438 states and 7885 transitions. [2021-11-23 16:50:50,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:50,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 7885 transitions. [2021-11-23 16:50:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 16:50:50,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:50,823 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:50,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:51,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:51,024 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash -716112831, now seen corresponding path program 1 times [2021-11-23 16:50:51,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:51,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599163345] [2021-11-23 16:50:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:51,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:51,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:51,026 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:51,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-11-23 16:50:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:51,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:51,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:51,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:51,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:51,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599163345] [2021-11-23 16:50:51,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599163345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:51,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:51,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:51,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227700937] [2021-11-23 16:50:51,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:51,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:51,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:51,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:51,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:51,471 INFO L87 Difference]: Start difference. First operand 6438 states and 7885 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:52,448 INFO L93 Difference]: Finished difference Result 9512 states and 11701 transitions. [2021-11-23 16:50:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-23 16:50:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:52,456 INFO L225 Difference]: With dead ends: 9512 [2021-11-23 16:50:52,456 INFO L226 Difference]: Without dead ends: 6058 [2021-11-23 16:50:52,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:52,460 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 126 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:52,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 710 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:50:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2021-11-23 16:50:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 6056. [2021-11-23 16:50:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6056 states, 6055 states have (on average 1.2203137902559869) internal successors, (7389), 6055 states have internal predecessors, (7389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 7389 transitions. [2021-11-23 16:50:53,338 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 7389 transitions. Word has length 96 [2021-11-23 16:50:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:53,339 INFO L470 AbstractCegarLoop]: Abstraction has 6056 states and 7389 transitions. [2021-11-23 16:50:53,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 7389 transitions. [2021-11-23 16:50:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 16:50:53,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:53,341 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:53,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:53,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:53,542 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:53,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1325387672, now seen corresponding path program 1 times [2021-11-23 16:50:53,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:53,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18228494] [2021-11-23 16:50:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:53,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:53,546 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:53,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-23 16:50:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:50:53,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:53,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18228494] [2021-11-23 16:50:53,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18228494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:53,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:53,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:53,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264096794] [2021-11-23 16:50:53,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:53,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:53,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:53,967 INFO L87 Difference]: Start difference. First operand 6056 states and 7389 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:54,836 INFO L93 Difference]: Finished difference Result 8124 states and 9935 transitions. [2021-11-23 16:50:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:54,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 16:50:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:54,842 INFO L225 Difference]: With dead ends: 8124 [2021-11-23 16:50:54,843 INFO L226 Difference]: Without dead ends: 5984 [2021-11-23 16:50:54,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:54,845 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 150 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:54,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 726 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:50:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5984 states. [2021-11-23 16:50:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5984 to 5982. [2021-11-23 16:50:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5982 states, 5981 states have (on average 1.2104999164019394) internal successors, (7240), 5981 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5982 states to 5982 states and 7240 transitions. [2021-11-23 16:50:55,679 INFO L78 Accepts]: Start accepts. Automaton has 5982 states and 7240 transitions. Word has length 99 [2021-11-23 16:50:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:55,680 INFO L470 AbstractCegarLoop]: Abstraction has 5982 states and 7240 transitions. [2021-11-23 16:50:55,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5982 states and 7240 transitions. [2021-11-23 16:50:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 16:50:55,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:55,682 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:55,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:55,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:55,883 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash -753421149, now seen corresponding path program 1 times [2021-11-23 16:50:55,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:55,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730679484] [2021-11-23 16:50:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:55,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:55,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:55,886 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:55,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-23 16:50:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:56,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:50:56,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:56,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:56,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730679484] [2021-11-23 16:50:56,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730679484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:56,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:56,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:56,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048867911] [2021-11-23 16:50:56,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:56,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:56,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:56,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:56,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:56,306 INFO L87 Difference]: Start difference. First operand 5982 states and 7240 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:57,198 INFO L93 Difference]: Finished difference Result 8409 states and 10224 transitions. [2021-11-23 16:50:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-23 16:50:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:57,204 INFO L225 Difference]: With dead ends: 8409 [2021-11-23 16:50:57,204 INFO L226 Difference]: Without dead ends: 5490 [2021-11-23 16:50:57,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:57,206 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 149 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:57,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 710 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:50:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2021-11-23 16:50:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 5488. [2021-11-23 16:50:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 5487 states have (on average 1.1988336067067615) internal successors, (6578), 5487 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 6578 transitions. [2021-11-23 16:50:58,049 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 6578 transitions. Word has length 101 [2021-11-23 16:50:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:58,050 INFO L470 AbstractCegarLoop]: Abstraction has 5488 states and 6578 transitions. [2021-11-23 16:50:58,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 6578 transitions. [2021-11-23 16:50:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 16:50:58,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:58,052 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:50:58,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:58,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:58,253 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:50:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash 737372514, now seen corresponding path program 1 times [2021-11-23 16:50:58,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:58,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84670037] [2021-11-23 16:50:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:58,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:58,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:58,255 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:58,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-11-23 16:50:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:59,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:59,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:59,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84670037] [2021-11-23 16:50:59,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84670037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:59,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:59,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:50:59,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587062386] [2021-11-23 16:50:59,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:59,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:50:59,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:59,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:50:59,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:50:59,397 INFO L87 Difference]: Start difference. First operand 5488 states and 6578 transitions. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:00,418 INFO L93 Difference]: Finished difference Result 6171 states and 7419 transitions. [2021-11-23 16:51:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:51:00,418 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-23 16:51:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:00,424 INFO L225 Difference]: With dead ends: 6171 [2021-11-23 16:51:00,425 INFO L226 Difference]: Without dead ends: 5500 [2021-11-23 16:51:00,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:51:00,433 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 47 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 782 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:00,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 2062 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 782 Unchecked, 0.2s Time] [2021-11-23 16:51:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5500 states. [2021-11-23 16:51:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5500 to 5500. [2021-11-23 16:51:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5500 states, 5499 states have (on average 1.198399709038007) internal successors, (6590), 5499 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5500 states to 5500 states and 6590 transitions. [2021-11-23 16:51:01,291 INFO L78 Accepts]: Start accepts. Automaton has 5500 states and 6590 transitions. Word has length 103 [2021-11-23 16:51:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:01,291 INFO L470 AbstractCegarLoop]: Abstraction has 5500 states and 6590 transitions. [2021-11-23 16:51:01,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 5500 states and 6590 transitions. [2021-11-23 16:51:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 16:51:01,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:01,293 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:51:01,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:01,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:01,494 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:51:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:01,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1788821603, now seen corresponding path program 1 times [2021-11-23 16:51:01,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:01,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559036229] [2021-11-23 16:51:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:01,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:01,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:01,496 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:01,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-11-23 16:51:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:51:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:51:02,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:02,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:02,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559036229] [2021-11-23 16:51:02,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559036229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:02,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:02,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:51:02,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429003529] [2021-11-23 16:51:02,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:02,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:51:02,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:51:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:51:02,464 INFO L87 Difference]: Start difference. First operand 5500 states and 6590 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:03,728 INFO L93 Difference]: Finished difference Result 7500 states and 9064 transitions. [2021-11-23 16:51:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:51:03,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-23 16:51:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:03,738 INFO L225 Difference]: With dead ends: 7500 [2021-11-23 16:51:03,738 INFO L226 Difference]: Without dead ends: 6739 [2021-11-23 16:51:03,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:51:03,741 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 228 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:03,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 941 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 348 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2021-11-23 16:51:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6739 states. [2021-11-23 16:51:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6739 to 6201. [2021-11-23 16:51:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6201 states, 6200 states have (on average 1.201290322580645) internal successors, (7448), 6200 states have internal predecessors, (7448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6201 states to 6201 states and 7448 transitions. [2021-11-23 16:51:04,700 INFO L78 Accepts]: Start accepts. Automaton has 6201 states and 7448 transitions. Word has length 103 [2021-11-23 16:51:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:04,700 INFO L470 AbstractCegarLoop]: Abstraction has 6201 states and 7448 transitions. [2021-11-23 16:51:04,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 6201 states and 7448 transitions. [2021-11-23 16:51:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 16:51:04,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:04,703 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:51:04,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:04,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:04,904 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:51:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash 705266961, now seen corresponding path program 1 times [2021-11-23 16:51:04,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:04,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096767722] [2021-11-23 16:51:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:04,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:04,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:04,907 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:04,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-23 16:51:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:05,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:05,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:06,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:06,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:06,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096767722] [2021-11-23 16:51:06,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096767722] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:06,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1434555603] [2021-11-23 16:51:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:06,768 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:06,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:06,771 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:06,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2021-11-23 16:51:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:07,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:07,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:08,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:08,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1434555603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883976580] [2021-11-23 16:51:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:08,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:08,866 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:08,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-23 16:51:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:09,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:10,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:11,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883976580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:11,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:11,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:51:11,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378387320] [2021-11-23 16:51:11,089 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:11,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:51:11,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:11,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:51:11,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:51:11,091 INFO L87 Difference]: Start difference. First operand 6201 states and 7448 transitions. Second operand has 16 states, 16 states have (on average 12.125) internal successors, (194), 15 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:14,562 INFO L93 Difference]: Finished difference Result 17373 states and 21032 transitions. [2021-11-23 16:51:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 16:51:14,562 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.125) internal successors, (194), 15 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-23 16:51:14,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:14,579 INFO L225 Difference]: With dead ends: 17373 [2021-11-23 16:51:14,579 INFO L226 Difference]: Without dead ends: 13259 [2021-11-23 16:51:14,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-11-23 16:51:14,585 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 769 mSDsluCounter, 3280 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 3788 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:14,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 3788 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1546 Invalid, 0 Unknown, 683 Unchecked, 1.1s Time] [2021-11-23 16:51:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13259 states. [2021-11-23 16:51:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13259 to 10507. [2021-11-23 16:51:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10507 states, 10506 states have (on average 1.2045497810774795) internal successors, (12655), 10506 states have internal predecessors, (12655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10507 states to 10507 states and 12655 transitions. [2021-11-23 16:51:16,184 INFO L78 Accepts]: Start accepts. Automaton has 10507 states and 12655 transitions. Word has length 105 [2021-11-23 16:51:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:16,184 INFO L470 AbstractCegarLoop]: Abstraction has 10507 states and 12655 transitions. [2021-11-23 16:51:16,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.125) internal successors, (194), 15 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:16,185 INFO L276 IsEmpty]: Start isEmpty. Operand 10507 states and 12655 transitions. [2021-11-23 16:51:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:51:16,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:16,187 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:51:16,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:16,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:16,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-11-23 16:51:16,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:16,788 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:51:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1164677417, now seen corresponding path program 1 times [2021-11-23 16:51:16,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:16,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588582582] [2021-11-23 16:51:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:16,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:16,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:16,790 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:16,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-23 16:51:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:17,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:51:17,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:51:18,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:18,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:18,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588582582] [2021-11-23 16:51:18,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588582582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:18,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:18,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:51:18,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833005881] [2021-11-23 16:51:18,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:18,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:51:18,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:18,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:51:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:51:18,286 INFO L87 Difference]: Start difference. First operand 10507 states and 12655 transitions. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:19,958 INFO L93 Difference]: Finished difference Result 12917 states and 15589 transitions. [2021-11-23 16:51:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:51:19,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-23 16:51:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:20,063 INFO L225 Difference]: With dead ends: 12917 [2021-11-23 16:51:20,063 INFO L226 Difference]: Without dead ends: 11754 [2021-11-23 16:51:20,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:51:20,067 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 102 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:20,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1397 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 375 Unchecked, 0.0s Time] [2021-11-23 16:51:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11754 states. [2021-11-23 16:51:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11754 to 11190. [2021-11-23 16:51:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.2062740191259274) internal successors, (13497), 11189 states have internal predecessors, (13497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 13497 transitions. [2021-11-23 16:51:21,705 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 13497 transitions. Word has length 106 [2021-11-23 16:51:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:21,706 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 13497 transitions. [2021-11-23 16:51:21,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 13497 transitions. [2021-11-23 16:51:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:51:21,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:21,709 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:51:21,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:21,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:21,910 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:51:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:21,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2078840790, now seen corresponding path program 1 times [2021-11-23 16:51:21,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:21,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668045062] [2021-11-23 16:51:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:21,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:21,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:21,912 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:21,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-11-23 16:51:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:22,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:22,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:23,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:23,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668045062] [2021-11-23 16:51:23,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668045062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1567545401] [2021-11-23 16:51:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:23,822 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:23,824 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:23,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2021-11-23 16:51:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:24,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:24,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:25,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:26,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1567545401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:26,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147470133] [2021-11-23 16:51:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:26,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:26,083 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:26,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-23 16:51:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:26,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:26,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:27,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:28,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147470133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:28,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:28,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:51:28,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014767932] [2021-11-23 16:51:28,163 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:28,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:51:28,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:28,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:51:28,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:51:28,164 INFO L87 Difference]: Start difference. First operand 11190 states and 13497 transitions. Second operand has 16 states, 16 states have (on average 12.4375) internal successors, (199), 15 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:30,932 INFO L93 Difference]: Finished difference Result 18546 states and 22400 transitions. [2021-11-23 16:51:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 16:51:30,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.4375) internal successors, (199), 15 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-23 16:51:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:30,950 INFO L225 Difference]: With dead ends: 18546 [2021-11-23 16:51:30,950 INFO L226 Difference]: Without dead ends: 14870 [2021-11-23 16:51:30,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:51:30,959 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 267 mSDsluCounter, 3200 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 3642 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 682 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:30,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 3642 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 529 Invalid, 0 Unknown, 682 Unchecked, 0.4s Time] [2021-11-23 16:51:30,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14870 states. [2021-11-23 16:51:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14870 to 11289. [2021-11-23 16:51:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11289 states, 11288 states have (on average 1.2062367115520907) internal successors, (13616), 11288 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11289 states to 11289 states and 13616 transitions. [2021-11-23 16:51:32,650 INFO L78 Accepts]: Start accepts. Automaton has 11289 states and 13616 transitions. Word has length 106 [2021-11-23 16:51:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:32,650 INFO L470 AbstractCegarLoop]: Abstraction has 11289 states and 13616 transitions. [2021-11-23 16:51:32,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.4375) internal successors, (199), 15 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 11289 states and 13616 transitions. [2021-11-23 16:51:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:51:32,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:32,654 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:51:32,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-11-23 16:51:32,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2021-11-23 16:51:33,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (81)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:33,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:33,256 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:51:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1029448664, now seen corresponding path program 1 times [2021-11-23 16:51:33,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:33,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191552190] [2021-11-23 16:51:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:33,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:33,258 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:33,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-11-23 16:51:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:33,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:51:33,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 16:51:34,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:34,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191552190] [2021-11-23 16:51:34,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191552190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:34,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:34,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:51:34,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257863925] [2021-11-23 16:51:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:34,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:51:34,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:51:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:51:34,088 INFO L87 Difference]: Start difference. First operand 11289 states and 13616 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:36,016 INFO L93 Difference]: Finished difference Result 12352 states and 14913 transitions. [2021-11-23 16:51:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:51:36,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-23 16:51:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:36,033 INFO L225 Difference]: With dead ends: 12352 [2021-11-23 16:51:36,033 INFO L226 Difference]: Without dead ends: 11104 [2021-11-23 16:51:36,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:51:36,038 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 43 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:36,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 813 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 296 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2021-11-23 16:51:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11104 states. [2021-11-23 16:51:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11104 to 11104. [2021-11-23 16:51:37,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11104 states, 11103 states have (on average 1.2060704314149329) internal successors, (13391), 11103 states have internal predecessors, (13391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11104 states to 11104 states and 13391 transitions. [2021-11-23 16:51:37,825 INFO L78 Accepts]: Start accepts. Automaton has 11104 states and 13391 transitions. Word has length 106 [2021-11-23 16:51:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:37,825 INFO L470 AbstractCegarLoop]: Abstraction has 11104 states and 13391 transitions. [2021-11-23 16:51:37,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11104 states and 13391 transitions. [2021-11-23 16:51:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:51:37,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:37,828 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:51:37,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:38,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:38,029 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:51:38,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:38,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1927848078, now seen corresponding path program 1 times [2021-11-23 16:51:38,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:38,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515198023] [2021-11-23 16:51:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:38,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:38,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:38,031 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:38,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-11-23 16:51:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:51:38,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 16:51:39,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:39,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:39,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515198023] [2021-11-23 16:51:39,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515198023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:39,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:39,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:51:39,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384123593] [2021-11-23 16:51:39,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:39,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:51:39,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:39,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:51:39,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:51:39,405 INFO L87 Difference]: Start difference. First operand 11104 states and 13391 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:41,863 INFO L93 Difference]: Finished difference Result 16692 states and 20269 transitions. [2021-11-23 16:51:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:51:41,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-23 16:51:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:41,883 INFO L225 Difference]: With dead ends: 16692 [2021-11-23 16:51:41,883 INFO L226 Difference]: Without dead ends: 14294 [2021-11-23 16:51:41,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:51:41,889 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 250 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:41,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 1262 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 464 Unchecked, 0.2s Time] [2021-11-23 16:51:41,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14294 states. [2021-11-23 16:51:43,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14294 to 12256. [2021-11-23 16:51:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12256 states, 12255 states have (on average 1.208078335373317) internal successors, (14805), 12255 states have internal predecessors, (14805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12256 states to 12256 states and 14805 transitions. [2021-11-23 16:51:43,911 INFO L78 Accepts]: Start accepts. Automaton has 12256 states and 14805 transitions. Word has length 106 [2021-11-23 16:51:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:43,911 INFO L470 AbstractCegarLoop]: Abstraction has 12256 states and 14805 transitions. [2021-11-23 16:51:43,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 12256 states and 14805 transitions. [2021-11-23 16:51:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:51:43,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:43,915 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:51:43,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:44,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:44,115 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:51:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash 468588913, now seen corresponding path program 1 times [2021-11-23 16:51:44,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:44,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960594951] [2021-11-23 16:51:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:44,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:44,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:44,117 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:44,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-11-23 16:51:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:44,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:45,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:45,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:45,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960594951] [2021-11-23 16:51:45,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960594951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:45,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:45,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:51:45,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589655364] [2021-11-23 16:51:45,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:45,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:51:45,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:51:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:51:45,289 INFO L87 Difference]: Start difference. First operand 12256 states and 14805 transitions. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:47,514 INFO L93 Difference]: Finished difference Result 15555 states and 18868 transitions. [2021-11-23 16:51:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:51:47,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-23 16:51:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:47,554 INFO L225 Difference]: With dead ends: 15555 [2021-11-23 16:51:47,554 INFO L226 Difference]: Without dead ends: 12276 [2021-11-23 16:51:47,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:51:47,560 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 49 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:47,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1864 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 664 Unchecked, 0.2s Time] [2021-11-23 16:51:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2021-11-23 16:51:49,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 12276. [2021-11-23 16:51:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12276 states, 12275 states have (on average 1.2077393075356415) internal successors, (14825), 12275 states have internal predecessors, (14825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12276 states to 12276 states and 14825 transitions. [2021-11-23 16:51:49,604 INFO L78 Accepts]: Start accepts. Automaton has 12276 states and 14825 transitions. Word has length 106 [2021-11-23 16:51:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:49,604 INFO L470 AbstractCegarLoop]: Abstraction has 12276 states and 14825 transitions. [2021-11-23 16:51:49,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 12276 states and 14825 transitions. [2021-11-23 16:51:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:51:49,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:49,612 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:51:49,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:49,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:49,825 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:51:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:49,826 INFO L85 PathProgramCache]: Analyzing trace with hash -913817183, now seen corresponding path program 1 times [2021-11-23 16:51:49,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:49,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278948135] [2021-11-23 16:51:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:49,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:49,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:49,827 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:49,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2021-11-23 16:51:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:50,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:51:50,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:50,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:50,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:50,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278948135] [2021-11-23 16:51:50,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278948135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:50,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [120556419] [2021-11-23 16:51:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:50,660 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:50,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:50,661 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:50,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2021-11-23 16:51:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:51,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:51:51,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:51,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:51,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [120556419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:51,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810166533] [2021-11-23 16:51:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:51,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:51,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:51,660 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:51,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-23 16:51:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:51,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:51:51,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:52,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:52,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810166533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:52,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:52,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 18 [2021-11-23 16:51:52,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262942236] [2021-11-23 16:51:52,760 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:52,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 16:51:52,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:52,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 16:51:52,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:51:52,761 INFO L87 Difference]: Start difference. First operand 12276 states and 14825 transitions. Second operand has 18 states, 18 states have (on average 21.38888888888889) internal successors, (385), 18 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:58,751 INFO L93 Difference]: Finished difference Result 27047 states and 32458 transitions. [2021-11-23 16:51:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 16:51:58,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.38888888888889) internal successors, (385), 18 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-23 16:51:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:58,787 INFO L225 Difference]: With dead ends: 27047 [2021-11-23 16:51:58,787 INFO L226 Difference]: Without dead ends: 20225 [2021-11-23 16:51:58,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 615 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=573, Invalid=2619, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 16:51:58,797 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 3214 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3214 SdHoareTripleChecker+Valid, 2301 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:58,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3214 Valid, 2301 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1381 Invalid, 0 Unknown, 303 Unchecked, 1.2s Time] [2021-11-23 16:51:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20225 states. [2021-11-23 16:52:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20225 to 13964. [2021-11-23 16:52:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13964 states, 13963 states have (on average 1.202964978872735) internal successors, (16797), 13963 states have internal predecessors, (16797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13964 states to 13964 states and 16797 transitions. [2021-11-23 16:52:01,465 INFO L78 Accepts]: Start accepts. Automaton has 13964 states and 16797 transitions. Word has length 106 [2021-11-23 16:52:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:01,465 INFO L470 AbstractCegarLoop]: Abstraction has 13964 states and 16797 transitions. [2021-11-23 16:52:01,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.38888888888889) internal successors, (385), 18 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 13964 states and 16797 transitions. [2021-11-23 16:52:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 16:52:01,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:01,469 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:52:01,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-11-23 16:52:01,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (86)] Ended with exit code 0 [2021-11-23 16:52:01,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (87)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:02,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:02,070 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:52:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1614463674, now seen corresponding path program 1 times [2021-11-23 16:52:02,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:02,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999864382] [2021-11-23 16:52:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:02,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:02,072 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:02,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2021-11-23 16:52:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 16:52:02,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:02,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:02,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999864382] [2021-11-23 16:52:02,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999864382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:02,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:02,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:02,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400612856] [2021-11-23 16:52:02,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:02,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:02,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:02,502 INFO L87 Difference]: Start difference. First operand 13964 states and 16797 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:05,084 INFO L93 Difference]: Finished difference Result 24512 states and 29652 transitions. [2021-11-23 16:52:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:05,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-23 16:52:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:05,105 INFO L225 Difference]: With dead ends: 24512 [2021-11-23 16:52:05,105 INFO L226 Difference]: Without dead ends: 13855 [2021-11-23 16:52:05,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:05,115 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 338 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:05,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 310 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:52:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13855 states. [2021-11-23 16:52:07,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13855 to 13841. [2021-11-23 16:52:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13841 states, 13840 states have (on average 1.1890173410404625) internal successors, (16456), 13840 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13841 states to 13841 states and 16456 transitions. [2021-11-23 16:52:07,386 INFO L78 Accepts]: Start accepts. Automaton has 13841 states and 16456 transitions. Word has length 107 [2021-11-23 16:52:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:07,386 INFO L470 AbstractCegarLoop]: Abstraction has 13841 states and 16456 transitions. [2021-11-23 16:52:07,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 13841 states and 16456 transitions. [2021-11-23 16:52:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 16:52:07,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:07,390 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:52:07,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:07,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:07,590 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:52:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:07,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1588405029, now seen corresponding path program 1 times [2021-11-23 16:52:07,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:07,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656025514] [2021-11-23 16:52:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:07,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:07,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:07,593 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:07,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-11-23 16:52:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:07,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:07,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:09,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:09,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656025514] [2021-11-23 16:52:09,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656025514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:09,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [77264814] [2021-11-23 16:52:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:09,428 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:09,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:09,430 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:09,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2021-11-23 16:52:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:09,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:09,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:11,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:11,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [77264814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:11,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015539829] [2021-11-23 16:52:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:11,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:11,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:11,642 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:11,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-23 16:52:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:11,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:11,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:13,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:13,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015539829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:13,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:13,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:52:13,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857057840] [2021-11-23 16:52:13,944 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:13,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:52:13,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:52:13,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:52:13,946 INFO L87 Difference]: Start difference. First operand 13841 states and 16456 transitions. Second operand has 16 states, 16 states have (on average 13.0) internal successors, (208), 15 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:18,633 INFO L93 Difference]: Finished difference Result 30148 states and 35739 transitions. [2021-11-23 16:52:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 16:52:18,634 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.0) internal successors, (208), 15 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-23 16:52:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:18,663 INFO L225 Difference]: With dead ends: 30148 [2021-11-23 16:52:18,663 INFO L226 Difference]: Without dead ends: 23626 [2021-11-23 16:52:18,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-11-23 16:52:18,673 INFO L933 BasicCegarLoop]: 472 mSDtfsCounter, 497 mSDsluCounter, 4038 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 4510 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1322 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:18,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 4510 Invalid, 2174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 829 Invalid, 0 Unknown, 1322 Unchecked, 0.6s Time] [2021-11-23 16:52:18,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23626 states. [2021-11-23 16:52:21,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23626 to 15264. [2021-11-23 16:52:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15264 states, 15263 states have (on average 1.1881674638013497) internal successors, (18135), 15263 states have internal predecessors, (18135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15264 states to 15264 states and 18135 transitions. [2021-11-23 16:52:21,337 INFO L78 Accepts]: Start accepts. Automaton has 15264 states and 18135 transitions. Word has length 108 [2021-11-23 16:52:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:21,337 INFO L470 AbstractCegarLoop]: Abstraction has 15264 states and 18135 transitions. [2021-11-23 16:52:21,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.0) internal successors, (208), 15 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:21,337 INFO L276 IsEmpty]: Start isEmpty. Operand 15264 states and 18135 transitions. [2021-11-23 16:52:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 16:52:21,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:21,346 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:52:21,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2021-11-23 16:52:21,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-23 16:52:21,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2021-11-23 16:52:21,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:21,951 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:52:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash 102264160, now