./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/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 cfa1fee5fdadabd96a5731bb0a647950318689cce856270fe55e6bf96a429cbb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:46:34,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:46:34,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:46:34,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:46:34,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:46:34,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:46:34,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:46:34,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:46:34,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:46:34,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:46:34,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:46:34,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:46:34,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:46:34,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:46:34,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:46:34,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:46:34,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:46:34,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:46:34,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:46:34,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:46:34,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:46:34,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:46:34,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:46:34,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:46:34,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:46:34,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:46:34,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:46:34,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:46:34,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:46:34,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:46:34,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:46:34,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:46:34,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:46:34,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:46:34,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:46:34,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:46:34,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:46:34,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:46:34,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:46:34,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:46:34,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:46:34,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:46:34,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:46:34,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:46:34,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:46:34,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:46:34,215 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:46:34,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:46:34,216 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:46:34,216 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:46:34,216 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:46:34,217 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:46:34,218 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:46:34,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:46:34,218 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:46:34,218 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:46:34,219 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:46:34,219 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:46:34,219 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:46:34,219 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:46:34,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:46:34,222 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:46:34,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:46:34,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:46:34,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:46:34,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:46:34,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:46:34,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:46:34,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:46:34,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:46:34,234 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:46:34,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:46:34,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:46:34,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:46:34,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:34,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:46:34,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:46:34,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:46:34,237 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:46:34,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:46:34,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:46:34,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:46:34,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:46:34,239 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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfa1fee5fdadabd96a5731bb0a647950318689cce856270fe55e6bf96a429cbb [2021-11-23 16:46:34,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:46:34,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:46:34,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:46:34,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:46:34,562 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:46:34,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-11-23 16:46:34,630 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/data/86dc35a7b/e571f49a315a4e1cbdbdc6870bc9e32a/FLAG6080266af [2021-11-23 16:46:35,504 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:46:35,505 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-11-23 16:46:35,542 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/data/86dc35a7b/e571f49a315a4e1cbdbdc6870bc9e32a/FLAG6080266af [2021-11-23 16:46:35,962 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/data/86dc35a7b/e571f49a315a4e1cbdbdc6870bc9e32a [2021-11-23 16:46:35,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:46:35,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:46:35,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:35,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:46:35,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:46:35,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:35" (1/1) ... [2021-11-23 16:46:35,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b172c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:35, skipping insertion in model container [2021-11-23 16:46:35,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:35" (1/1) ... [2021-11-23 16:46:35,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:46:36,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:46:36,505 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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c[20454,20467] [2021-11-23 16:46:36,538 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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c[23271,23284] [2021-11-23 16:46:37,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:37,366 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:46:37,449 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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c[20454,20467] [2021-11-23 16:46:37,454 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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c[23271,23284] [2021-11-23 16:46:38,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:38,048 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:46:38,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38 WrapperNode [2021-11-23 16:46:38,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:38,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:38,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:46:38,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:46:38,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38" (1/1) ... [2021-11-23 16:46:38,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38" (1/1) ... [2021-11-23 16:46:38,534 INFO L137 Inliner]: procedures = 39, calls = 24, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 5208 [2021-11-23 16:46:38,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:38,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:46:38,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:46:38,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:46:38,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38" (1/1) ... [2021-11-23 16:46:38,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38" (1/1) ... [2021-11-23 16:46:38,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38" (1/1) ... [2021-11-23 16:46:38,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38" (1/1) ... [2021-11-23 16:46:38,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38" (1/1) ... [2021-11-23 16:46:38,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38" (1/1) ... [2021-11-23 16:46:38,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38" (1/1) ... [2021-11-23 16:46:38,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:46:38,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:46:38,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:46:38,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:46:38,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:38" (1/1) ... [2021-11-23 16:46:38,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:38,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:39,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:46:39,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:46:39,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:46:39,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:46:39,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:46:39,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:46:39,392 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:46:39,406 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:46:43,996 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:46:44,066 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 16:46:44,076 INFO L158 Benchmark]: Toolchain (without parser) took 8107.38ms. Allocated memory was 119.5MB in the beginning and 616.6MB in the end (delta: 497.0MB). Free memory was 87.7MB in the beginning and 353.4MB in the end (delta: -265.7MB). Peak memory consumption was 233.1MB. Max. memory is 16.1GB. [2021-11-23 16:46:44,078 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 92.3MB. Free memory was 64.7MB in the beginning and 64.6MB in the end (delta: 23.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:46:44,079 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2080.64ms. Allocated memory was 119.5MB in the beginning and 174.1MB in the end (delta: 54.5MB). Free memory was 87.7MB in the beginning and 91.9MB in the end (delta: -4.2MB). Peak memory consumption was 69.6MB. Max. memory is 16.1GB. [2021-11-23 16:46:44,080 INFO L158 Benchmark]: Boogie Procedure Inliner took 484.85ms. Allocated memory is still 174.1MB. Free memory was 91.9MB in the beginning and 75.8MB in the end (delta: 16.1MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. [2021-11-23 16:46:44,081 INFO L158 Benchmark]: Boogie Preprocessor took 376.85ms. Allocated memory is still 174.1MB. Free memory was 75.8MB in the beginning and 50.3MB in the end (delta: 25.5MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. [2021-11-23 16:46:44,082 INFO L158 Benchmark]: RCFGBuilder took 5155.71ms. Allocated memory was 174.1MB in the beginning and 616.6MB in the end (delta: 442.5MB). Free memory was 50.3MB in the beginning and 353.4MB in the end (delta: -303.1MB). Peak memory consumption was 141.6MB. Max. memory is 16.1GB. [2021-11-23 16:46:44,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 92.3MB. Free memory was 64.7MB in the beginning and 64.6MB in the end (delta: 23.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2080.64ms. Allocated memory was 119.5MB in the beginning and 174.1MB in the end (delta: 54.5MB). Free memory was 87.7MB in the beginning and 91.9MB in the end (delta: -4.2MB). Peak memory consumption was 69.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 484.85ms. Allocated memory is still 174.1MB. Free memory was 91.9MB in the beginning and 75.8MB in the end (delta: 16.1MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 376.85ms. Allocated memory is still 174.1MB. Free memory was 75.8MB in the beginning and 50.3MB in the end (delta: 25.5MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. * RCFGBuilder took 5155.71ms. Allocated memory was 174.1MB in the beginning and 616.6MB in the end (delta: 442.5MB). Free memory was 50.3MB in the beginning and 353.4MB in the end (delta: -303.1MB). Peak memory consumption was 141.6MB. 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 16:46:44,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/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 cfa1fee5fdadabd96a5731bb0a647950318689cce856270fe55e6bf96a429cbb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:46:46,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:46:46,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:46:46,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:46:46,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:46:46,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:46:46,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:46:46,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:46:46,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:46:46,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:46:46,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:46:46,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:46:46,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:46:46,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:46:46,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:46:46,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:46:46,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:46:46,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:46:46,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:46:46,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:46:46,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:46:46,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:46:46,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:46:46,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:46:46,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:46:46,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:46:46,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:46:46,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:46:46,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:46:46,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:46:46,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:46:46,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:46:46,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:46:46,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:46:46,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:46:46,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:46:46,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:46:46,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:46:46,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:46:46,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:46:46,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:46:46,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:46:46,847 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:46:46,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:46:46,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:46:46,848 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:46:46,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:46:46,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:46:46,850 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:46:46,850 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:46:46,850 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:46:46,851 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:46:46,852 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:46:46,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:46:46,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:46:46,854 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:46:46,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:46:46,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:46:46,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:46:46,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:46:46,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:46:46,856 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:46:46,856 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:46:46,856 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:46:46,856 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:46:46,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:46:46,857 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:46:46,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:46:46,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:46:46,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:46:46,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:46:46,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:46,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:46:46,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:46:46,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:46:46,859 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:46:46,860 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:46,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:46:46,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:46:46,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:46:46,861 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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfa1fee5fdadabd96a5731bb0a647950318689cce856270fe55e6bf96a429cbb [2021-11-23 16:46:47,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:46:47,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:46:47,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:46:47,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:46:47,345 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:46:47,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-11-23 16:46:47,416 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/data/2fac88ad2/1c1968cde73c4f13a9e0da79802ce5dc/FLAG94c3b1cc0 [2021-11-23 16:46:48,346 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:46:48,347 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-11-23 16:46:48,386 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/data/2fac88ad2/1c1968cde73c4f13a9e0da79802ce5dc/FLAG94c3b1cc0 [2021-11-23 16:46:48,831 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/data/2fac88ad2/1c1968cde73c4f13a9e0da79802ce5dc [2021-11-23 16:46:48,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:46:48,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:46:48,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:48,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:46:48,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:46:48,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:48" (1/1) ... [2021-11-23 16:46:48,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d3676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:48, skipping insertion in model container [2021-11-23 16:46:48,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:48" (1/1) ... [2021-11-23 16:46:48,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:46:49,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:46:49,549 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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c[20454,20467] [2021-11-23 16:46:49,608 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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c[23271,23284] [2021-11-23 16:46:50,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:50,701 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:46:50,768 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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c[20454,20467] [2021-11-23 16:46:50,779 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_cb69e23e-0d58-460a-b127-3ed04dbb31d8/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c[23271,23284] [2021-11-23 16:46:51,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:51,444 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:46:51,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51 WrapperNode [2021-11-23 16:46:51,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:51,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:51,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:46:51,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:46:51,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (1/1) ... [2021-11-23 16:46:51,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (1/1) ... [2021-11-23 16:46:51,785 INFO L137 Inliner]: procedures = 40, calls = 24, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 5178 [2021-11-23 16:46:51,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:51,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:46:51,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:46:51,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:46:51,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (1/1) ... [2021-11-23 16:46:51,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (1/1) ... [2021-11-23 16:46:51,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (1/1) ... [2021-11-23 16:46:51,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (1/1) ... [2021-11-23 16:46:51,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (1/1) ... [2021-11-23 16:46:52,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (1/1) ... [2021-11-23 16:46:52,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (1/1) ... [2021-11-23 16:46:52,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:46:52,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:46:52,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:46:52,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:46:52,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (1/1) ... [2021-11-23 16:46:52,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:52,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:52,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:46:52,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:46:52,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:46:52,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:46:52,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:46:52,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:46:52,460 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:46:52,462 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:47:22,373 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:47:22,403 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:47:22,404 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 16:47:22,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:47:22 BoogieIcfgContainer [2021-11-23 16:47:22,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:47:22,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:47:22,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:47:22,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:47:22,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:46:48" (1/3) ... [2021-11-23 16:47:22,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7d2bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:47:22, skipping insertion in model container [2021-11-23 16:47:22,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:51" (2/3) ... [2021-11-23 16:47:22,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7d2bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:47:22, skipping insertion in model container [2021-11-23 16:47:22,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:47:22" (3/3) ... [2021-11-23 16:47:22,418 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label06.c [2021-11-23 16:47:22,424 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:47:22,425 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 16:47:22,488 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:47:22,497 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 16:47:22,497 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 16:47:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 946 states, 943 states have (on average 1.8971367974549311) internal successors, (1789), 945 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 16:47:22,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:22,551 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] [2021-11-23 16:47:22,552 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1985263371, now seen corresponding path program 1 times [2021-11-23 16:47:22,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:22,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402362981] [2021-11-23 16:47:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:22,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:22,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:22,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:22,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:47:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:22,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:47:22,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:22,926 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 16:47:22,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:22,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:22,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402362981] [2021-11-23 16:47:22,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402362981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:22,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:22,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:22,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508956407] [2021-11-23 16:47:22,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:22,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:22,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:22,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:22,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:23,005 INFO L87 Difference]: Start difference. First operand has 946 states, 943 states have (on average 1.8971367974549311) internal successors, (1789), 945 states have internal predecessors, (1789), 0 states have call successors, (0), 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 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:00,591 INFO L93 Difference]: Finished difference Result 2605 states and 4986 transitions. [2021-11-23 16:48:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:00,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 16:48:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:00,625 INFO L225 Difference]: With dead ends: 2605 [2021-11-23 16:48:00,625 INFO L226 Difference]: Without dead ends: 1631 [2021-11-23 16:48:00,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 16:48:00,637 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 1014 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:00,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 744 Invalid, 2979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 37.3s Time] [2021-11-23 16:48:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-11-23 16:48:00,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1631. [2021-11-23 16:48:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1629 states have (on average 1.6175567833026396) internal successors, (2635), 1630 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2635 transitions. [2021-11-23 16:48:00,810 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2635 transitions. Word has length 24 [2021-11-23 16:48:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:00,811 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 2635 transitions. [2021-11-23 16:48:00,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2635 transitions. [2021-11-23 16:48:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 16:48:00,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:00,822 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] [2021-11-23 16:48:00,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:01,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:01,030 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:01,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2021-11-23 16:48:01,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:01,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645686354] [2021-11-23 16:48:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:01,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:01,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:01,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:01,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:48:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:01,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:48:01,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:01,269 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 16:48:01,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:01,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:01,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645686354] [2021-11-23 16:48:01,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645686354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:01,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:01,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:48:01,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32817435] [2021-11-23 16:48:01,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:01,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:01,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:01,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:01,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:01,274 INFO L87 Difference]: Start difference. First operand 1631 states and 2635 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:01,439 INFO L93 Difference]: Finished difference Result 1705 states and 2750 transitions. [2021-11-23 16:48:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:48:01,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 16:48:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:01,455 INFO L225 Difference]: With dead ends: 1705 [2021-11-23 16:48:01,455 INFO L226 Difference]: Without dead ends: 1631 [2021-11-23 16:48:01,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:48:01,459 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 3 mSDsluCounter, 4909 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6563 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:01,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6563 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-11-23 16:48:01,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1631. [2021-11-23 16:48:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1629 states have (on average 1.5868631062001228) internal successors, (2585), 1630 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2585 transitions. [2021-11-23 16:48:01,519 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2585 transitions. Word has length 42 [2021-11-23 16:48:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:01,519 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 2585 transitions. [2021-11-23 16:48:01,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2585 transitions. [2021-11-23 16:48:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 16:48:01,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:01,526 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 16:48:01,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:01,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:01,742 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2021-11-23 16:48:01,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:01,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837586409] [2021-11-23 16:48:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:01,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:01,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:01,744 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:01,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:48:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:01,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:02,220 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 16:48:02,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:02,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:02,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837586409] [2021-11-23 16:48:02,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837586409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:02,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:02,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:02,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157905173] [2021-11-23 16:48:02,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:02,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:02,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:02,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:02,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:02,223 INFO L87 Difference]: Start difference. First operand 1631 states and 2585 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:02,273 INFO L93 Difference]: Finished difference Result 1765 states and 2797 transitions. [2021-11-23 16:48:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:02,285 INFO L225 Difference]: With dead ends: 1765 [2021-11-23 16:48:02,285 INFO L226 Difference]: Without dead ends: 1695 [2021-11-23 16:48:02,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 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 16:48:02,287 INFO L933 BasicCegarLoop]: 1674 mSDtfsCounter, 1532 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:02,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1532 Valid, 1791 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-11-23 16:48:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1693. [2021-11-23 16:48:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1691 states have (on average 1.5872264931992903) internal successors, (2684), 1692 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2684 transitions. [2021-11-23 16:48:02,337 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2684 transitions. Word has length 91 [2021-11-23 16:48:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:02,338 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 2684 transitions. [2021-11-23 16:48:02,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2684 transitions. [2021-11-23 16:48:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 16:48:02,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:02,340 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 16:48:02,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:02,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:02,557 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2021-11-23 16:48:02,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:02,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693773717] [2021-11-23 16:48:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:02,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:02,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:02,560 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:02,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:48:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:02,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:02,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:03,001 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 16:48:03,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:03,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:03,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693773717] [2021-11-23 16:48:03,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693773717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:03,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:03,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:03,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100538234] [2021-11-23 16:48:03,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:03,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:03,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:03,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:03,004 INFO L87 Difference]: Start difference. First operand 1693 states and 2684 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:03,059 INFO L93 Difference]: Finished difference Result 1945 states and 3084 transitions. [2021-11-23 16:48:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:03,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:03,074 INFO L225 Difference]: With dead ends: 1945 [2021-11-23 16:48:03,075 INFO L226 Difference]: Without dead ends: 1813 [2021-11-23 16:48:03,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 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 16:48:03,083 INFO L933 BasicCegarLoop]: 1669 mSDtfsCounter, 1528 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:03,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 1790 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-11-23 16:48:03,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1811. [2021-11-23 16:48:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1809 states have (on average 1.5870646766169154) internal successors, (2871), 1810 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2871 transitions. [2021-11-23 16:48:03,144 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2871 transitions. Word has length 91 [2021-11-23 16:48:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:03,147 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2871 transitions. [2021-11-23 16:48:03,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2871 transitions. [2021-11-23 16:48:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 16:48:03,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:03,149 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 16:48:03,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:03,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:03,370 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2021-11-23 16:48:03,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:03,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437537411] [2021-11-23 16:48:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:03,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:03,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:03,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:03,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:48:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:03,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:03,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:03,793 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 16:48:03,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:03,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:03,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437537411] [2021-11-23 16:48:03,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437537411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:03,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:03,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:03,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633857183] [2021-11-23 16:48:03,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:03,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:03,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:03,796 INFO L87 Difference]: Start difference. First operand 1811 states and 2871 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:03,882 INFO L93 Difference]: Finished difference Result 2287 states and 3625 transitions. [2021-11-23 16:48:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:03,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:03,895 INFO L225 Difference]: With dead ends: 2287 [2021-11-23 16:48:03,895 INFO L226 Difference]: Without dead ends: 2037 [2021-11-23 16:48:03,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 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 16:48:03,897 INFO L933 BasicCegarLoop]: 1664 mSDtfsCounter, 1524 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:03,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1789 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-11-23 16:48:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 2035. [2021-11-23 16:48:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 2033 states have (on average 1.5853418593212) internal successors, (3223), 2034 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3223 transitions. [2021-11-23 16:48:03,958 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3223 transitions. Word has length 91 [2021-11-23 16:48:03,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:03,959 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 3223 transitions. [2021-11-23 16:48:03,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:03,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3223 transitions. [2021-11-23 16:48:03,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 16:48:03,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:03,961 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 16:48:03,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:04,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:04,174 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2021-11-23 16:48:04,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:04,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717910358] [2021-11-23 16:48:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:04,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:04,176 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:04,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:48:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:04,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:04,580 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 16:48:04,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:04,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:04,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717910358] [2021-11-23 16:48:04,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717910358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:04,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:04,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:04,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946021501] [2021-11-23 16:48:04,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:04,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:04,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:04,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:04,583 INFO L87 Difference]: Start difference. First operand 2035 states and 3223 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:04,646 INFO L93 Difference]: Finished difference Result 2935 states and 4641 transitions. [2021-11-23 16:48:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:04,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:04,661 INFO L225 Difference]: With dead ends: 2935 [2021-11-23 16:48:04,662 INFO L226 Difference]: Without dead ends: 2461 [2021-11-23 16:48:04,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 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 16:48:04,664 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 1520 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:04,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1788 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-11-23 16:48:04,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2459. [2021-11-23 16:48:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2457 states have (on average 1.5803825803825804) internal successors, (3883), 2458 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 3883 transitions. [2021-11-23 16:48:04,742 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 3883 transitions. Word has length 91 [2021-11-23 16:48:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:04,743 INFO L470 AbstractCegarLoop]: Abstraction has 2459 states and 3883 transitions. [2021-11-23 16:48:04,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:04,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 3883 transitions. [2021-11-23 16:48:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 16:48:04,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:04,745 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 16:48:04,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 16:48:04,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:04,958 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:04,958 INFO L85 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2021-11-23 16:48:04,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:04,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127339481] [2021-11-23 16:48:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:04,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:04,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:04,960 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:04,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:48:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:05,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:05,332 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 16:48:05,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:05,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:05,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127339481] [2021-11-23 16:48:05,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127339481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:05,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:05,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:05,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765097107] [2021-11-23 16:48:05,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:05,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:05,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:05,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:05,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:05,334 INFO L87 Difference]: Start difference. First operand 2459 states and 3883 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:05,417 INFO L93 Difference]: Finished difference Result 4159 states and 6541 transitions. [2021-11-23 16:48:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:05,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:05,437 INFO L225 Difference]: With dead ends: 4159 [2021-11-23 16:48:05,437 INFO L226 Difference]: Without dead ends: 3261 [2021-11-23 16:48:05,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 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 16:48:05,440 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 1516 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:05,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1787 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-11-23 16:48:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 3259. [2021-11-23 16:48:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3257 states have (on average 1.5704636168252994) internal successors, (5115), 3258 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 5115 transitions. [2021-11-23 16:48:05,576 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 5115 transitions. Word has length 91 [2021-11-23 16:48:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:05,577 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 5115 transitions. [2021-11-23 16:48:05,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 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 16:48:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 5115 transitions. [2021-11-23 16:48:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 16:48:05,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:05,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:48:05,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 16:48:05,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:05,791 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2021-11-23 16:48:05,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:05,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031989090] [2021-11-23 16:48:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:05,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:05,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:05,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:48:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:05,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:48:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:08,786 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 16:48:08,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:08,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:08,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031989090] [2021-11-23 16:48:08,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031989090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:08,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:08,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:48:08,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858847347] [2021-11-23 16:48:08,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:08,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:48:08,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:08,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:48:08,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:48:08,789 INFO L87 Difference]: Start difference. First operand 3259 states and 5115 transitions. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 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 16:48:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:09,799 INFO L93 Difference]: Finished difference Result 16843 states and 26243 transitions. [2021-11-23 16:48:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:48:09,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 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 16:48:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:09,893 INFO L225 Difference]: With dead ends: 16843 [2021-11-23 16:48:09,894 INFO L226 Difference]: Without dead ends: 15145 [2021-11-23 16:48:09,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:48:09,900 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 5582 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5582 SdHoareTripleChecker+Valid, 2505 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:09,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5582 Valid, 2505 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:48:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15145 states. [2021-11-23 16:48:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15145 to 6651. [2021-11-23 16:48:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6651 states, 6649 states have (on average 1.5489547300345916) internal successors, (10299), 6650 states have internal predecessors, (10299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6651 states to 6651 states and 10299 transitions. [2021-11-23 16:48:10,327 INFO L78 Accepts]: Start accepts. Automaton has 6651 states and 10299 transitions. Word has length 91 [2021-11-23 16:48:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:10,327 INFO L470 AbstractCegarLoop]: Abstraction has 6651 states and 10299 transitions. [2021-11-23 16:48:10,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 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 16:48:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6651 states and 10299 transitions. [2021-11-23 16:48:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 16:48:10,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:10,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:10,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:10,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:10,543 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1621380862, now seen corresponding path program 1 times [2021-11-23 16:48:10,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:10,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009522881] [2021-11-23 16:48:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:10,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:10,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:10,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:10,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:48:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:10,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:10,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:10,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:10,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:10,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009522881] [2021-11-23 16:48:10,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009522881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:10,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:10,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:48:10,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153156022] [2021-11-23 16:48:10,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:10,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:10,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:10,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:10,996 INFO L87 Difference]: Start difference. First operand 6651 states and 10299 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 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 16:48:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:49,980 INFO L93 Difference]: Finished difference Result 9657 states and 15130 transitions. [2021-11-23 16:48:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:49,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 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 16:48:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:49,997 INFO L225 Difference]: With dead ends: 9657 [2021-11-23 16:48:49,997 INFO L226 Difference]: Without dead ends: 8153 [2021-11-23 16:48:50,000 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 16:48:50,001 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 867 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:50,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 782 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 38.6s Time] [2021-11-23 16:48:50,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8153 states. [2021-11-23 16:48:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8153 to 8153. [2021-11-23 16:48:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8153 states, 8151 states have (on average 1.4927002821739663) internal successors, (12167), 8152 states have internal predecessors, (12167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8153 states to 8153 states and 12167 transitions. [2021-11-23 16:48:50,337 INFO L78 Accepts]: Start accepts. Automaton has 8153 states and 12167 transitions. Word has length 92 [2021-11-23 16:48:50,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:50,337 INFO L470 AbstractCegarLoop]: Abstraction has 8153 states and 12167 transitions. [2021-11-23 16:48:50,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 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 16:48:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 8153 states and 12167 transitions. [2021-11-23 16:48:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 16:48:50,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:50,340 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, 1, 1] [2021-11-23 16:48:50,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:50,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:50,552 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:50,553 INFO L85 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2021-11-23 16:48:50,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:50,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78466177] [2021-11-23 16:48:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:50,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:50,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:50,554 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:50,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:48:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:50,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:50,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:50,955 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 16:48:50,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:50,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:50,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78466177] [2021-11-23 16:48:50,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78466177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:50,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:50,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:50,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732429642] [2021-11-23 16:48:50,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:50,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:50,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:50,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:50,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:50,958 INFO L87 Difference]: Start difference. First operand 8153 states and 12167 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 16:48:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:51,339 INFO L93 Difference]: Finished difference Result 17821 states and 26921 transitions. [2021-11-23 16:48:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:51,340 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 16:48:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:51,407 INFO L225 Difference]: With dead ends: 17821 [2021-11-23 16:48:51,407 INFO L226 Difference]: Without dead ends: 12731 [2021-11-23 16:48:51,415 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 16:48:51,416 INFO L933 BasicCegarLoop]: 1602 mSDtfsCounter, 1507 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:51,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1706 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12731 states. [2021-11-23 16:48:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12731 to 12633. [2021-11-23 16:48:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12633 states, 12631 states have (on average 1.4838888449053915) internal successors, (18743), 12632 states have internal predecessors, (18743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12633 states to 12633 states and 18743 transitions. [2021-11-23 16:48:52,227 INFO L78 Accepts]: Start accepts. Automaton has 12633 states and 18743 transitions. Word has length 93 [2021-11-23 16:48:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:52,227 INFO L470 AbstractCegarLoop]: Abstraction has 12633 states and 18743 transitions. [2021-11-23 16:48:52,228 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 16:48:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 12633 states and 18743 transitions. [2021-11-23 16:48:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 16:48:52,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:52,230 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, 1, 1] [2021-11-23 16:48:52,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:52,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:52,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:52,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:52,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2021-11-23 16:48:52,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:52,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359136794] [2021-11-23 16:48:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:52,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:52,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:52,445 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:52,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:48:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:52,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:52,847 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 16:48:52,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:52,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:52,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359136794] [2021-11-23 16:48:52,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359136794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:52,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:52,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:52,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115340158] [2021-11-23 16:48:52,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:52,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:52,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:52,849 INFO L87 Difference]: Start difference. First operand 12633 states and 18743 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 16:48:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:53,682 INFO L93 Difference]: Finished difference Result 30621 states and 45625 transitions. [2021-11-23 16:48:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:53,682 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 16:48:53,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:53,735 INFO L225 Difference]: With dead ends: 30621 [2021-11-23 16:48:53,735 INFO L226 Difference]: Without dead ends: 21051 [2021-11-23 16:48:53,750 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 16:48:53,751 INFO L933 BasicCegarLoop]: 1688 mSDtfsCounter, 1536 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:53,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1536 Valid, 1801 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:53,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21051 states. [2021-11-23 16:48:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21051 to 21049. [2021-11-23 16:48:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21049 states, 21047 states have (on average 1.474366893143916) internal successors, (31031), 21048 states have internal predecessors, (31031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21049 states to 21049 states and 31031 transitions. [2021-11-23 16:48:54,708 INFO L78 Accepts]: Start accepts. Automaton has 21049 states and 31031 transitions. Word has length 93 [2021-11-23 16:48:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:54,709 INFO L470 AbstractCegarLoop]: Abstraction has 21049 states and 31031 transitions. [2021-11-23 16:48:54,709 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 16:48:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 21049 states and 31031 transitions. [2021-11-23 16:48:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 16:48:54,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:54,711 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, 1, 1, 1] [2021-11-23 16:48:54,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:54,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:54,924 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2021-11-23 16:48:54,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:54,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301759636] [2021-11-23 16:48:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:54,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:54,926 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:54,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:48:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:55,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:48:55,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:55,230 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 16:48:55,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:55,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301759636] [2021-11-23 16:48:55,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301759636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:55,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:55,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:48:55,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983902020] [2021-11-23 16:48:55,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:55,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:55,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:55,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:55,233 INFO L87 Difference]: Start difference. First operand 21049 states and 31031 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:56,599 INFO L93 Difference]: Finished difference Result 34940 states and 51265 transitions. [2021-11-23 16:48:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:48:56,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-23 16:48:56,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:56,658 INFO L225 Difference]: With dead ends: 34940 [2021-11-23 16:48:56,659 INFO L226 Difference]: Without dead ends: 34938 [2021-11-23 16:48:56,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:48:56,669 INFO L933 BasicCegarLoop]: 1662 mSDtfsCounter, 303 mSDsluCounter, 4820 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:56,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 6482 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34938 states. [2021-11-23 16:48:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34938 to 21817. [2021-11-23 16:48:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21817 states, 21815 states have (on average 1.4547329818931927) internal successors, (31735), 21816 states have internal predecessors, (31735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 31735 transitions. [2021-11-23 16:48:57,935 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 31735 transitions. Word has length 94 [2021-11-23 16:48:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:57,935 INFO L470 AbstractCegarLoop]: Abstraction has 21817 states and 31735 transitions. [2021-11-23 16:48:57,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 31735 transitions. [2021-11-23 16:48:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 16:48:57,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:57,938 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, 1, 1, 1, 1] [2021-11-23 16:48:57,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:58,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:58,151 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2021-11-23 16:48:58,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:58,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504815125] [2021-11-23 16:48:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:58,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:58,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:58,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:58,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:48:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:58,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:58,532 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 16:48:58,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:58,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:58,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504815125] [2021-11-23 16:48:58,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504815125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:58,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:58,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:58,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922694590] [2021-11-23 16:48:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:58,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:58,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:58,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:58,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:58,535 INFO L87 Difference]: Start difference. First operand 21817 states and 31735 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:59,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:59,690 INFO L93 Difference]: Finished difference Result 40640 states and 59581 transitions. [2021-11-23 16:48:59,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:59,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 16:48:59,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:59,745 INFO L225 Difference]: With dead ends: 40640 [2021-11-23 16:48:59,745 INFO L226 Difference]: Without dead ends: 30461 [2021-11-23 16:48:59,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 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 16:48:59,765 INFO L933 BasicCegarLoop]: 1696 mSDtfsCounter, 1537 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:59,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1805 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30461 states. [2021-11-23 16:49:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30461 to 30459. [2021-11-23 16:49:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30459 states, 30457 states have (on average 1.4517844830416653) internal successors, (44217), 30458 states have internal predecessors, (44217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30459 states to 30459 states and 44217 transitions. [2021-11-23 16:49:01,379 INFO L78 Accepts]: Start accepts. Automaton has 30459 states and 44217 transitions. Word has length 95 [2021-11-23 16:49:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:01,379 INFO L470 AbstractCegarLoop]: Abstraction has 30459 states and 44217 transitions. [2021-11-23 16:49:01,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 30459 states and 44217 transitions. [2021-11-23 16:49:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 16:49:01,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:01,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:01,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:01,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:01,582 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1530762731, now seen corresponding path program 1 times [2021-11-23 16:49:01,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:01,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730405532] [2021-11-23 16:49:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:01,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:01,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:01,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:01,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:49:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:01,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:01,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:01,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:01,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730405532] [2021-11-23 16:49:01,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730405532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:01,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:01,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:49:01,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672005475] [2021-11-23 16:49:01,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:01,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:01,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:01,995 INFO L87 Difference]: Start difference. First operand 30459 states and 44217 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 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 16:49:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:47,023 INFO L93 Difference]: Finished difference Result 36471 states and 52785 transitions. [2021-11-23 16:49:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 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 99 [2021-11-23 16:49:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:47,073 INFO L225 Difference]: With dead ends: 36471 [2021-11-23 16:49:47,074 INFO L226 Difference]: Without dead ends: 33465 [2021-11-23 16:49:47,084 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 16:49:47,085 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 1082 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:47,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 