seen corresponding path program 1 times [2021-11-23 16:52:21,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:21,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335717230] [2021-11-23 16:52:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:21,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:21,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:21,953 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:21,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2021-11-23 16:52:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:22,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:23,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:23,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:23,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335717230] [2021-11-23 16:52:23,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335717230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:23,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [120638782] [2021-11-23 16:52:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:23,980 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:23,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:23,981 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:23,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2021-11-23 16:52:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:24,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:24,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:25,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:26,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [120638782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:26,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163612565] [2021-11-23 16:52:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:26,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:26,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:26,212 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:26,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-23 16:52:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:26,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:26,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:28,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:28,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163612565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:28,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:28,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:52:28,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613347071] [2021-11-23 16:52:28,392 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:28,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:52:28,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:28,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:52:28,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:52:28,394 INFO L87 Difference]: Start difference. First operand 15264 states and 18135 transitions. Second operand has 16 states, 16 states have (on average 12.5) internal successors, (200), 15 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:31,759 INFO L93 Difference]: Finished difference Result 18804 states and 22458 transitions. [2021-11-23 16:52:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 16:52:31,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.5) internal successors, (200), 15 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-23 16:52:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:31,779 INFO L225 Difference]: With dead ends: 18804 [2021-11-23 16:52:31,780 INFO L226 Difference]: Without dead ends: 15316 [2021-11-23 16:52:31,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-11-23 16:52:31,786 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 392 mSDsluCounter, 3073 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 3523 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 794 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:31,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 3523 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 699 Invalid, 0 Unknown, 794 Unchecked, 0.5s Time] [2021-11-23 16:52:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15316 states. [2021-11-23 16:52:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15316 to 15197. [2021-11-23 16:52:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15197 states, 15196 states have (on average 1.1881416162147933) internal successors, (18055), 15196 states have internal predecessors, (18055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15197 states to 15197 states and 18055 transitions. [2021-11-23 16:52:34,549 INFO L78 Accepts]: Start accepts. Automaton has 15197 states and 18055 transitions. Word has length 108 [2021-11-23 16:52:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:34,549 INFO L470 AbstractCegarLoop]: Abstraction has 15197 states and 18055 transitions. [2021-11-23 16:52:34,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.5) internal successors, (200), 15 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:34,549 INFO L276 IsEmpty]: Start isEmpty. Operand 15197 states and 18055 transitions. [2021-11-23 16:52:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 16:52:34,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:34,553 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:52:34,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (94)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:34,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:34,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:35,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:35,154 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:52:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:35,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1429261755, now seen corresponding path program 1 times [2021-11-23 16:52:35,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:35,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099872405] [2021-11-23 16:52:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:35,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:35,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:35,156 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:35,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2021-11-23 16:52:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:35,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:52:35,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:36,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:36,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:36,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099872405] [2021-11-23 16:52:36,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099872405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:36,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [54132058] [2021-11-23 16:52:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:36,849 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:36,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:36,850 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:36,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2021-11-23 16:52:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:37,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:52:37,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 16:52:38,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:38,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [54132058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:38,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:52:38,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13, 10] total 28 [2021-11-23 16:52:38,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361924200] [2021-11-23 16:52:38,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:38,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 16:52:38,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 16:52:38,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-11-23 16:52:38,304 INFO L87 Difference]: Start difference. First operand 15197 states and 18055 transitions. Second operand has 10 states, 10 states have (on average 10.2) internal successors, (102), 10 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:41,075 INFO L93 Difference]: Finished difference Result 16557 states and 19665 transitions. [2021-11-23 16:52:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:52:41,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.2) internal successors, (102), 10 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-23 16:52:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:41,095 INFO L225 Difference]: With dead ends: 16557 [2021-11-23 16:52:41,095 INFO L226 Difference]: Without dead ends: 14769 [2021-11-23 16:52:41,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-11-23 16:52:41,101 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 134 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:41,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1704 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 68 Unchecked, 0.0s Time] [2021-11-23 16:52:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14769 states. [2021-11-23 16:52:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14769 to 14435. [2021-11-23 16:52:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14435 states, 14434 states have (on average 1.1875433005403908) internal successors, (17141), 14434 states have internal predecessors, (17141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14435 states to 14435 states and 17141 transitions. [2021-11-23 16:52:43,730 INFO L78 Accepts]: Start accepts. Automaton has 14435 states and 17141 transitions. Word has length 109 [2021-11-23 16:52:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:43,730 INFO L470 AbstractCegarLoop]: Abstraction has 14435 states and 17141 transitions. [2021-11-23 16:52:43,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.2) internal successors, (102), 10 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 14435 states and 17141 transitions. [2021-11-23 16:52:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 16:52:43,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:43,734 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:52:43,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:43,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (97)] Ended with exit code 0 [2021-11-23 16:52:44,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:44,135 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:52:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:44,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1867932466, now seen corresponding path program 1 times [2021-11-23 16:52:44,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:44,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134566419] [2021-11-23 16:52:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:44,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:44,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:44,137 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:44,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-11-23 16:52:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:52:44,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:45,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:45,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:45,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134566419] [2021-11-23 16:52:45,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134566419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:45,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:45,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 16:52:45,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428637727] [2021-11-23 16:52:45,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:45,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 16:52:45,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:45,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 16:52:45,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:52:45,127 INFO L87 Difference]: Start difference. First operand 14435 states and 17141 transitions. Second operand has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:47,793 INFO L93 Difference]: Finished difference Result 18171 states and 21695 transitions. [2021-11-23 16:52:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 16:52:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-23 16:52:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:47,812 INFO L225 Difference]: With dead ends: 18171 [2021-11-23 16:52:47,812 INFO L226 Difference]: Without dead ends: 14224 [2021-11-23 16:52:47,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-23 16:52:47,819 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 82 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 2704 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:47,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 2704 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2021-11-23 16:52:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14224 states. [2021-11-23 16:52:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14224 to 14224. [2021-11-23 16:52:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14224 states, 14223 states have (on average 1.1880053434577797) internal successors, (16897), 14223 states have internal predecessors, (16897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14224 states to 14224 states and 16897 transitions. [2021-11-23 16:52:50,393 INFO L78 Accepts]: Start accepts. Automaton has 14224 states and 16897 transitions. Word has length 109 [2021-11-23 16:52:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:50,394 INFO L470 AbstractCegarLoop]: Abstraction has 14224 states and 16897 transitions. [2021-11-23 16:52:50,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 14224 states and 16897 transitions. [2021-11-23 16:52:50,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 16:52:50,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:50,397 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:52:50,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2021-11-23 16:52:50,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:50,600 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:52:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1104761902, now seen corresponding path program 1 times [2021-11-23 16:52:50,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:50,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402088923] [2021-11-23 16:52:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:50,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:50,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:50,604 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:50,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-11-23 16:52:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:50,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:52:50,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:52:52,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:52,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:52,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402088923] [2021-11-23 16:52:52,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402088923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:52,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:52,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:52:52,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855833178] [2021-11-23 16:52:52,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:52,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:52:52,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:52,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:52:52,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:52:52,045 INFO L87 Difference]: Start difference. First operand 14224 states and 16897 transitions. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:54,710 INFO L93 Difference]: Finished difference Result 16362 states and 19435 transitions. [2021-11-23 16:52:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:52:54,711 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-23 16:52:54,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:54,730 INFO L225 Difference]: With dead ends: 16362 [2021-11-23 16:52:54,730 INFO L226 Difference]: Without dead ends: 14232 [2021-11-23 16:52:54,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:52:54,736 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 51 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:54,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 970 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 188 Unchecked, 0.1s Time] [2021-11-23 16:52:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2021-11-23 16:52:57,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 14232. [2021-11-23 16:52:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14232 states, 14231 states have (on average 1.1879699248120301) internal successors, (16906), 14231 states have internal predecessors, (16906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14232 states to 14232 states and 16906 transitions. [2021-11-23 16:52:57,364 INFO L78 Accepts]: Start accepts. Automaton has 14232 states and 16906 transitions. Word has length 110 [2021-11-23 16:52:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:57,365 INFO L470 AbstractCegarLoop]: Abstraction has 14232 states and 16906 transitions. [2021-11-23 16:52:57,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 14232 states and 16906 transitions. [2021-11-23 16:52:57,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 16:52:57,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:57,368 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:52:57,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:57,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:57,569 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:52:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:57,569 INFO L85 PathProgramCache]: Analyzing trace with hash 581441231, now seen corresponding path program 1 times [2021-11-23 16:52:57,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:57,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078602823] [2021-11-23 16:52:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:57,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:57,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:57,572 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:57,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2021-11-23 16:52:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:52:57,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:59,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:00,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:00,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078602823] [2021-11-23 16:53:00,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078602823] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:00,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1260951349] [2021-11-23 16:53:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:00,326 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:00,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:00,327 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:00,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2021-11-23 16:53:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:00,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:53:00,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:03,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:03,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1260951349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:03,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821032403] [2021-11-23 16:53:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:03,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:03,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:03,471 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:03,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-23 16:53:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:03,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:53:03,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:05,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:06,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821032403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:06,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:53:06,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 16:53:06,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540051471] [2021-11-23 16:53:06,030 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:06,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 16:53:06,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:06,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 16:53:06,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 16:53:06,031 INFO L87 Difference]: Start difference. First operand 14232 states and 16906 transitions. Second operand has 32 states, 32 states have (on average 11.03125) internal successors, (353), 31 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:12,042 INFO L93 Difference]: Finished difference Result 23096 states and 27167 transitions. [2021-11-23 16:53:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 16:53:12,042 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 11.03125) internal successors, (353), 31 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-23 16:53:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:12,071 INFO L225 Difference]: With dead ends: 23096 [2021-11-23 16:53:12,071 INFO L226 Difference]: Without dead ends: 21090 [2021-11-23 16:53:12,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=326, Invalid=2980, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 16:53:12,078 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 751 mSDsluCounter, 6309 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 6847 SdHoareTripleChecker+Invalid, 4060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1356 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:12,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 6847 Invalid, 4060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2669 Invalid, 0 Unknown, 1356 Unchecked, 1.6s Time] [2021-11-23 16:53:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21090 states. [2021-11-23 16:53:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21090 to 14311. [2021-11-23 16:53:14,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14311 states, 14310 states have (on average 1.1878406708595388) internal successors, (16998), 14310 states have internal predecessors, (16998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14311 states to 14311 states and 16998 transitions. [2021-11-23 16:53:14,788 INFO L78 Accepts]: Start accepts. Automaton has 14311 states and 16998 transitions. Word has length 110 [2021-11-23 16:53:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:14,788 INFO L470 AbstractCegarLoop]: Abstraction has 14311 states and 16998 transitions. [2021-11-23 16:53:14,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 11.03125) internal successors, (353), 31 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 14311 states and 16998 transitions. [2021-11-23 16:53:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 16:53:14,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:14,792 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:53:14,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:14,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2021-11-23 16:53:15,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-11-23 16:53:15,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:15,393 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:53:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:15,394 INFO L85 PathProgramCache]: Analyzing trace with hash -788680273, now seen corresponding path program 1 times [2021-11-23 16:53:15,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:15,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511636194] [2021-11-23 16:53:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:15,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:15,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:15,396 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:15,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2021-11-23 16:53:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:15,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:53:15,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 16:53:16,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:16,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511636194] [2021-11-23 16:53:16,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511636194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:16,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:16,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:53:16,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473958742] [2021-11-23 16:53:16,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:16,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:53:16,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:53:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:53:16,767 INFO L87 Difference]: Start difference. First operand 14311 states and 16998 transitions. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:19,330 INFO L93 Difference]: Finished difference Result 16495 states and 19587 transitions. [2021-11-23 16:53:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:53:19,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-23 16:53:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:19,351 INFO L225 Difference]: With dead ends: 16495 [2021-11-23 16:53:19,351 INFO L226 Difference]: Without dead ends: 14301 [2021-11-23 16:53:19,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:53:19,357 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 51 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:19,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1135 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 324 Unchecked, 0.1s Time] [2021-11-23 16:53:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14301 states. [2021-11-23 16:53:21,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14301 to 14301. [2021-11-23 16:53:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14301 states, 14300 states have (on average 1.1877622377622377) internal successors, (16985), 14300 states have internal predecessors, (16985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14301 states to 14301 states and 16985 transitions. [2021-11-23 16:53:21,912 INFO L78 Accepts]: Start accepts. Automaton has 14301 states and 16985 transitions. Word has length 110 [2021-11-23 16:53:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:21,913 INFO L470 AbstractCegarLoop]: Abstraction has 14301 states and 16985 transitions. [2021-11-23 16:53:21,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 14301 states and 16985 transitions. [2021-11-23 16:53:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 16:53:21,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:21,917 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:53:21,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:22,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:22,119 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:53:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:22,119 INFO L85 PathProgramCache]: Analyzing trace with hash -722814088, now seen corresponding path program 1 times [2021-11-23 16:53:22,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:22,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268448332] [2021-11-23 16:53:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:22,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:22,122 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:22,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2021-11-23 16:53:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:22,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:22,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 16:53:22,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:22,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:22,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268448332] [2021-11-23 16:53:22,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268448332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:22,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:22,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:53:22,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615815133] [2021-11-23 16:53:22,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:22,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:53:22,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:22,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:53:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:53:22,973 INFO L87 Difference]: Start difference. First operand 14301 states and 16985 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:25,120 INFO L93 Difference]: Finished difference Result 16006 states and 19089 transitions. [2021-11-23 16:53:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:53:25,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-23 16:53:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:25,140 INFO L225 Difference]: With dead ends: 16006 [2021-11-23 16:53:25,141 INFO L226 Difference]: Without dead ends: 12087 [2021-11-23 16:53:25,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:53:25,147 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 64 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:25,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 832 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2021-11-23 16:53:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12087 states. [2021-11-23 16:53:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12087 to 12087. [2021-11-23 16:53:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12087 states, 12086 states have (on average 1.185669369518451) internal successors, (14330), 12086 states have internal predecessors, (14330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12087 states to 12087 states and 14330 transitions. [2021-11-23 16:53:27,321 INFO L78 Accepts]: Start accepts. Automaton has 12087 states and 14330 transitions. Word has length 110 [2021-11-23 16:53:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:27,321 INFO L470 AbstractCegarLoop]: Abstraction has 12087 states and 14330 transitions. [2021-11-23 16:53:27,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 12087 states and 14330 transitions. [2021-11-23 16:53:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 16:53:27,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:27,325 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:53:27,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:27,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:27,526 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:53:27,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:27,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1909497783, now seen corresponding path program 1 times [2021-11-23 16:53:27,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:27,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021815453] [2021-11-23 16:53:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:27,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:27,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:27,528 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:27,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-11-23 16:53:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:27,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:53:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 16:53:28,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:28,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:28,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021815453] [2021-11-23 16:53:28,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021815453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:28,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:28,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:53:28,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122053720] [2021-11-23 16:53:28,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:28,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:53:28,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:28,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:53:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:53:28,292 INFO L87 Difference]: Start difference. First operand 12087 states and 14330 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:30,583 INFO L93 Difference]: Finished difference Result 16260 states and 19371 transitions. [2021-11-23 16:53:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:53:30,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-23 16:53:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:30,597 INFO L225 Difference]: With dead ends: 16260 [2021-11-23 16:53:30,597 INFO L226 Difference]: Without dead ends: 11658 [2021-11-23 16:53:30,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:53:30,603 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 36 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:30,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 772 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 271 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2021-11-23 16:53:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11658 states. [2021-11-23 16:53:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11658 to 11640. [2021-11-23 16:53:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11640 states, 11639 states have (on average 1.186356216169774) internal successors, (13808), 11639 states have internal predecessors, (13808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11640 states to 11640 states and 13808 transitions. [2021-11-23 16:53:32,732 INFO L78 Accepts]: Start accepts. Automaton has 11640 states and 13808 transitions. Word has length 110 [2021-11-23 16:53:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:32,732 INFO L470 AbstractCegarLoop]: Abstraction has 11640 states and 13808 transitions. [2021-11-23 16:53:32,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 11640 states and 13808 transitions. [2021-11-23 16:53:32,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 16:53:32,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:32,735 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:53:32,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2021-11-23 16:53:32,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:32,950 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:53:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:32,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1714598875, now seen corresponding path program 1 times [2021-11-23 16:53:32,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:32,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755586013] [2021-11-23 16:53:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:32,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:32,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:32,953 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:32,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2021-11-23 16:53:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:33,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:53:33,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:34,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:34,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:34,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755586013] [2021-11-23 16:53:34,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755586013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:34,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [394184757] [2021-11-23 16:53:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:34,608 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:34,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:34,610 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:34,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2021-11-23 16:53:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:35,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:53:35,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:36,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:36,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [394184757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:36,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22943374] [2021-11-23 16:53:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:36,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:36,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:36,302 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:36,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-23 16:53:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:36,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:53:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:37,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:37,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22943374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:37,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:53:37,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12, 9, 13, 9] total 25 [2021-11-23 16:53:37,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809115247] [2021-11-23 16:53:37,982 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:37,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 16:53:37,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:37,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 16:53:37,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-11-23 16:53:37,984 INFO L87 Difference]: Start difference. First operand 11640 states and 13808 transitions. Second operand has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:40,927 INFO L93 Difference]: Finished difference Result 15429 states and 18243 transitions. [2021-11-23 16:53:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 16:53:40,928 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-23 16:53:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:40,945 INFO L225 Difference]: With dead ends: 15429 [2021-11-23 16:53:40,946 INFO L226 Difference]: Without dead ends: 13352 [2021-11-23 16:53:40,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-11-23 16:53:40,951 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 937 mSDsluCounter, 4496 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 4959 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:40,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 4959 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 328 Invalid, 0 Unknown, 263 Unchecked, 0.3s Time] [2021-11-23 16:53:40,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13352 states. [2021-11-23 16:53:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13352 to 11647. [2021-11-23 16:53:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11647 states, 11646 states have (on average 1.1859007384509703) internal successors, (13811), 11646 states have internal predecessors, (13811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11647 states to 11647 states and 13811 transitions. [2021-11-23 16:53:43,110 INFO L78 Accepts]: Start accepts. Automaton has 11647 states and 13811 transitions. Word has length 111 [2021-11-23 16:53:43,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:43,110 INFO L470 AbstractCegarLoop]: Abstraction has 11647 states and 13811 transitions. [2021-11-23 16:53:43,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:43,110 INFO L276 IsEmpty]: Start isEmpty. Operand 11647 states and 13811 transitions. [2021-11-23 16:53:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 16:53:43,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:43,113 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:53:43,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (107)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:43,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2021-11-23 16:53:43,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:43,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:43,714 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:53:43,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:43,715 INFO L85 PathProgramCache]: Analyzing trace with hash 63109031, now seen corresponding path program 1 times [2021-11-23 16:53:43,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:43,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221969464] [2021-11-23 16:53:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:43,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:43,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:43,716 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:43,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2021-11-23 16:53:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:44,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:53:44,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:44,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:44,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:44,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221969464] [2021-11-23 16:53:44,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221969464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:44,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [985162989] [2021-11-23 16:53:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:44,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:44,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:44,654 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:44,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2021-11-23 16:53:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:45,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:45,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:46,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:47,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [985162989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:47,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946251308] [2021-11-23 16:53:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:47,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:47,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:47,176 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:47,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-23 16:53:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:47,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:47,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:48,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:49,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946251308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:49,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:53:49,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 26 [2021-11-23 16:53:49,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571931041] [2021-11-23 16:53:49,346 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:49,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 16:53:49,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 16:53:49,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-11-23 16:53:49,347 INFO L87 Difference]: Start difference. First operand 11647 states and 13811 transitions. Second operand has 26 states, 26 states have (on average 13.692307692307692) internal successors, (356), 26 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:56,671 INFO L93 Difference]: Finished difference Result 26830 states and 31719 transitions. [2021-11-23 16:53:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 16:53:56,672 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 13.692307692307692) internal successors, (356), 26 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-23 16:53:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:56,705 INFO L225 Difference]: With dead ends: 26830 [2021-11-23 16:53:56,705 INFO L226 Difference]: Without dead ends: 22691 [2021-11-23 16:53:56,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 642 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=455, Invalid=4101, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 16:53:56,713 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 726 mSDsluCounter, 7446 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 8005 SdHoareTripleChecker+Invalid, 4191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2235 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:56,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 8005 Invalid, 4191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1929 Invalid, 0 Unknown, 2235 Unchecked, 1.3s Time] [2021-11-23 16:53:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22691 states. [2021-11-23 16:53:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22691 to 15657. [2021-11-23 16:53:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15657 states, 15656 states have (on average 1.1890010219724068) internal successors, (18615), 15656 states have internal predecessors, (18615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15657 states to 15657 states and 18615 transitions. [2021-11-23 16:53:59,687 INFO L78 Accepts]: Start accepts. Automaton has 15657 states and 18615 transitions. Word has length 111 [2021-11-23 16:53:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:59,687 INFO L470 AbstractCegarLoop]: Abstraction has 15657 states and 18615 transitions. [2021-11-23 16:53:59,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 13.692307692307692) internal successors, (356), 26 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 15657 states and 18615 transitions. [2021-11-23 16:53:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 16:53:59,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:59,691 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:53:59,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:59,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:00,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (110)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:00,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:00,292 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:54:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:00,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2095588858, now seen corresponding path program 1 times [2021-11-23 16:54:00,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:00,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620171750] [2021-11-23 16:54:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:00,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:00,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:00,294 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:00,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2021-11-23 16:54:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:00,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:54:00,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 16:54:01,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:01,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:01,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620171750] [2021-11-23 16:54:01,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620171750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:01,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:01,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:54:01,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713664408] [2021-11-23 16:54:01,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:01,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:54:01,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:01,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:54:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:54:01,767 INFO L87 Difference]: Start difference. First operand 15657 states and 18615 transitions. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:05,365 INFO L93 Difference]: Finished difference Result 21346 states and 25509 transitions. [2021-11-23 16:54:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:54:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-23 16:54:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:05,388 INFO L225 Difference]: With dead ends: 21346 [2021-11-23 16:54:05,388 INFO L226 Difference]: Without dead ends: 17537 [2021-11-23 16:54:05,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:54:05,397 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 209 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:05,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1422 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 297 Invalid, 0 Unknown, 373 Unchecked, 0.3s Time] [2021-11-23 16:54:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17537 states. [2021-11-23 16:54:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17537 to 15523. [2021-11-23 16:54:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15523 states, 15522 states have (on average 1.188828759180518) internal successors, (18453), 15522 states have internal predecessors, (18453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15523 states to 15523 states and 18453 transitions. [2021-11-23 16:54:08,473 INFO L78 Accepts]: Start accepts. Automaton has 15523 states and 18453 transitions. Word has length 111 [2021-11-23 16:54:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:08,474 INFO L470 AbstractCegarLoop]: Abstraction has 15523 states and 18453 transitions. [2021-11-23 16:54:08,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 15523 states and 18453 transitions. [2021-11-23 16:54:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 16:54:08,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:08,477 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:54:08,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:08,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:08,678 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:54:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash -202146683, now seen corresponding path program 1 times [2021-11-23 16:54:08,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:08,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655769229] [2021-11-23 16:54:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:08,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:08,680 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:08,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2021-11-23 16:54:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:08,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:54:08,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:09,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:09,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655769229] [2021-11-23 16:54:09,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655769229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:09,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:09,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 16:54:09,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142099834] [2021-11-23 16:54:09,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:09,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 16:54:09,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 16:54:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:54:09,725 INFO L87 Difference]: Start difference. First operand 15523 states and 18453 transitions. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:12,937 INFO L93 Difference]: Finished difference Result 17784 states and 21192 transitions. [2021-11-23 16:54:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 16:54:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-23 16:54:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:12,957 INFO L225 Difference]: With dead ends: 17784 [2021-11-23 16:54:12,957 INFO L226 Difference]: Without dead ends: 15604 [2021-11-23 16:54:12,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-23 16:54:12,961 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 152 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:12,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1873 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2021-11-23 16:54:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15604 states. [2021-11-23 16:54:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15604 to 15594. [2021-11-23 16:54:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15594 states, 15593 states have (on average 1.188417879817867) internal successors, (18531), 15593 states have internal predecessors, (18531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15594 states to 15594 states and 18531 transitions. [2021-11-23 16:54:16,019 INFO L78 Accepts]: Start accepts. Automaton has 15594 states and 18531 transitions. Word has length 111 [2021-11-23 16:54:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:16,019 INFO L470 AbstractCegarLoop]: Abstraction has 15594 states and 18531 transitions. [2021-11-23 16:54:16,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 15594 states and 18531 transitions. [2021-11-23 16:54:16,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 16:54:16,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:16,023 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:54:16,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:16,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:16,238 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:54:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:16,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1159075066, now seen corresponding path program 1 times [2021-11-23 16:54:16,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:16,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260949819] [2021-11-23 16:54:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:16,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:16,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:16,240 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:16,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-11-23 16:54:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:54:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:54:17,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:17,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:17,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260949819] [2021-11-23 16:54:17,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260949819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:17,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:17,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:54:17,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119851612] [2021-11-23 16:54:17,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:17,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:54:17,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:54:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:54:17,094 INFO L87 Difference]: Start difference. First operand 15594 states and 18531 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:20,362 INFO L93 Difference]: Finished difference Result 19982 states and 23817 transitions. [2021-11-23 16:54:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:54:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-23 16:54:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:20,381 INFO L225 Difference]: With dead ends: 19982 [2021-11-23 16:54:20,382 INFO L226 Difference]: Without dead ends: 15592 [2021-11-23 16:54:20,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:54:20,387 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 45 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:20,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 765 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2021-11-23 16:54:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15592 states. [2021-11-23 16:54:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15592 to 15592. [2021-11-23 16:54:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15592 states, 15591 states have (on average 1.1881854916297865) internal successors, (18525), 15591 states have internal predecessors, (18525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15592 states to 15592 states and 18525 transitions. [2021-11-23 16:54:23,507 INFO L78 Accepts]: Start accepts. Automaton has 15592 states and 18525 transitions. Word has length 111 [2021-11-23 16:54:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:23,507 INFO L470 AbstractCegarLoop]: Abstraction has 15592 states and 18525 transitions. [2021-11-23 16:54:23,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 15592 states and 18525 transitions. [2021-11-23 16:54:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 16:54:23,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:23,511 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:54:23,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:23,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:23,712 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:54:23,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:23,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1740631041, now seen corresponding path program 1 times [2021-11-23 16:54:23,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:23,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303963746] [2021-11-23 16:54:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:23,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:23,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:23,714 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:23,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2021-11-23 