750 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 44.0s Time] [2021-11-23 16:49:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33465 states. [2021-11-23 16:49:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33465 to 33463. [2021-11-23 16:49:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33463 states, 33461 states have (on average 1.432055228474941) internal successors, (47918), 33462 states have internal predecessors, (47918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33463 states to 33463 states and 47918 transitions. [2021-11-23 16:49:48,837 INFO L78 Accepts]: Start accepts. Automaton has 33463 states and 47918 transitions. Word has length 99 [2021-11-23 16:49:48,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:48,838 INFO L470 AbstractCegarLoop]: Abstraction has 33463 states and 47918 transitions. [2021-11-23 16:49:48,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 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 16:49:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 33463 states and 47918 transitions. [2021-11-23 16:49:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-23 16:49:48,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:48,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:48,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 16:49:49,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:49,069 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:49,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1202553482, now seen corresponding path program 1 times [2021-11-23 16:49:49,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:49,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556866808] [2021-11-23 16:49:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:49,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:49,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:49,071 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:49,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:49:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:49,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:49,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:49,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:49,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556866808] [2021-11-23 16:49:49,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556866808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:49,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:49,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:49:49,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527278616] [2021-11-23 16:49:49,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:49,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:49,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:49,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:49,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:49,471 INFO L87 Difference]: Start difference. First operand 33463 states and 47918 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:50,485 INFO L93 Difference]: Finished difference Result 52321 states and 75614 transitions. [2021-11-23 16:49:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-23 16:49:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:50,513 INFO L225 Difference]: With dead ends: 52321 [2021-11-23 16:49:50,514 INFO L226 Difference]: Without dead ends: 24927 [2021-11-23 16:49:50,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 128 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 16:49:50,541 INFO L933 BasicCegarLoop]: 1662 mSDtfsCounter, 72 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 3252 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:50,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 3252 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:49:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24927 states. [2021-11-23 16:49:51,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24927 to 24925. [2021-11-23 16:49:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24925 states, 24923 states have (on average 1.4262729205954339) internal successors, (35547), 24924 states have internal predecessors, (35547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24925 states to 24925 states and 35547 transitions. [2021-11-23 16:49:51,580 INFO L78 Accepts]: Start accepts. Automaton has 24925 states and 35547 transitions. Word has length 130 [2021-11-23 16:49:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:51,581 INFO L470 AbstractCegarLoop]: Abstraction has 24925 states and 35547 transitions. [2021-11-23 16:49:51,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:51,581 INFO L276 IsEmpty]: Start isEmpty. Operand 24925 states and 35547 transitions. [2021-11-23 16:49:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 16:49:51,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:51,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:51,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-23 16:49:51,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:51,806 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash 61538383, now seen corresponding path program 1 times [2021-11-23 16:49:51,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:51,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649232791] [2021-11-23 16:49:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:51,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:51,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:51,808 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:51,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:49:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:51,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:51,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:52,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:52,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:52,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649232791] [2021-11-23 16:49:52,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649232791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:52,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:52,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:49:52,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071229477] [2021-11-23 16:49:52,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:52,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:52,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:52,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:52,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:52,213 INFO L87 Difference]: Start difference. First operand 24925 states and 35547 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:52,699 INFO L93 Difference]: Finished difference Result 34337 states and 49277 transitions. [2021-11-23 16:49:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:52,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 16:49:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:52,718 INFO L225 Difference]: With dead ends: 34337 [2021-11-23 16:49:52,718 INFO L226 Difference]: Without dead ends: 15519 [2021-11-23 16:49:52,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 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 16:49:52,731 INFO L933 BasicCegarLoop]: 1655 mSDtfsCounter, 64 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 3237 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:52,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 3237 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:49:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15519 states. [2021-11-23 16:49:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15519 to 15517. [2021-11-23 16:49:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15517 states, 15515 states have (on average 1.4001289075088623) internal successors, (21723), 15516 states have internal predecessors, (21723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15517 states to 15517 states and 21723 transitions. [2021-11-23 16:49:53,376 INFO L78 Accepts]: Start accepts. Automaton has 15517 states and 21723 transitions. Word has length 132 [2021-11-23 16:49:53,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:53,377 INFO L470 AbstractCegarLoop]: Abstraction has 15517 states and 21723 transitions. [2021-11-23 16:49:53,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 15517 states and 21723 transitions. [2021-11-23 16:49:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 16:49:53,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:53,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:49:53,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:53,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:53,595 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:53,595 INFO L85 PathProgramCache]: Analyzing trace with hash 802970585, now seen corresponding path program 1 times [2021-11-23 16:49:53,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:53,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114807280] [2021-11-23 16:49:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:53,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:53,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:53,597 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:53,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:49:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:53,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:57,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:57,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:57,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114807280] [2021-11-23 16:49:57,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114807280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:57,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [632740811] [2021-11-23 16:49:57,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:57,996 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:57,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:57,997 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:58,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 16:49:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:58,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:00,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:01,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [632740811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:01,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264367206] [2021-11-23 16:50:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:01,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:01,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:01,321 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:01,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 16:50:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:01,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:01,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:03,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:04,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264367206] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:04,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:04,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:50:04,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866554473] [2021-11-23 16:50:04,564 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:04,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:50:04,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:04,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:50:04,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:50:04,567 INFO L87 Difference]: Start difference. First operand 15517 states and 21723 transitions. Second operand has 16 states, 16 states have (on average 14.8125) internal successors, (237), 15 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:05,446 INFO L93 Difference]: Finished difference Result 25168 states and 35608 transitions. [2021-11-23 16:50:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:50:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.8125) internal successors, (237), 15 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 16:50:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:05,470 INFO L225 Difference]: With dead ends: 25168 [2021-11-23 16:50:05,471 INFO L226 Difference]: Without dead ends: 15758 [2021-11-23 16:50:05,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:50:05,483 INFO L933 BasicCegarLoop]: 1576 mSDtfsCounter, 4454 mSDsluCounter, 11161 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4454 SdHoareTripleChecker+Valid, 12737 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:05,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4454 Valid, 12737 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2021-11-23 16:50:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15758 states. [2021-11-23 16:50:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15758 to 15566. [2021-11-23 16:50:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15566 states, 15564 states have (on average 1.3994474428167567) internal successors, (21781), 15565 states have internal predecessors, (21781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15566 states to 15566 states and 21781 transitions. [2021-11-23 16:50:06,238 INFO L78 Accepts]: Start accepts. Automaton has 15566 states and 21781 transitions. Word has length 132 [2021-11-23 16:50:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:06,238 INFO L470 AbstractCegarLoop]: Abstraction has 15566 states and 21781 transitions. [2021-11-23 16:50:06,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.8125) internal successors, (237), 15 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 15566 states and 21781 transitions. [2021-11-23 16:50:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 16:50:06,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:06,242 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:06,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-23 16:50:06,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:06,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-23 16:50:06,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:06,845 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash 613754809, now seen corresponding path program 1 times [2021-11-23 16:50:06,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:06,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861745792] [2021-11-23 16:50:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:06,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:06,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:06,847 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:06,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:50:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:08,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:09,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:09,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861745792] [2021-11-23 16:50:09,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861745792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:09,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1369175437] [2021-11-23 16:50:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:09,852 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:09,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:09,862 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:09,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 16:50:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:10,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:10,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:11,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:12,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1369175437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:12,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826822849] [2021-11-23 16:50:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:12,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:12,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:12,887 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:12,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 16:50:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:12,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:50:12,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:14,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:15,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826822849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:15,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:15,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:50:15,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674962415] [2021-11-23 16:50:15,580 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:15,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:50:15,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:50:15,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:50:15,582 INFO L87 Difference]: Start difference. First operand 15566 states and 21781 transitions. Second operand has 16 states, 16 states have (on average 14.4375) internal successors, (231), 15 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:16,202 INFO L93 Difference]: Finished difference Result 24976 states and 35414 transitions. [2021-11-23 16:50:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:50:16,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.4375) internal successors, (231), 15 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 16:50:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:16,224 INFO L225 Difference]: With dead ends: 24976 [2021-11-23 16:50:16,224 INFO L226 Difference]: Without dead ends: 15566 [2021-11-23 16:50:16,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:50:16,233 INFO L933 BasicCegarLoop]: 1578 mSDtfsCounter, 2969 mSDsluCounter, 14099 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2969 SdHoareTripleChecker+Valid, 15677 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:16,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2969 Valid, 15677 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2021-11-23 16:50:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15566 states. [2021-11-23 16:50:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15566 to 15566. [2021-11-23 16:50:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15566 states, 15564 states have (on average 1.3993831919814959) internal successors, (21780), 15565 states have internal predecessors, (21780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15566 states to 15566 states and 21780 transitions. [2021-11-23 16:50:16,868 INFO L78 Accepts]: Start accepts. Automaton has 15566 states and 21780 transitions. Word has length 132 [2021-11-23 16:50:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:16,868 INFO L470 AbstractCegarLoop]: Abstraction has 15566 states and 21780 transitions. [2021-11-23 16:50:16,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.4375) internal successors, (231), 15 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 15566 states and 21780 transitions. [2021-11-23 16:50:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 16:50:16,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:16,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:16,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:17,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:17,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-23 16:50:17,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:17,477 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:17,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:17,477 INFO L85 PathProgramCache]: Analyzing trace with hash 787451867, now seen corresponding path program 1 times [2021-11-23 16:50:17,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:17,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967166361] [2021-11-23 16:50:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:17,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:17,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:17,479 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:17,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 16:50:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:17,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:50:17,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 16:50:18,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:18,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:18,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967166361] [2021-11-23 16:50:18,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967166361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:18,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:18,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:50:18,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302747187] [2021-11-23 16:50:18,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:18,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:50:18,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:50:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:18,598 INFO L87 Difference]: Start difference. First operand 15566 states and 21780 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:19,320 INFO L93 Difference]: Finished difference Result 24989 states and 35426 transitions. [2021-11-23 16:50:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:50:19,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 16:50:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:19,342 INFO L225 Difference]: With dead ends: 24989 [2021-11-23 16:50:19,342 INFO L226 Difference]: Without dead ends: 15566 [2021-11-23 16:50:19,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:50:19,352 INFO L933 BasicCegarLoop]: 1583 mSDtfsCounter, 1492 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 4775 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:19,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 4775 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-11-23 16:50:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15566 states. [2021-11-23 16:50:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15566 to 15566. [2021-11-23 16:50:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15566 states, 15564 states have (on average 1.399318941146235) internal successors, (21779), 15565 states have internal predecessors, (21779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15566 states to 15566 states and 21779 transitions. [2021-11-23 16:50:20,032 INFO L78 Accepts]: Start accepts. Automaton has 15566 states and 21779 transitions. Word has length 132 [2021-11-23 16:50:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:20,032 INFO L470 AbstractCegarLoop]: Abstraction has 15566 states and 21779 transitions. [2021-11-23 16:50:20,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 15566 states and 21779 transitions. [2021-11-23 16:50:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 16:50:20,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:20,035 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:20,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:20,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:20,236 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1246871259, now seen corresponding path program 1 times [2021-11-23 16:50:20,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:20,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923952423] [2021-11-23 16:50:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:20,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:20,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:20,237 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:20,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 16:50:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:50:20,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:50:21,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:21,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:21,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923952423] [2021-11-23 16:50:21,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923952423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:21,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:21,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:50:21,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171569109] [2021-11-23 16:50:21,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:21,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:50:21,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:21,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:50:21,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:21,279 INFO L87 Difference]: Start difference. First operand 15566 states and 21779 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:21,748 INFO L93 Difference]: Finished difference Result 24993 states and 35430 transitions. [2021-11-23 16:50:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:50:21,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 16:50:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:21,767 INFO L225 Difference]: With dead ends: 24993 [2021-11-23 16:50:21,767 INFO L226 Difference]: Without dead ends: 15566 [2021-11-23 16:50:21,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:50:21,778 INFO L933 BasicCegarLoop]: 1586 mSDtfsCounter, 2940 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2940 SdHoareTripleChecker+Valid, 3190 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:21,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2940 Valid, 3190 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2021-11-23 16:50:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15566 states. [2021-11-23 16:50:22,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15566 to 15566. [2021-11-23 16:50:22,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15566 states, 15564 states have (on average 1.399254690310974) internal successors, (21778), 15565 states have internal predecessors, (21778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15566 states to 15566 states and 21778 transitions. [2021-11-23 16:50:22,346 INFO L78 Accepts]: Start accepts. Automaton has 15566 states and 21778 transitions. Word has length 132 [2021-11-23 16:50:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:22,347 INFO L470 AbstractCegarLoop]: Abstraction has 15566 states and 21778 transitions. [2021-11-23 16:50:22,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 15566 states and 21778 transitions. [2021-11-23 16:50:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 16:50:22,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:22,351 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:22,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:22,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:22,551 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2063887835, now seen corresponding path program 1 times [2021-11-23 16:50:22,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:22,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628321302] [2021-11-23 16:50:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:22,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:22,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:22,553 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:22,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 16:50:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:22,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:50:22,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 16:50:23,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:23,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:23,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628321302] [2021-11-23 16:50:23,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628321302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:23,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:23,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:50:23,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620972918] [2021-11-23 16:50:23,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:23,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:50:23,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:50:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:23,628 INFO L87 Difference]: Start difference. First operand 15566 states and 21778 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:24,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:24,103 INFO L93 Difference]: Finished difference Result 24997 states and 35434 transitions. [2021-11-23 16:50:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:50:24,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 16:50:24,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:24,119 INFO L225 Difference]: With dead ends: 24997 [2021-11-23 16:50:24,119 INFO L226 Difference]: Without dead ends: 15566 [2021-11-23 16:50:24,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:50:24,131 INFO L933 BasicCegarLoop]: 1589 mSDtfsCounter, 2934 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2934 SdHoareTripleChecker+Valid, 3255 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:24,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2934 Valid, 3255 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-11-23 16:50:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15566 states. [2021-11-23 16:50:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15566 to 15566. [2021-11-23 16:50:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15566 states, 15564 states have (on average 1.399190439475713) internal successors, (21777), 15565 states have internal predecessors, (21777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15566 states to 15566 states and 21777 transitions. [2021-11-23 16:50:24,669 INFO L78 Accepts]: Start accepts. Automaton has 15566 states and 21777 transitions. Word has length 132 [2021-11-23 16:50:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:24,670 INFO L470 AbstractCegarLoop]: Abstraction has 15566 states and 21777 transitions. [2021-11-23 16:50:24,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 15566 states and 21777 transitions. [2021-11-23 16:50:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 16:50:24,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:24,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:24,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:24,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:24,881 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:24,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1530422053, now seen corresponding path program 1 times [2021-11-23 16:50:24,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:24,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988872881] [2021-11-23 16:50:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:24,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:24,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:24,884 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:24,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 16:50:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:50:24,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 16:50:25,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:25,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:25,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988872881] [2021-11-23 16:50:25,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988872881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:25,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:25,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:50:25,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496474056] [2021-11-23 16:50:25,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:25,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:50:25,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:25,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:50:25,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:25,974 INFO L87 Difference]: Start difference. First operand 15566 states and 21777 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:26,721 INFO L93 Difference]: Finished difference Result 25001 states and 35438 transitions. [2021-11-23 16:50:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:50:26,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 16:50:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:26,740 INFO L225 Difference]: With dead ends: 25001 [2021-11-23 16:50:26,740 INFO L226 Difference]: Without dead ends: 15566 [2021-11-23 16:50:26,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:50:26,749 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 1480 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 3305 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:26,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 3305 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-11-23 16:50:26,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15566 states. [2021-11-23 16:50:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15566 to 15566. [2021-11-23 16:50:27,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15566 states, 15564 states have (on average 1.3991261886404522) internal successors, (21776), 15565 states have internal predecessors, (21776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15566 states to 15566 states and 21776 transitions. [2021-11-23 16:50:27,466 INFO L78 Accepts]: Start accepts. Automaton has 15566 states and 21776 transitions. Word has length 132 [2021-11-23 16:50:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:27,466 INFO L470 AbstractCegarLoop]: Abstraction has 15566 states and 21776 transitions. [2021-11-23 16:50:27,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 15566 states and 21776 transitions. [2021-11-23 16:50:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 16:50:27,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:27,470 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:27,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:27,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:27,671 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:27,671 INFO L85 PathProgramCache]: Analyzing trace with hash -883209253, now seen corresponding path program 1 times [2021-11-23 16:50:27,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:27,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277706247] [2021-11-23 16:50:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:27,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:27,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:27,675 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:27,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 16:50:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:27,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:50:27,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 16:50:28,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:28,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:28,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277706247] [2021-11-23 16:50:28,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277706247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:28,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:28,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:50:28,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905472804] [2021-11-23 16:50:28,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:28,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:50:28,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:28,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:50:28,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:28,808 INFO L87 Difference]: Start difference. First operand 15566 states and 21776 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:29,478 INFO L93 Difference]: Finished difference Result 25005 states and 35442 transitions. [2021-11-23 16:50:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:50:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 16:50:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:29,498 INFO L225 Difference]: With dead ends: 25005 [2021-11-23 16:50:29,499 INFO L226 Difference]: Without dead ends: 15566 [2021-11-23 16:50:29,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:50:29,509 