16:54:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:54:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:24,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:24,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:24,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303963746] [2021-11-23 16:54:24,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303963746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:24,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:24,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:54:24,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755627031] [2021-11-23 16:54:24,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:24,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:54:24,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:24,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:54:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:54:24,312 INFO L87 Difference]: Start difference. First operand 15592 states and 18525 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:27,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:27,525 INFO L93 Difference]: Finished difference Result 17556 states and 20925 transitions. [2021-11-23 16:54:27,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:54:27,526 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 16:54:27,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:27,544 INFO L225 Difference]: With dead ends: 17556 [2021-11-23 16:54:27,544 INFO L226 Difference]: Without dead ends: 15376 [2021-11-23 16:54:27,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:54:27,550 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 57 mSDsluCounter, 2370 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2751 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:27,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 2751 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2021-11-23 16:54:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15376 states. [2021-11-23 16:54:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15376 to 15305. [2021-11-23 16:54:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15305 states, 15304 states have (on average 1.1891008886565604) internal successors, (18198), 15304 states have internal predecessors, (18198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15305 states to 15305 states and 18198 transitions. [2021-11-23 16:54:30,625 INFO L78 Accepts]: Start accepts. Automaton has 15305 states and 18198 transitions. Word has length 112 [2021-11-23 16:54:30,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:30,625 INFO L470 AbstractCegarLoop]: Abstraction has 15305 states and 18198 transitions. [2021-11-23 16:54:30,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:30,625 INFO L276 IsEmpty]: Start isEmpty. Operand 15305 states and 18198 transitions. [2021-11-23 16:54:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 16:54:30,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:30,628 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:54:30,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (115)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:30,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:30,829 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:54:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1255662147, now seen corresponding path program 1 times [2021-11-23 16:54:30,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:30,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248333608] [2021-11-23 16:54:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:30,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:30,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:30,832 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:30,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2021-11-23 16:54:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:54:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:33,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:33,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248333608] [2021-11-23 16:54:33,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248333608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [56111395] [2021-11-23 16:54:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:33,675 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:33,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:54:33,675 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:54:33,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (117)] Waiting until timeout for monitored process [2021-11-23 16:54:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:34,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:54:34,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:36,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:36,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [56111395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:36,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350513429] [2021-11-23 16:54:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:36,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:54:36,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:54:36,735 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:54:36,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-11-23 16:54:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:36,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:54:36,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:38,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:39,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350513429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:39,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:54:39,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 8, 8] total 29 [2021-11-23 16:54:39,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996377908] [2021-11-23 16:54:39,555 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:54:39,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 16:54:39,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:39,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 16:54:39,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-11-23 16:54:39,557 INFO L87 Difference]: Start difference. First operand 15305 states and 18198 transitions. Second operand has 30 states, 30 states have (on average 11.666666666666666) internal successors, (350), 29 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:46,384 INFO L93 Difference]: Finished difference Result 41689 states and 49853 transitions. [2021-11-23 16:54:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 16:54:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 11.666666666666666) internal successors, (350), 29 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-23 16:54:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:46,427 INFO L225 Difference]: With dead ends: 41689 [2021-11-23 16:54:46,427 INFO L226 Difference]: Without dead ends: 28708 [2021-11-23 16:54:46,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 16:54:46,438 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 494 mSDsluCounter, 4695 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 5103 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 915 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:46,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 5103 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 562 Invalid, 0 Unknown, 915 Unchecked, 0.5s Time] [2021-11-23 16:54:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28708 states. [2021-11-23 16:54:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28708 to 25712. [2021-11-23 16:54:51,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25712 states, 25711 states have (on average 1.1962195169382754) internal successors, (30756), 25711 states have internal predecessors, (30756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25712 states to 25712 states and 30756 transitions. [2021-11-23 16:54:51,978 INFO L78 Accepts]: Start accepts. Automaton has 25712 states and 30756 transitions. Word has length 113 [2021-11-23 16:54:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:51,978 INFO L470 AbstractCegarLoop]: Abstraction has 25712 states and 30756 transitions. [2021-11-23 16:54:51,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 11.666666666666666) internal successors, (350), 29 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 25712 states and 30756 transitions. [2021-11-23 16:54:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 16:54:51,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:51,983 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:54:51,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:52,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:52,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (117)] Ended with exit code 0 [2021-11-23 16:54:52,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:52,588 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:54:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash 232087552, now seen corresponding path program 1 times [2021-11-23 16:54:52,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:52,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179619496] [2021-11-23 16:54:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:52,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:52,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:52,590 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:52,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2021-11-23 16:54:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:52,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:54:52,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:53,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:53,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:53,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179619496] [2021-11-23 16:54:53,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179619496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:53,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:53,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:54:53,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357336960] [2021-11-23 16:54:53,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:53,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:54:53,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:53,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:54:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:54:53,816 INFO L87 Difference]: Start difference. First operand 25712 states and 30756 transitions. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:00,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:00,119 INFO L93 Difference]: Finished difference Result 32153 states and 38644 transitions. [2021-11-23 16:55:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:55:00,120 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-23 16:55:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:00,162 INFO L225 Difference]: With dead ends: 32153 [2021-11-23 16:55:00,162 INFO L226 Difference]: Without dead ends: 29659 [2021-11-23 16:55:00,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:55:00,171 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 224 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 573 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:00,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1681 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 573 Unchecked, 0.2s Time] [2021-11-23 16:55:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29659 states. [2021-11-23 16:55:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29659 to 26824. [2021-11-23 16:55:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26824 states, 26823 states have (on average 1.1967714275062447) internal successors, (32101), 26823 states have internal predecessors, (32101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26824 states to 26824 states and 32101 transitions. [2021-11-23 16:55:06,088 INFO L78 Accepts]: Start accepts. Automaton has 26824 states and 32101 transitions. Word has length 113 [2021-11-23 16:55:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:06,089 INFO L470 AbstractCegarLoop]: Abstraction has 26824 states and 32101 transitions. [2021-11-23 16:55:06,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 26824 states and 32101 transitions. [2021-11-23 16:55:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 16:55:06,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:06,093 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:55:06,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (119)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:06,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:06,294 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:55:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:06,295 INFO L85 PathProgramCache]: Analyzing trace with hash -204213058, now seen corresponding path program 1 times [2021-11-23 16:55:06,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:06,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808506454] [2021-11-23 16:55:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:06,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:06,297 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:06,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2021-11-23 16:55:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:06,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:55:06,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:55:07,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:07,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:07,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808506454] [2021-11-23 16:55:07,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808506454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:07,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:07,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:55:07,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710974354] [2021-11-23 16:55:07,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:07,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:55:07,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:55:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:55:07,221 INFO L87 Difference]: Start difference. First operand 26824 states and 32101 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:13,211 INFO L93 Difference]: Finished difference Result 32200 states and 38683 transitions. [2021-11-23 16:55:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:55:13,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-23 16:55:13,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:13,254 INFO L225 Difference]: With dead ends: 32200 [2021-11-23 16:55:13,254 INFO L226 Difference]: Without dead ends: 28468 [2021-11-23 16:55:13,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:55:13,264 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 131 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:13,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 877 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 296 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2021-11-23 16:55:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28468 states. [2021-11-23 16:55:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28468 to 25637. [2021-11-23 16:55:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 1.195740365111562) internal successors, (30654), 25636 states have internal predecessors, (30654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 30654 transitions. [2021-11-23 16:55:18,598 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 30654 transitions. Word has length 113 [2021-11-23 16:55:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:18,599 INFO L470 AbstractCegarLoop]: Abstraction has 25637 states and 30654 transitions. [2021-11-23 16:55:18,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 30654 transitions. [2021-11-23 16:55:18,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 16:55:18,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:18,604 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:55:18,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:18,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:18,805 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:55:18,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:18,805 INFO L85 PathProgramCache]: Analyzing trace with hash 642868158, now seen corresponding path program 1 times [2021-11-23 16:55:18,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:18,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80235033] [2021-11-23 16:55:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:18,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:18,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:18,807 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:18,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2021-11-23 16:55:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:19,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:55:19,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 16:55:20,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:20,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:20,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80235033] [2021-11-23 16:55:20,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80235033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:20,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:20,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:55:20,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134277615] [2021-11-23 16:55:20,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:20,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:55:20,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:20,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:55:20,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:55:20,341 INFO L87 Difference]: Start difference. First operand 25637 states and 30654 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:26,861 INFO L93 Difference]: Finished difference Result 32606 states and 39178 transitions. [2021-11-23 16:55:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:55:26,862 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-23 16:55:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:26,906 INFO L225 Difference]: With dead ends: 32606 [2021-11-23 16:55:26,906 INFO L226 Difference]: Without dead ends: 29580 [2021-11-23 16:55:26,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:55:26,915 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 265 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:26,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1083 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 208 Unchecked, 0.1s Time] [2021-11-23 16:55:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29580 states. [2021-11-23 16:55:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29580 to 25468. [2021-11-23 16:55:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25468 states, 25467 states have (on average 1.1950367141791338) internal successors, (30434), 25467 states have internal predecessors, (30434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25468 states to 25468 states and 30434 transitions. [2021-11-23 16:55:32,305 INFO L78 Accepts]: Start accepts. Automaton has 25468 states and 30434 transitions. Word has length 113 [2021-11-23 16:55:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:32,306 INFO L470 AbstractCegarLoop]: Abstraction has 25468 states and 30434 transitions. [2021-11-23 16:55:32,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 25468 states and 30434 transitions. [2021-11-23 16:55:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 16:55:32,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:32,310 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:55:32,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (121)] Ended with exit code 0 [2021-11-23 16:55:32,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:32,515 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:55:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash 938463934, now seen corresponding path program 1 times [2021-11-23 16:55:32,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:32,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708847593] [2021-11-23 16:55:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:32,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:32,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:32,518 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:32,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2021-11-23 16:55:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:55:32,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 16:55:33,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:33,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:33,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708847593] [2021-11-23 16:55:33,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708847593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:33,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:33,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:55:33,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3807059] [2021-11-23 16:55:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:33,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:55:33,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:33,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:55:33,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:55:33,677 INFO L87 Difference]: Start difference. First operand 25468 states and 30434 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:38,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:38,906 INFO L93 Difference]: Finished difference Result 28670 states and 34354 transitions. [2021-11-23 16:55:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:55:38,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-23 16:55:38,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:38,944 INFO L225 Difference]: With dead ends: 28670 [2021-11-23 16:55:38,944 INFO L226 Difference]: Without dead ends: 25474 [2021-11-23 16:55:38,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:55:38,954 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 48 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:38,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 724 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-11-23 16:55:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25474 states. [2021-11-23 16:55:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25474 to 25461. [2021-11-23 16:55:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25461 states, 25460 states have (on average 1.1950117831893166) internal successors, (30425), 25460 states have internal predecessors, (30425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25461 states to 25461 states and 30425 transitions. [2021-11-23 16:55:44,392 INFO L78 Accepts]: Start accepts. Automaton has 25461 states and 30425 transitions. Word has length 113 [2021-11-23 16:55:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:44,392 INFO L470 AbstractCegarLoop]: Abstraction has 25461 states and 30425 transitions. [2021-11-23 16:55:44,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 25461 states and 30425 transitions. [2021-11-23 16:55:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 16:55:44,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:44,397 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:55:44,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:44,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:44,598 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:55:44,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash -681881045, now seen corresponding path program 1 times [2021-11-23 16:55:44,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:44,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330749209] [2021-11-23 16:55:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:44,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:44,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:44,600 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:44,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2021-11-23 16:55:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:44,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:55:44,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:45,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:45,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:45,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330749209] [2021-11-23 16:55:45,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330749209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:45,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:45,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:55:45,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471485690] [2021-11-23 16:55:45,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:45,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:55:45,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:45,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:55:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:55:45,218 INFO L87 Difference]: Start difference. First operand 25461 states and 30425 transitions. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:50,686 INFO L93 Difference]: Finished difference Result 29126 states and 34813 transitions. [2021-11-23 16:55:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:55:50,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-23 16:55:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:50,723 INFO L225 Difference]: With dead ends: 29126 [2021-11-23 16:55:50,723 INFO L226 Difference]: Without dead ends: 26034 [2021-11-23 16:55:50,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:55:50,729 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 149 mSDsluCounter, 2646 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 3083 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:50,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 3083 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 214 Unchecked, 0.1s Time] [2021-11-23 16:55:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26034 states. [2021-11-23 16:55:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26034 to 25411. [2021-11-23 16:55:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25411 states, 25410 states have (on average 1.194254230617867) internal successors, (30346), 25410 states have internal predecessors, (30346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25411 states to 25411 states and 30346 transitions. [2021-11-23 16:55:56,160 INFO L78 Accepts]: Start accepts. Automaton has 25411 states and 30346 transitions. Word has length 114 [2021-11-23 16:55:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:56,161 INFO L470 AbstractCegarLoop]: Abstraction has 25411 states and 30346 transitions. [2021-11-23 16:55:56,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:56,161 INFO L276 IsEmpty]: Start isEmpty. Operand 25411 states and 30346 transitions. [2021-11-23 16:55:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 16:55:56,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:56,166 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:55:56,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:56,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:56,366 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:55:56,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1294972561, now seen corresponding path program 1 times [2021-11-23 16:55:56,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:56,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837137894] [2021-11-23 16:55:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:56,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:56,368 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:56,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2021-11-23 16:55:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:55:56,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 16:55:57,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:57,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:57,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837137894] [2021-11-23 16:55:57,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837137894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:57,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:57,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:55:57,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143421655] [2021-11-23 16:55:57,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:57,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:55:57,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:55:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:55:57,137 INFO L87 Difference]: Start difference. First operand 25411 states and 30346 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:02,676 INFO L93 Difference]: Finished difference Result 28143 states and 33679 transitions. [2021-11-23 16:56:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:56:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-23 16:56:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:02,710 INFO L225 Difference]: With dead ends: 28143 [2021-11-23 16:56:02,711 INFO L226 Difference]: Without dead ends: 25068 [2021-11-23 16:56:02,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:56:02,716 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 47 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:02,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 969 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2021-11-23 16:56:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25068 states. [2021-11-23 16:56:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25068 to 25049. [2021-11-23 16:56:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25049 states, 25048 states have (on average 1.1933886937080804) internal successors, (29892), 25048 states have internal predecessors, (29892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25049 states to 25049 states and 29892 transitions. [2021-11-23 16:56:07,986 INFO L78 Accepts]: Start accepts. Automaton has 25049 states and 29892 transitions. Word has length 114 [2021-11-23 16:56:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:07,986 INFO L470 AbstractCegarLoop]: Abstraction has 25049 states and 29892 transitions. [2021-11-23 16:56:07,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 25049 states and 29892 transitions. [2021-11-23 16:56:07,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 16:56:07,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:07,991 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:56:08,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (124)] Ended with exit code 0 [2021-11-23 16:56:08,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:08,193 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:56:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash 634629664, now seen corresponding path program 1 times [2021-11-23 16:56:08,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:08,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28601345] [2021-11-23 16:56:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:08,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:08,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:08,195 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:08,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2021-11-23 16:56:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:56:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:10,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:10,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:10,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28601345] [2021-11-23 16:56:10,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28601345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:10,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:10,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 16:56:10,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779368865] [2021-11-23 16:56:10,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:10,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 16:56:10,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:10,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 16:56:10,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:56:10,189 INFO L87 Difference]: Start difference. First operand 25049 states and 29892 transitions. Second operand has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:15,530 INFO L93 Difference]: Finished difference Result 30997 states and 37125 transitions. [2021-11-23 16:56:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 16:56:15,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-23 16:56:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:15,569 INFO L225 Difference]: With dead ends: 30997 [2021-11-23 16:56:15,569 INFO L226 Difference]: Without dead ends: 25049 [2021-11-23 16:56:15,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:56:15,580 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 57 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 921 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:15,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 2433 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 921 Unchecked, 0.2s Time] [2021-11-23 16:56:15,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25049 states. [2021-11-23 16:56:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25049 to 25049. [2021-11-23 16:56:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25049 states, 25048 states have (on average 1.1933487703609071) internal successors, (29891), 25048 states have internal predecessors, (29891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25049 states to 25049 states and 29891 transitions. [2021-11-23 16:56:20,968 INFO L78 Accepts]: Start accepts. Automaton has 25049 states and 29891 transitions. Word has length 116 [2021-11-23 16:56:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:20,968 INFO L470 AbstractCegarLoop]: Abstraction has 25049 states and 29891 transitions. [2021-11-23 16:56:20,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.923076923076923) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 25049 states and 29891 transitions. [2021-11-23 16:56:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 16:56:20,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:20,973 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:56:20,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:21,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:21,174 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:56:21,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1157950335, now seen corresponding path program 1 times [2021-11-23 16:56:21,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:21,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381795212] [2021-11-23 16:56:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:21,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:21,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:21,176 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:21,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2021-11-23 16:56:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:21,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:56:21,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:56:22,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:22,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:22,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381795212] [2021-11-23 16:56:22,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381795212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:22,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:22,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:56:22,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636239306] [2021-11-23 16:56:22,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:22,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:56:22,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:56:22,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:56:22,777 INFO L87 Difference]: Start difference. First operand 25049 states and 29891 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:29,503 INFO L93 Difference]: Finished difference Result 37181 states and 44555 transitions. [2021-11-23 16:56:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:56:29,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-23 16:56:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:29,545 INFO L225 Difference]: With dead ends: 37181 [2021-11-23 16:56:29,545 INFO L226 Difference]: Without dead ends: 30951 [2021-11-23 16:56:29,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:56:29,553 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 239 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:29,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 1068 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 198 Unchecked, 0.1s Time] [2021-11-23 16:56:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30951 states. [2021-11-23 16:56:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30951 to 25049. [2021-11-23 16:56:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25049 states, 25048 states have (on average 1.1933088470137336) internal successors, (29890), 25048 states have internal predecessors, (29890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25049 states to 25049 states and 29890 transitions. [2021-11-23 16:56:34,834 INFO L78 Accepts]: Start accepts. Automaton has 25049 states and 29890 transitions. Word has length 116 [2021-11-23 16:56:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:34,834 INFO L470 AbstractCegarLoop]: Abstraction has 25049 states and 29890 transitions. [2021-11-23 16:56:34,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 25049 states and 29890 transitions. [2021-11-23 16:56:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 16:56:34,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:34,839 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:56:34,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:35,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:35,040 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:56:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:35,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1542920666, now seen corresponding path program 1 times [2021-11-23 16:56:35,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:35,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054986259] [2021-11-23 16:56:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:35,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:35,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:35,043 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:35,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2021-11-23 16:56:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:35,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:56:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 16:56:36,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:36,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:36,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054986259] [2021-11-23 16:56:36,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054986259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:36,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:36,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:56:36,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087901790] [2021-11-23 16:56:36,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:36,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:56:36,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:36,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:56:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:56:36,585 INFO L87 Difference]: Start difference. First operand 25049 states and 29890 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:41,701 INFO L93 Difference]: Finished difference Result 31249 states and 37413 transitions. [2021-11-23 16:56:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:56:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-23 16:56:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:41,737 INFO L225 Difference]: With dead ends: 31249 [2021-11-23 16:56:41,738 INFO L226 Difference]: Without dead ends: 24593 [2021-11-23 16:56:41,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:56:41,748 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 48 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:41,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1605 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 537 Unchecked, 0.2s Time] [2021-11-23 16:56:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24593 states. [2021-11-23 16:56:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24593 to 24545. [2021-11-23 16:56:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24545 states, 24544 states have (on average 1.1932040417209908) internal successors, (29286), 24544 states have internal predecessors, (29286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24545 states to 24545 states and 29286 transitions. [2021-11-23 16:56:47,130 INFO L78 Accepts]: Start accepts. Automaton has 24545 states and 29286 transitions. Word has length 116 [2021-11-23 16:56:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:47,130 INFO L470 AbstractCegarLoop]: Abstraction has 24545 states and 29286 transitions. [2021-11-23 16:56:47,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24545 states and 29286 transitions. [2021-11-23 16:56:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:56:47,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:47,135 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:47,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:47,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:47,336 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:56:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:47,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1785445881, now seen corresponding path program 1 times [2021-11-23 16:56:47,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:47,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921117473] [2021-11-23 16:56:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:47,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:47,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:47,338 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:47,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2021-11-23 16:56:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:47,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:56:47,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 16:56:47,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:47,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:47,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921117473] [2021-11-23 16:56:47,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921117473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:47,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:47,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:56:47,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701956821] [2021-11-23 16:56:47,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:47,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:47,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:47,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:47,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:47,827 INFO L87 Difference]: Start difference. First operand 24545 states and 29286 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:50,855 INFO L93 Difference]: Finished difference Result 35610 states and 42708 transitions. [2021-11-23 16:56:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:50,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 16:56:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:50,873 INFO L225 Difference]: With dead ends: 35610 [2021-11-23 16:56:50,874 INFO L226 Difference]: Without dead ends: 12989 [2021-11-23 16:56:50,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:50,888 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 142 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:50,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 566 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:56:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12989 states. [2021-11-23 16:56:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12989 to 12919. [2021-11-23 16:56:53,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12919 states, 12918 states have (on average 1.181374825824431) internal successors, (15261), 12918 states have internal predecessors, (15261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12919 states to 12919 states and 15261 transitions. [2021-11-23 16:56:53,535 INFO L78 Accepts]: Start accepts. Automaton has 12919 states and 15261 transitions. Word has length 117 [2021-11-23 16:56:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:53,535 INFO L470 AbstractCegarLoop]: Abstraction has 12919 states and 15261 transitions. [2021-11-23 16:56:53,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 12919 states and 15261 transitions. [2021-11-23 16:56:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:56:53,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:53,539 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:56:53,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:53,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:53,739 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:56:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash -380722368, now seen corresponding path program 1 times [2021-11-23 16:56:53,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:53,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755941980] [2021-11-23 16:56:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:53,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:53,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:53,747 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:53,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2021-11-23 16:56:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 16:56:54,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 16:56:56,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:56,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755941980] [2021-11-23 16:56:56,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755941980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:56,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:56,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-23 16:56:56,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818320094] [2021-11-23 16:56:56,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:56,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 16:56:56,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:56,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 16:56:56,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:56:56,217 INFO L87 Difference]: Start difference. First operand 12919 states and 15261 transitions. Second operand has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:59,232 INFO L93 Difference]: Finished difference Result 14656 states and 17330 transitions. [2021-11-23 16:56:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 16:56:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 16:56:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:59,250 INFO L225 Difference]: With dead ends: 14656 [2021-11-23 16:56:59,251 INFO L226 Difference]: Without dead ends: 13207 [2021-11-23 16:56:59,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:56:59,256 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 517 mSDsluCounter, 2310 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:59,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 2667 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 614 Unchecked, 0.1s Time] [2021-11-23 16:56:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13207 states. [2021-11-23 16:57:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13207 to 12927. [2021-11-23 16:57:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12927 states, 12926 states have (on average 1.1813399350146991) internal successors, (15270), 12926 states have internal predecessors, (15270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12927 states to 12927 states and 15270 transitions. [2021-11-23 16:57:01,923 INFO L78 Accepts]: Start accepts. Automaton has 12927 states and 15270 transitions. Word has length 117 [2021-11-23 16:57:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:01,923 INFO L470 AbstractCegarLoop]: Abstraction has 12927 states and 15270 transitions. [2021-11-23 16:57:01,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 12927 states and 15270 transitions. [2021-11-23 16:57:01,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:57:01,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:01,927 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:57:01,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (129)] Ended with exit code 0 [2021-11-23 16:57:02,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:57:02,132 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:57:02,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:02,132 INFO L85 PathProgramCache]: Analyzing trace with hash -585254709, now seen corresponding path program 1 times [2021-11-23 16:57:02,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:02,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622515512] [2021-11-23 16:57:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:02,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:02,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:02,136 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:02,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2021-11-23 16:57:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:02,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:57:02,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:03,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:57:03,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:03,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622515512] [2021-11-23 16:57:03,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622515512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:57:03,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:57:03,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:57:03,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184610520] [2021-11-23 16:57:03,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:57:03,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:57:03,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:03,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:57:03,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:57:03,446 INFO L87 Difference]: Start difference. First operand 12927 states and 15270 transitions. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:06,515 INFO L93 Difference]: Finished difference Result 15894 states and 18870 transitions. [2021-11-23 16:57:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:57:06,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 16:57:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:06,532 INFO L225 Difference]: With dead ends: 15894 [2021-11-23 16:57:06,532 INFO L226 Difference]: Without dead ends: 12909 [2021-11-23 16:57:06,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:57:06,536 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 56 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 695 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:06,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1920 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 695 Unchecked, 0.2s Time] [2021-11-23 16:57:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-11-23 16:57:09,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 12909. [2021-11-23 16:57:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12909 states, 12908 states have (on average 1.1812054539820267) internal successors, (15247), 12908 states have internal predecessors, (15247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12909 states to 12909 states and 15247 transitions. [2021-11-23 16:57:09,307 INFO L78 Accepts]: Start accepts. Automaton has 12909 states and 15247 transitions. Word has length 117 [2021-11-23 16:57:09,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:09,307 INFO L470 AbstractCegarLoop]: Abstraction has 12909 states and 15247 transitions. [2021-11-23 16:57:09,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 12909 states and 15247 transitions. [2021-11-23 16:57:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:57:09,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:09,310 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:57:09,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (130)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:09,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:57:09,511 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:57:09,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:09,511 INFO L85 PathProgramCache]: Analyzing trace with hash -61934038, now seen corresponding path program 1 times [2021-11-23 16:57:09,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:09,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352135874] [2021-11-23 16:57:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:09,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:09,513 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:09,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2021-11-23 16:57:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:57:09,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:57:10,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:57:10,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:10,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352135874] [2021-11-23 16:57:10,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352135874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:57:10,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:57:10,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:57:10,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585285892] [2021-11-23 16:57:10,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:57:10,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:57:10,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:57:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:57:10,349 INFO L87 Difference]: Start difference. First operand 12909 states and 15247 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:13,961 INFO L93 Difference]: Finished difference Result 18861 states and 22444 transitions. [2021-11-23 16:57:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:57:13,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 16:57:13,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:13,982 INFO L225 Difference]: With dead ends: 18861 [2021-11-23 16:57:13,982 INFO L226 Difference]: Without dead ends: 15667 [2021-11-23 16:57:13,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:57:13,988 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 178 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:13,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 815 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2021-11-23 16:57:14,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15667 states. [2021-11-23 16:57:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15667 to 12744. [2021-11-23 16:57:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12744 states, 12743 states have (on average 1.1804127756415286) internal successors, (15042), 12743 states have internal predecessors, (15042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12744 states to 12744 states and 15042 transitions. [2021-11-23 16:57:16,915 INFO L78 Accepts]: Start accepts. Automaton has 12744 states and 15042 transitions. Word has length 117 [2021-11-23 16:57:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:16,916 INFO L470 AbstractCegarLoop]: Abstraction has 12744 states and 15042 transitions. [2021-11-23 16:57:16,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 12744 states and 15042 transitions. [2021-11-23 16:57:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 16:57:16,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:16,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:57:16,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:17,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:57:17,119 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:57:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1246721215, now seen corresponding path program 1 times [2021-11-23 16:57:17,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:17,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882149785] [2021-11-23 16:57:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:17,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:17,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:17,121 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:17,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2021-11-23 16:57:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:17,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:57:17,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 16:57:18,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 16:57:18,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:18,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882149785] [2021-11-23 16:57:18,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882149785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:18,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1940546994] [2021-11-23 