INFO L933 BasicCegarLoop]: 1595 mSDtfsCounter, 2949 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2949 SdHoareTripleChecker+Valid, 3184 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:29,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2949 Valid, 3184 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-11-23 16:50:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15566 states. [2021-11-23 16:50:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15566 to 15566. [2021-11-23 16:50:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15566 states, 15564 states have (on average 1.3990619378051914) internal successors, (21775), 15565 states have internal predecessors, (21775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15566 states to 15566 states and 21775 transitions. [2021-11-23 16:50:30,196 INFO L78 Accepts]: Start accepts. Automaton has 15566 states and 21775 transitions. Word has length 132 [2021-11-23 16:50:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:30,196 INFO L470 AbstractCegarLoop]: Abstraction has 15566 states and 21775 transitions. [2021-11-23 16:50:30,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 15566 states and 21775 transitions. [2021-11-23 16:50:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 16:50:30,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:30,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:30,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:30,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:30,401 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:30,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:30,402 INFO L85 PathProgramCache]: Analyzing trace with hash 310344411, now seen corresponding path program 1 times [2021-11-23 16:50:30,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:30,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530532731] [2021-11-23 16:50:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:30,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:30,405 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:30,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 16:50:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:30,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:50:30,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 16:50:31,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:31,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530532731] [2021-11-23 16:50:31,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530532731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:31,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:31,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:50:31,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591001625] [2021-11-23 16:50:31,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:31,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:50:31,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:50:31,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:31,585 INFO L87 Difference]: Start difference. First operand 15566 states and 21775 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:32,207 INFO L93 Difference]: Finished difference Result 25009 states and 35446 transitions. [2021-11-23 16:50:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:50:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 16:50:32,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:32,223 INFO L225 Difference]: With dead ends: 25009 [2021-11-23 16:50:32,223 INFO L226 Difference]: Without dead ends: 15566 [2021-11-23 16:50:32,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:50:32,230 INFO L933 BasicCegarLoop]: 1598 mSDtfsCounter, 2949 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2949 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:32,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2949 Valid, 3249 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-11-23 16:50:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15566 states. [2021-11-23 16:50:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15566 to 15566. [2021-11-23 16:50:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15566 states, 15564 states have (on average 1.3989976869699305) internal successors, (21774), 15565 states have internal predecessors, (21774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15566 states to 15566 states and 21774 transitions. [2021-11-23 16:50:32,696 INFO L78 Accepts]: Start accepts. Automaton has 15566 states and 21774 transitions. Word has length 132 [2021-11-23 16:50:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:32,697 INFO L470 AbstractCegarLoop]: Abstraction has 15566 states and 21774 transitions. [2021-11-23 16:50:32,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15566 states and 21774 transitions. [2021-11-23 16:50:32,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 16:50:32,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:32,700 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:32,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:32,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:32,913 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:32,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1108071973, now seen corresponding path program 1 times [2021-11-23 16:50:32,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:32,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121557266] [2021-11-23 16:50:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:32,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:32,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:32,915 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:32,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 16:50:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:33,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:50:33,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 16:50:33,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:33,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121557266] [2021-11-23 16:50:33,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121557266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:33,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:33,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:50:33,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978302458] [2021-11-23 16:50:33,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:33,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:50:33,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:33,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:50:33,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:33,855 INFO L87 Difference]: Start difference. First operand 15566 states and 21774 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:34,421 INFO L93 Difference]: Finished difference Result 24976 states and 35407 transitions. [2021-11-23 16:50:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:50:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 16:50:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:34,438 INFO L225 Difference]: With dead ends: 24976 [2021-11-23 16:50:34,439 INFO L226 Difference]: Without dead ends: 15529 [2021-11-23 16:50:34,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:50:34,449 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 1492 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 4750 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:34,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 4750 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-11-23 16:50:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15529 states. [2021-11-23 16:50:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15529 to 15529. [2021-11-23 16:50:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15529 states, 15527 states have (on average 1.3994976492561344) internal successors, (21730), 15528 states have internal predecessors, (21730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15529 states to 15529 states and 21730 transitions. [2021-11-23 16:50:34,923 INFO L78 Accepts]: Start accepts. Automaton has 15529 states and 21730 transitions. Word has length 132 [2021-11-23 16:50:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:34,924 INFO L470 AbstractCegarLoop]: Abstraction has 15529 states and 21730 transitions. [2021-11-23 16:50:34,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 15529 states and 21730 transitions. [2021-11-23 16:50:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 16:50:34,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:34,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:34,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:35,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:35,128 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1317852128, now seen corresponding path program 1 times [2021-11-23 16:50:35,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:35,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911605762] [2021-11-23 16:50:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:35,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:35,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:35,130 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:35,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 16:50:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:35,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:35,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:35,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:35,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:35,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911605762] [2021-11-23 16:50:35,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911605762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:35,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:35,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:50:35,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447658017] [2021-11-23 16:50:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:35,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:35,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:35,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:35,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:35,768 INFO L87 Difference]: Start difference. First operand 15529 states and 21730 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:17,153 INFO L93 Difference]: Finished difference Result 26796 states and 36828 transitions. [2021-11-23 16:51:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:51:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-23 16:51:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:17,178 INFO L225 Difference]: With dead ends: 26796 [2021-11-23 16:51:17,178 INFO L226 Difference]: Without dead ends: 20786 [2021-11-23 16:51:17,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 16:51:17,186 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 816 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:17,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 829 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 40.8s Time] [2021-11-23 16:51:17,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20786 states. [2021-11-23 16:51:17,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20786 to 20035. [2021-11-23 16:51:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20035 states, 20033 states have (on average 1.327908950232117) internal successors, (26602), 20034 states have internal predecessors, (26602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20035 states to 20035 states and 26602 transitions. [2021-11-23 16:51:17,772 INFO L78 Accepts]: Start accepts. Automaton has 20035 states and 26602 transitions. Word has length 133 [2021-11-23 16:51:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:17,773 INFO L470 AbstractCegarLoop]: Abstraction has 20035 states and 26602 transitions. [2021-11-23 16:51:17,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20035 states and 26602 transitions. [2021-11-23 16:51:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 16:51:17,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:17,776 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:51:17,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:17,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:17,977 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash -992792554, now seen corresponding path program 1 times [2021-11-23 16:51:17,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:17,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874991573] [2021-11-23 16:51:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:17,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:17,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:17,979 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:17,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 16:51:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:18,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:18,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:20,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:21,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:21,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874991573] [2021-11-23 16:51:21,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874991573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:21,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1373513915] [2021-11-23 16:51:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:21,352 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:21,354 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:21,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-23 16:51:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:21,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:21,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:24,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:24,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1373513915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:24,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417799138] [2021-11-23 16:51:24,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:24,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:24,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:24,921 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:24,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 16:51:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:25,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:27,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:27,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417799138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:27,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:27,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:51:27,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698970638] [2021-11-23 16:51:27,890 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:27,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:51:27,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:27,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:51:27,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:51:27,892 INFO L87 Difference]: Start difference. First operand 20035 states and 26602 transitions. Second operand has 16 states, 16 states have (on average 15.1875) internal successors, (243), 15 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 16:51:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:28,682 INFO L93 Difference]: Finished difference Result 29459 states and 40259 transitions. [2021-11-23 16:51:28,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:51:28,682 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.1875) internal successors, (243), 15 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 133 [2021-11-23 16:51:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:28,705 INFO L225 Difference]: With dead ends: 29459 [2021-11-23 16:51:28,705 INFO L226 Difference]: Without dead ends: 20049 [2021-11-23 16:51:28,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 16:51:28,714 INFO L933 BasicCegarLoop]: 1581 mSDtfsCounter, 5940 mSDsluCounter, 11048 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5940 SdHoareTripleChecker+Valid, 12629 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:28,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5940 Valid, 12629 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 136 Unchecked, 0.2s Time] [2021-11-23 16:51:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20049 states. [2021-11-23 16:51:29,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20049 to 20047. [2021-11-23 16:51:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20047 states, 20045 states have (on average 1.3280119730606137) internal successors, (26620), 20046 states have internal predecessors, (26620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20047 states to 20047 states and 26620 transitions. [2021-11-23 16:51:29,241 INFO L78 Accepts]: Start accepts. Automaton has 20047 states and 26620 transitions. Word has length 133 [2021-11-23 16:51:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:29,241 INFO L470 AbstractCegarLoop]: Abstraction has 20047 states and 26620 transitions. [2021-11-23 16:51:29,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.1875) internal successors, (243), 15 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 16:51:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 20047 states and 26620 transitions. [2021-11-23 16:51:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 16:51:29,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:29,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:29,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:29,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:29,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:29,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:29,845 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1738375284, now seen corresponding path program 1 times [2021-11-23 16:51:29,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:29,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904304576] [2021-11-23 