16:57:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:18,307 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:18,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:18,309 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:18,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (133)] Waiting until timeout for monitored process [2021-11-23 16:57:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:18,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:57:18,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:57:18,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:57:18,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1940546994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:57:18,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:57:18,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 8 [2021-11-23 16:57:18,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989247700] [2021-11-23 16:57:18,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:57:18,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:57:18,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:57:18,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:57:18,856 INFO L87 Difference]: Start difference. First operand 12744 states and 15042 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:22,815 INFO L93 Difference]: Finished difference Result 29371 states and 34364 transitions. [2021-11-23 16:57:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:57:22,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-23 16:57:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:22,840 INFO L225 Difference]: With dead ends: 29371 [2021-11-23 16:57:22,840 INFO L226 Difference]: Without dead ends: 18281 [2021-11-23 16:57:22,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:57:22,854 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 183 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:22,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 553 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:57:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18281 states. [2021-11-23 16:57:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18281 to 17400. [2021-11-23 16:57:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17400 states, 17399 states have (on average 1.150755790562676) internal successors, (20022), 17399 states have internal predecessors, (20022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17400 states to 17400 states and 20022 transitions. [2021-11-23 16:57:26,513 INFO L78 Accepts]: Start accepts. Automaton has 17400 states and 20022 transitions. Word has length 118 [2021-11-23 16:57:26,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:26,513 INFO L470 AbstractCegarLoop]: Abstraction has 17400 states and 20022 transitions. [2021-11-23 16:57:26,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:26,513 INFO L276 IsEmpty]: Start isEmpty. Operand 17400 states and 20022 transitions. [2021-11-23 16:57:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 16:57:26,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:26,516 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:57:26,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (133)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:26,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (132)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:26,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:57:26,917 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:57:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:26,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1663700818, now seen corresponding path program 1 times [2021-11-23 16:57:26,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:26,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112139619] [2021-11-23 16:57:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:26,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:26,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:26,918 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:26,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2021-11-23 16:57:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:27,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:57:27,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:28,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:28,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:28,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112139619] [2021-11-23 16:57:28,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112139619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:28,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1655231314] [2021-11-23 16:57:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:28,690 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:28,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:28,691 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:28,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (135)] Waiting until timeout for monitored process [2021-11-23 16:57:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 16:57:29,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:33,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:37,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1655231314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:37,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295178772] [2021-11-23 16:57:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:37,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:37,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:37,264 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:57:37,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-11-23 16:57:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 16:57:37,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:40,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:43,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295178772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:43,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:57:43,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 24, 24, 19, 19] total 94 [2021-11-23 16:57:43,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395468414] [2021-11-23 16:57:43,379 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:57:43,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-23 16:57:43,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-23 16:57:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=8071, Unknown=0, NotChecked=0, Total=8742 [2021-11-23 16:57:43,381 INFO L87 Difference]: Start difference. First operand 17400 states and 20022 transitions. Second operand has 94 states, 94 states have (on average 6.372340425531915) internal successors, (599), 94 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:59,953 INFO L93 Difference]: Finished difference Result 28975 states and 33017 transitions. [2021-11-23 16:57:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-23 16:57:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 6.372340425531915) internal successors, (599), 94 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-23 16:57:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:59,989 INFO L225 Difference]: With dead ends: 28975 [2021-11-23 16:57:59,989 INFO L226 Difference]: Without dead ends: 27261 [2021-11-23 16:57:59,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 618 SyntacticMatches, 8 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 7378 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1983, Invalid=18897, Unknown=0, NotChecked=0, Total=20880 [2021-11-23 16:57:59,997 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 4376 mSDsluCounter, 17363 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4376 SdHoareTripleChecker+Valid, 17844 SdHoareTripleChecker+Invalid, 5442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2620 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:59,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4376 Valid, 17844 Invalid, 5442 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [115 Valid, 2707 Invalid, 0 Unknown, 2620 Unchecked, 3.3s Time] [2021-11-23 16:58:00,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27261 states. [2021-11-23 16:58:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27261 to 17446. [2021-11-23 16:58:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17446 states, 17445 states have (on average 1.1504729148753225) internal successors, (20070), 17445 states have internal predecessors, (20070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17446 states to 17446 states and 20070 transitions. [2021-11-23 16:58:03,908 INFO L78 Accepts]: Start accepts. Automaton has 17446 states and 20070 transitions. Word has length 118 [2021-11-23 16:58:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:03,908 INFO L470 AbstractCegarLoop]: Abstraction has 17446 states and 20070 transitions. [2021-11-23 16:58:03,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 6.372340425531915) internal successors, (599), 94 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:03,908 INFO L276 IsEmpty]: Start isEmpty. Operand 17446 states and 20070 transitions. [2021-11-23 16:58:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 16:58:03,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:03,911 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:58:03,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (134)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:04,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:04,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (135)] Ended with exit code 0 [2021-11-23 16:58:04,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:04,512 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:58:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2101560606, now seen corresponding path program 1 times [2021-11-23 16:58:04,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:04,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035432929] [2021-11-23 16:58:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:04,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:04,514 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:04,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2021-11-23 16:58:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:04,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:58:04,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:05,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:06,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:06,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035432929] [2021-11-23 16:58:06,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035432929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:06,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1985960274] [2021-11-23 16:58:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:06,317 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:06,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:58:06,318 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:58:06,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (138)] Waiting until timeout for monitored process [2021-11-23 16:58:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:58:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:07,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:08,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1985960274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:08,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564766918] [2021-11-23 16:58:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:08,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:58:08,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:58:08,178 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:58:08,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-11-23 16:58:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:08,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:58:08,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:09,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:09,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564766918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:09,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:58:09,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 14, 10, 11, 10] total 26 [2021-11-23 16:58:09,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709357920] [2021-11-23 16:58:09,622 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:58:09,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 16:58:09,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 16:58:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-11-23 16:58:09,623 INFO L87 Difference]: Start difference. First operand 17446 states and 20070 transitions. Second operand has 26 states, 26 states have (on average 10.26923076923077) internal successors, (267), 26 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:15,403 INFO L93 Difference]: Finished difference Result 23501 states and 26840 transitions. [2021-11-23 16:58:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 16:58:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 10.26923076923077) internal successors, (267), 26 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-23 16:58:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:15,430 INFO L225 Difference]: With dead ends: 23501 [2021-11-23 16:58:15,430 INFO L226 Difference]: Without dead ends: 21819 [2021-11-23 16:58:15,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 677 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 16:58:15,436 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 565 mSDsluCounter, 5175 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 5707 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:15,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 5707 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 454 Invalid, 0 Unknown, 263 Unchecked, 0.5s Time] [2021-11-23 16:58:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21819 states. [2021-11-23 16:58:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21819 to 17458. [2021-11-23 16:58:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17458 states, 17457 states have (on average 1.1503121956808158) internal successors, (20081), 17457 states have internal predecessors, (20081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17458 states to 17458 states and 20081 transitions. [2021-11-23 16:58:19,272 INFO L78 Accepts]: Start accepts. Automaton has 17458 states and 20081 transitions. Word has length 118 [2021-11-23 16:58:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:19,272 INFO L470 AbstractCegarLoop]: Abstraction has 17458 states and 20081 transitions. [2021-11-23 16:58:19,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.26923076923077) internal successors, (267), 26 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 17458 states and 20081 transitions. [2021-11-23 16:58:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 16:58:19,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:19,275 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:58:19,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (137)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:19,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:19,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (138)] Ended with exit code 0 [2021-11-23 16:58:19,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:19,876 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:58:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash 293276049, now seen corresponding path program 1 times [2021-11-23 16:58:19,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:19,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766561669] [2021-11-23 16:58:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:19,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:19,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:19,877 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:19,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2021-11-23 16:58:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:20,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 16:58:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:25,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:27,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:27,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766561669] [2021-11-23 16:58:27,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766561669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:27,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1421401689] [2021-11-23 16:58:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:27,339 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:27,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:58:27,339 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:58:27,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (141)] Waiting until timeout for monitored process [2021-11-23 16:58:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:27,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 16:58:27,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 16:58:31,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:58:31,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1421401689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:58:31,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:58:31,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [21, 16] total 46 [2021-11-23 16:58:31,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494881783] [2021-11-23 16:58:31,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:58:31,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:58:31,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:58:31,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1835, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 16:58:31,149 INFO L87 Difference]: Start difference. First operand 17458 states and 20081 transitions. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:35,048 INFO L93 Difference]: Finished difference Result 22124 states and 25498 transitions. [2021-11-23 16:58:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 16:58:35,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-23 16:58:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:35,068 INFO L225 Difference]: With dead ends: 22124 [2021-11-23 16:58:35,069 INFO L226 Difference]: Without dead ends: 17802 [2021-11-23 16:58:35,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 16:58:35,074 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 614 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 2617 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:35,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 2617 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 614 Unchecked, 0.1s Time] [2021-11-23 16:58:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17802 states. [2021-11-23 16:58:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17802 to 17458. [2021-11-23 16:58:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17458 states, 17457 states have (on average 1.1502549120696568) internal successors, (20080), 17457 states have internal predecessors, (20080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17458 states to 17458 states and 20080 transitions. [2021-11-23 16:58:38,717 INFO L78 Accepts]: Start accepts. Automaton has 17458 states and 20080 transitions. Word has length 118 [2021-11-23 16:58:38,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:38,717 INFO L470 AbstractCegarLoop]: Abstraction has 17458 states and 20080 transitions. [2021-11-23 16:58:38,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 16 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 17458 states and 20080 transitions. [2021-11-23 16:58:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 16:58:38,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:38,721 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:58:38,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (141)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:38,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (140)] Ended with exit code 0 [2021-11-23 16:58:39,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:58:39,126 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:58:39,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash -824350237, now seen corresponding path program 1 times [2021-11-23 16:58:39,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:39,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959161253] [2021-11-23 16:58:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:39,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:39,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:39,128 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:39,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2021-11-23 16:58:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:58:39,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:40,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:40,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:40,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959161253] [2021-11-23 16:58:40,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959161253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:40,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2008948067] [2021-11-23 16:58:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:40,846 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:40,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:58:40,847 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:58:40,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (143)] Waiting until timeout for monitored process [2021-11-23 16:58:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:41,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:58:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:42,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:42,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2008948067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:42,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764474235] [2021-11-23 16:58:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:42,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:58:42,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:58:42,614 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:58:42,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-11-23 16:58:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:58:42,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:43,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:43,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764474235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:43,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:58:43,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12, 9, 10, 9] total 23 [2021-11-23 16:58:43,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096603933] [2021-11-23 16:58:43,857 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:58:43,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 16:58:43,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 16:58:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-11-23 16:58:43,858 INFO L87 Difference]: Start difference. First operand 17458 states and 20080 transitions. Second operand has 23 states, 23 states have (on average 11.347826086956522) internal successors, (261), 23 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:51,609 INFO L93 Difference]: Finished difference Result 32940 states and 37806 transitions. [2021-11-23 16:58:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 16:58:51,610 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 11.347826086956522) internal successors, (261), 23 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-23 16:58:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:51,650 INFO L225 Difference]: With dead ends: 32940 [2021-11-23 16:58:51,650 INFO L226 Difference]: Without dead ends: 28751 [2021-11-23 16:58:51,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 688 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 16:58:51,659 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 1255 mSDsluCounter, 7454 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 8071 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 477 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:51,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1255 Valid, 8071 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 647 Invalid, 0 Unknown, 477 Unchecked, 0.5s Time] [2021-11-23 16:58:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28751 states. [2021-11-23 16:58:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28751 to 17559. [2021-11-23 16:58:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17559 states, 17558 states have (on average 1.1495614534685044) internal successors, (20184), 17558 states have internal predecessors, (20184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17559 states to 17559 states and 20184 transitions. [2021-11-23 16:58:55,798 INFO L78 Accepts]: Start accepts. Automaton has 17559 states and 20184 transitions. Word has length 119 [2021-11-23 16:58:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:55,798 INFO L470 AbstractCegarLoop]: Abstraction has 17559 states and 20184 transitions. [2021-11-23 16:58:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.347826086956522) internal successors, (261), 23 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 17559 states and 20184 transitions. [2021-11-23 16:58:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 16:58:55,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:55,801 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:58:55,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:56,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (143)] Ended with exit code 0 [2021-11-23 16:58:56,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (142)] Ended with exit code 0 [2021-11-23 16:58:56,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:58:56,402 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:58:56,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:56,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1682069594, now seen corresponding path program 1 times [2021-11-23 16:58:56,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:56,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327153495] [2021-11-23 16:58:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:56,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:56,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:56,404 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:56,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2021-11-23 16:58:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:56,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 16:58:56,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:01,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:01,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:01,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327153495] [2021-11-23 16:59:01,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327153495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:01,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:01,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-23 16:59:01,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994321517] [2021-11-23 16:59:01,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:01,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 16:59:01,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 16:59:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-23 16:59:01,332 INFO L87 Difference]: Start difference. First operand 17559 states and 20184 transitions. Second operand has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:05,436 INFO L93 Difference]: Finished difference Result 19812 states and 22787 transitions. [2021-11-23 16:59:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 16:59:05,436 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-23 16:59:05,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:05,457 INFO L225 Difference]: With dead ends: 19812 [2021-11-23 16:59:05,457 INFO L226 Difference]: Without dead ends: 18133 [2021-11-23 16:59:05,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-11-23 16:59:05,461 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 602 mSDsluCounter, 3799 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 4247 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 901 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:05,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 4247 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 901 Unchecked, 0.1s Time] [2021-11-23 16:59:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18133 states. [2021-11-23 16:59:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18133 to 17512. [2021-11-23 16:59:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17512 states, 17511 states have (on average 1.1498486665524528) internal successors, (20135), 17511 states have internal predecessors, (20135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17512 states to 17512 states and 20135 transitions. [2021-11-23 16:59:09,420 INFO L78 Accepts]: Start accepts. Automaton has 17512 states and 20135 transitions. Word has length 119 [2021-11-23 16:59:09,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:09,420 INFO L470 AbstractCegarLoop]: Abstraction has 17512 states and 20135 transitions. [2021-11-23 16:59:09,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:09,421 INFO L276 IsEmpty]: Start isEmpty. Operand 17512 states and 20135 transitions. [2021-11-23 16:59:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 16:59:09,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:09,423 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:59:09,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (145)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:09,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:09,624 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:59:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1549760772, now seen corresponding path program 1 times [2021-11-23 16:59:09,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:09,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723055478] [2021-11-23 16:59:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:09,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:09,626 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:09,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2021-11-23 16:59:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:09,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:59:09,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:10,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:11,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:11,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723055478] [2021-11-23 16:59:11,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723055478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:11,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2028331400] [2021-11-23 16:59:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:11,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:59:11,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:59:11,413 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:59:11,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (147)] Waiting until timeout for monitored process [2021-11-23 16:59:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:11,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 16:59:11,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:16,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:18,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2028331400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:18,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127117223] [2021-11-23 16:59:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:18,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:59:18,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:59:18,890 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:59:18,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-11-23 16:59:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:19,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 16:59:19,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:22,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:23,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127117223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:23,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:59:23,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 24, 19, 19, 19] total 74 [2021-11-23 16:59:23,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712562024] [2021-11-23 16:59:23,906 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:59:23,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-23 16:59:23,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-23 16:59:23,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=5025, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 16:59:23,908 INFO L87 Difference]: Start difference. First operand 17512 states and 20135 transitions. Second operand has 74 states, 74 states have (on average 7.162162162162162) internal successors, (530), 74 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:44,374 INFO L93 Difference]: Finished difference Result 43676 states and 49664 transitions. [2021-11-23 16:59:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-23 16:59:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 7.162162162162162) internal successors, (530), 74 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-23 16:59:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:44,429 INFO L225 Difference]: With dead ends: 43676 [2021-11-23 16:59:44,429 INFO L226 Difference]: Without dead ends: 41987 [2021-11-23 16:59:44,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 637 SyntacticMatches, 7 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 5000 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1236, Invalid=14766, Unknown=0, NotChecked=0, Total=16002 [2021-11-23 16:59:44,439 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 1458 mSDsluCounter, 18604 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 19314 SdHoareTripleChecker+Invalid, 4687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2236 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:44,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 19314 Invalid, 4687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2378 Invalid, 0 Unknown, 2236 Unchecked, 2.7s Time] [2021-11-23 16:59:44,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41987 states. [2021-11-23 16:59:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41987 to 17511. [2021-11-23 16:59:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17511 states, 17510 states have (on average 1.1497430039977157) internal successors, (20132), 17510 states have internal predecessors, (20132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17511 states to 17511 states and 20132 transitions. [2021-11-23 16:59:48,377 INFO L78 Accepts]: Start accepts. Automaton has 17511 states and 20132 transitions. Word has length 119 [2021-11-23 16:59:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:48,377 INFO L470 AbstractCegarLoop]: Abstraction has 17511 states and 20132 transitions. [2021-11-23 16:59:48,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 7.162162162162162) internal successors, (530), 74 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 17511 states and 20132 transitions. [2021-11-23 16:59:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 16:59:48,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:48,380 INFO L514 BasicCegarLoop]: 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] [2021-11-23 16:59:48,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (147)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:48,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:48,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (146)] Ended with exit code 0 [2021-11-23 16:59:48,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:48,981 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 16:59:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:48,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1513101777, now seen corresponding path program 1 times [2021-11-23 16:59:48,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:48,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757265973] [2021-11-23 16:59:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:48,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:48,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:48,983 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:48,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2021-11-23 16:59:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:49,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:59:49,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:50,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:50,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:50,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757265973] [2021-11-23 16:59:50,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757265973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:50,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1834800696] [2021-11-23 16:59:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:50,717 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:59:50,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:59:50,717 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:59:50,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (150)] Waiting until timeout for monitored process [2021-11-23 16:59:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:51,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:59:51,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:52,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:52,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1834800696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:52,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320785699] [2021-11-23 16:59:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:52,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:59:52,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:59:52,350 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:59:52,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-11-23 16:59:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:52,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:59:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:55,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:56,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320785699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:56,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:59:56,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 13, 10, 16, 12] total 38 [2021-11-23 16:59:56,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628803926] [2021-11-23 16:59:56,242 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:59:56,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-23 16:59:56,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:56,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-23 16:59:56,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 16:59:56,243 INFO L87 Difference]: Start difference. First operand 17511 states and 20132 transitions. Second operand has 38 states, 38 states have (on average 9.052631578947368) internal successors, (344), 38 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:01,595 INFO L93 Difference]: Finished difference Result 24050 states and 27774 transitions. [2021-11-23 17:00:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 17:00:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 9.052631578947368) internal successors, (344), 38 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-23 17:00:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:01,615 INFO L225 Difference]: With dead ends: 24050 [2021-11-23 17:00:01,615 INFO L226 Difference]: Without dead ends: 19903 [2021-11-23 17:00:01,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=292, Invalid=2464, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 17:00:01,621 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 328 mSDsluCounter, 10999 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 11451 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 966 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:01,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 11451 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 527 Invalid, 0 Unknown, 966 Unchecked, 0.5s Time] [2021-11-23 17:00:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19903 states. [2021-11-23 17:00:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19903 to 17638. [2021-11-23 17:00:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17638 states, 17637 states have (on average 1.1492884277371436) internal successors, (20270), 17637 states have internal predecessors, (20270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17638 states to 17638 states and 20270 transitions. [2021-11-23 17:00:05,540 INFO L78 Accepts]: Start accepts. Automaton has 17638 states and 20270 transitions. Word has length 119 [2021-11-23 17:00:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:05,540 INFO L470 AbstractCegarLoop]: Abstraction has 17638 states and 20270 transitions. [2021-11-23 17:00:05,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.052631578947368) internal successors, (344), 38 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:05,540 INFO L276 IsEmpty]: Start isEmpty. Operand 17638 states and 20270 transitions. [2021-11-23 17:00:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:00:05,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:05,543 INFO L514 BasicCegarLoop]: 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] [2021-11-23 17:00:05,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:05,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (149)] Ended with exit code 0 [2021-11-23 17:00:05,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (150)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:06,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:06,144 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 17:00:06,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:06,144 INFO L85 PathProgramCache]: Analyzing trace with hash -280588758, now seen corresponding path program 1 times [2021-11-23 17:00:06,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:06,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30984015] [2021-11-23 17:00:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:06,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:06,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:06,146 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:06,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2021-11-23 17:00:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:06,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 17:00:06,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:11,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:11,878 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:11,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30984015] [2021-11-23 17:00:11,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30984015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:11,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:11,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-23 17:00:11,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538012796] [2021-11-23 17:00:11,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:11,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 17:00:11,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:11,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 17:00:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:00:11,879 INFO L87 Difference]: Start difference. First operand 17638 states and 20270 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:17,585 INFO L93 Difference]: Finished difference Result 23148 states and 26697 transitions. [2021-11-23 17:00:17,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 17:00:17,585 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-23 17:00:17,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:17,608 INFO L225 Difference]: With dead ends: 23148 [2021-11-23 17:00:17,608 INFO L226 Difference]: Without dead ends: 21450 [2021-11-23 17:00:17,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-11-23 17:00:17,613 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 787 mSDsluCounter, 5189 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 5610 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1339 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:17,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 5610 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 1339 Unchecked, 0.1s Time] [2021-11-23 17:00:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21450 states. [2021-11-23 17:00:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21450 to 17609. [2021-11-23 17:00:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17609 states, 17608 states have (on average 1.1493071331213085) internal successors, (20237), 17608 states have internal predecessors, (20237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17609 states to 17609 states and 20237 transitions. [2021-11-23 17:00:21,502 INFO L78 Accepts]: Start accepts. Automaton has 17609 states and 20237 transitions. Word has length 119 [2021-11-23 17:00:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:21,502 INFO L470 AbstractCegarLoop]: Abstraction has 17609 states and 20237 transitions. [2021-11-23 17:00:21,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 17609 states and 20237 transitions. [2021-11-23 17:00:21,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:00:21,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:21,505 INFO L514 BasicCegarLoop]: 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] [2021-11-23 17:00:21,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (152)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:21,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:21,707 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 17:00:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:21,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1638013841, now seen corresponding path program 1 times [2021-11-23 17:00:21,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:21,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328775719] [2021-11-23 17:00:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:21,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:21,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:21,709 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:21,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2021-11-23 17:00:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:21,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:00:21,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:22,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:22,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:22,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328775719] [2021-11-23 17:00:22,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328775719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:22,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1450475133] [2021-11-23 17:00:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:22,665 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:22,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:00:22,666 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:00:22,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (154)] Waiting until timeout for monitored process [2021-11-23 17:00:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:23,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:00:23,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:24,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:25,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1450475133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:25,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301545616] [2021-11-23 17:00:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:25,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:00:25,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:00:25,333 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:00:25,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-11-23 17:00:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:25,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:00:25,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:26,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:27,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301545616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:27,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:00:27,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13, 11, 13, 11] total 33 [2021-11-23 17:00:27,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269373983] [2021-11-23 17:00:27,397 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:00:27,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 17:00:27,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 17:00:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 17:00:27,399 INFO L87 Difference]: Start difference. First operand 17609 states and 20237 transitions. Second operand has 33 states, 33 states have (on average 10.393939393939394) internal successors, (343), 33 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:33,278 INFO L93 Difference]: Finished difference Result 23037 states and 26349 transitions. [2021-11-23 17:00:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 17:00:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 10.393939393939394) internal successors, (343), 33 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-23 17:00:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:33,307 INFO L225 Difference]: With dead ends: 23037 [2021-11-23 17:00:33,307 INFO L226 Difference]: Without dead ends: 21355 [2021-11-23 17:00:33,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 674 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 17:00:33,315 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 320 mSDsluCounter, 6380 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 6910 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:33,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 6910 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 533 Invalid, 0 Unknown, 261 Unchecked, 0.5s Time] [2021-11-23 17:00:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21355 states. [2021-11-23 17:00:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21355 to 17612. [2021-11-23 17:00:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17612 states, 17611 states have (on average 1.1491113508602577) internal successors, (20237), 17611 states have internal predecessors, (20237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17612 states to 17612 states and 20237 transitions. [2021-11-23 17:00:37,633 INFO L78 Accepts]: Start accepts. Automaton has 17612 states and 20237 transitions. Word has length 119 [2021-11-23 17:00:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:37,634 INFO L470 AbstractCegarLoop]: Abstraction has 17612 states and 20237 transitions. [2021-11-23 17:00:37,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 10.393939393939394) internal successors, (343), 33 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 17612 states and 20237 transitions. [2021-11-23 17:00:37,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:00:37,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:37,636 INFO L514 BasicCegarLoop]: 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] [2021-11-23 17:00:37,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:37,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (153)] Ended with exit code 0 [2021-11-23 17:00:38,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (154)] Ended with exit code 0 [2021-11-23 17:00:38,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:38,237 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 17:00:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:38,238 INFO L85 PathProgramCache]: Analyzing trace with hash 957955471, now seen corresponding path program 1 times [2021-11-23 17:00:38,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:38,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038935831] [2021-11-23 17:00:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:38,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:38,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:38,239 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:38,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2021-11-23 17:00:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:38,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:00:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:00:39,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:39,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038935831] [2021-11-23 17:00:39,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038935831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:39,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:39,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 17:00:39,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751781913] [2021-11-23 17:00:39,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:39,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:00:39,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:00:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:00:39,558 INFO L87 Difference]: Start difference. First operand 17612 states and 20237 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:43,568 INFO L93 Difference]: Finished difference Result 19294 states and 22226 transitions. [2021-11-23 17:00:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:00:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-23 17:00:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:43,601 INFO L225 Difference]: With dead ends: 19294 [2021-11-23 17:00:43,602 INFO L226 Difference]: Without dead ends: 17388 [2021-11-23 17:00:43,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:00:43,607 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 45 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:43,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 2142 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2021-11-23 17:00:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17388 states. [2021-11-23 17:00:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17388 to 17386. [2021-11-23 17:00:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17386 states, 17385 states have (on average 1.1499568593615186) internal successors, (19992), 17385 states have internal predecessors, (19992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17386 states to 17386 states and 19992 transitions. [2021-11-23 17:00:47,655 INFO L78 Accepts]: Start accepts. Automaton has 17386 states and 19992 transitions. Word has length 119 [2021-11-23 17:00:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:47,656 INFO L470 AbstractCegarLoop]: Abstraction has 17386 states and 19992 transitions. [2021-11-23 17:00:47,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 17386 states and 19992 transitions. [2021-11-23 17:00:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 17:00:47,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:47,658 INFO L514 BasicCegarLoop]: 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] [2021-11-23 17:00:47,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (156)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:47,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:47,859 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-23 17:00:47,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:47,859 INFO L85 PathProgramCache]: Analyzing trace with hash 510465404, now seen corresponding path program 1 times [2021-11-23 17:00:47,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:47,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91835191] [2021-11-23 17:00:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:47,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:47,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:47,861 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:47,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2021-11-23 17:00:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:48,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 17:00:48,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:53,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:54,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:54,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91835191] [2021-11-23 17:00:54,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91835191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:54,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [512354037] [2021-11-23 17:00:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:54,955 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:54,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:00:54,957 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:00:54,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb60caee-ae92-4f43-baef-3f2f5c552f9f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (158)] Waiting until timeout for monitored process [2021-11-23 17:00:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:55,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 17:00:55,413 INFO L286 TraceCheckSpWp]: Computing forward predicates...