16:51:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:29,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:29,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:29,847 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:29,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 16:51:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:51:29,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:30,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:30,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:30,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904304576] [2021-11-23 16:51:30,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904304576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:30,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:30,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:51:30,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110085669] [2021-11-23 16:51:30,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:30,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:51:30,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:30,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:51:30,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:51:30,223 INFO L87 Difference]: Start difference. First operand 20047 states and 26620 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:30,509 INFO L93 Difference]: Finished difference Result 24755 states and 33438 transitions. [2021-11-23 16:51:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:51:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-23 16:51:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:30,526 INFO L225 Difference]: With dead ends: 24755 [2021-11-23 16:51:30,526 INFO L226 Difference]: Without dead ends: 15345 [2021-11-23 16:51:30,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 16:51:30,534 INFO L933 BasicCegarLoop]: 1652 mSDtfsCounter, 59 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 3226 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:30,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 3226 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:51:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15345 states. [2021-11-23 16:51:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15345 to 15343. [2021-11-23 16:51:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15343 states, 15341 states have (on average 1.2876605175673033) internal successors, (19754), 15342 states have internal predecessors, (19754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15343 states to 15343 states and 19754 transitions. [2021-11-23 16:51:30,886 INFO L78 Accepts]: Start accepts. Automaton has 15343 states and 19754 transitions. Word has length 133 [2021-11-23 16:51:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:30,887 INFO L470 AbstractCegarLoop]: Abstraction has 15343 states and 19754 transitions. [2021-11-23 16:51:30,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 15343 states and 19754 transitions. [2021-11-23 16:51:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 16:51:30,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:30,889 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:51:30,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:31,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:31,090 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash 456659376, now seen corresponding path program 1 times [2021-11-23 16:51:31,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:31,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764298793] [2021-11-23 16:51:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:31,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:31,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:31,092 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:31,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 16:51:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:31,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:33,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:34,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:34,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764298793] [2021-11-23 16:51:34,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764298793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:34,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [633889528] [2021-11-23 16:51:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:34,692 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:34,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:34,694 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:34,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-23 16:51:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:34,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:34,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:37,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:38,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [633889528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:38,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134094320] [2021-11-23 16:51:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:38,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:38,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:38,429 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:38,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 16:51:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:38,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:41,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:42,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134094320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:42,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:42,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:51:42,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531038288] [2021-11-23 16:51:42,557 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:42,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:51:42,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:42,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:51:42,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:51:42,560 INFO L87 Difference]: Start difference. First operand 15343 states and 19754 transitions. Second operand has 16 states, 16 states have (on average 15.5625) internal successors, (249), 15 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:43,061 INFO L93 Difference]: Finished difference Result 20063 states and 26547 transitions. [2021-11-23 16:51:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:51:43,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.5625) internal successors, (249), 15 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-23 16:51:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:43,088 INFO L225 Difference]: With dead ends: 20063 [2021-11-23 16:51:43,088 INFO L226 Difference]: Without dead ends: 15357 [2021-11-23 16:51:43,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 785 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:51:43,095 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 3026 mSDsluCounter, 14028 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3026 SdHoareTripleChecker+Valid, 15607 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:43,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3026 Valid, 15607 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2021-11-23 16:51:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15357 states. [2021-11-23 16:51:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15357 to 15355. [2021-11-23 16:51:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15355 states, 15353 states have (on average 1.2878264834234352) internal successors, (19772), 15354 states have internal predecessors, (19772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15355 states to 15355 states and 19772 transitions. [2021-11-23 16:51:43,438 INFO L78 Accepts]: Start accepts. Automaton has 15355 states and 19772 transitions. Word has length 134 [2021-11-23 16:51:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:43,438 INFO L470 AbstractCegarLoop]: Abstraction has 15355 states and 19772 transitions. [2021-11-23 16:51:43,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.5625) internal successors, (249), 15 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 15355 states and 19772 transitions. [2021-11-23 16:51:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 16:51:43,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:43,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:43,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:43,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:43,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:44,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:44,042 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:44,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1483371482, now seen corresponding path program 1 times [2021-11-23 16:51:44,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:44,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854939065] [2021-11-23 16:51:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:44,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:44,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:44,058 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:44,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 16:51:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:51:44,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:44,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:44,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:44,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854939065] [2021-11-23 16:51:44,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854939065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:44,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:44,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:51:44,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220553065] [2021-11-23 16:51:44,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:44,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:51:44,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:51:44,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:51:44,434 INFO L87 Difference]: Start difference. First operand 15355 states and 19772 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:44,695 INFO L93 Difference]: Finished difference Result 17711 states and 23158 transitions. [2021-11-23 16:51:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:51:44,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-23 16:51:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:44,710 INFO L225 Difference]: With dead ends: 17711 [2021-11-23 16:51:44,710 INFO L226 Difference]: Without dead ends: 13005 [2021-11-23 16:51:44,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 132 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 16:51:44,715 INFO L933 BasicCegarLoop]: 1644 mSDtfsCounter, 54 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:44,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3210 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:51:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13005 states. [2021-11-23 16:51:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13005 to 13003. [2021-11-23 16:51:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13003 states, 13001 states have (on average 1.2585185754941928) internal successors, (16362), 13002 states have internal predecessors, (16362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13003 states to 13003 states and 16362 transitions. [2021-11-23 16:51:44,960 INFO L78 Accepts]: Start accepts. Automaton has 13003 states and 16362 transitions. Word has length 134 [2021-11-23 16:51:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:44,960 INFO L470 AbstractCegarLoop]: Abstraction has 13003 states and 16362 transitions. [2021-11-23 16:51:44,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 13003 states and 16362 transitions. [2021-11-23 16:51:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 16:51:44,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:44,962 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:51:44,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:45,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:45,165 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1144407309, now seen corresponding path program 1 times [2021-11-23 16:51:45,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:45,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203949297] [2021-11-23 16:51:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:45,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:45,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:45,167 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:45,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 16:51:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:45,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:45,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:47,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:48,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:48,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203949297] [2021-11-23 16:51:48,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203949297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:48,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1139778023] [2021-11-23 16:51:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:48,804 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:48,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:48,805 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:48,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-23 16:51:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:48,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:51,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:52,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1139778023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:52,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002593403] [2021-11-23 16:51:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:52,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:52,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:52,626 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:52,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 16:51:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:52,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:52,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:55,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:56,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002593403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:56,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:56,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:51:56,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705200105] [2021-11-23 16:51:56,793 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:56,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:51:56,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:56,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:51:56,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:51:56,795 INFO L87 Difference]: Start difference. First operand 13003 states and 16362 transitions. Second operand has 16 states, 16 states have (on average 15.9375) internal successors, (255), 15 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:57,241 INFO L93 Difference]: Finished difference Result 15371 states and 19747 transitions. [2021-11-23 16:51:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:51:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.9375) internal successors, (255), 15 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-23 16:51:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:57,256 INFO L225 Difference]: With dead ends: 15371 [2021-11-23 16:51:57,256 INFO L226 Difference]: Without dead ends: 13017 [2021-11-23 16:51:57,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 790 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 16:51:57,260 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 4444 mSDsluCounter, 12743 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4444 SdHoareTripleChecker+Valid, 14320 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:57,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4444 Valid, 14320 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2021-11-23 16:51:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13017 states. [2021-11-23 16:51:57,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13017 to 13015. [2021-11-23 16:51:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13015 states, 13013 states have (on average 1.2587412587412588) internal successors, (16380), 13014 states have internal predecessors, (16380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13015 states to 13015 states and 16380 transitions. [2021-11-23 16:51:57,510 INFO L78 Accepts]: Start accepts. Automaton has 13015 states and 16380 transitions. Word has length 135 [2021-11-23 16:51:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:57,510 INFO L470 AbstractCegarLoop]: Abstraction has 13015 states and 16380 transitions. [2021-11-23 16:51:57,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.9375) internal successors, (255), 15 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 13015 states and 16380 transitions. [2021-11-23 16:51:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 16:51:57,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:57,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:57,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:57,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:57,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-23 16:51:58,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:58,114 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:58,115 INFO L85 PathProgramCache]: Analyzing trace with hash -449877373, now seen corresponding path program 1 times [2021-11-23 16:51:58,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:58,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538912031] [2021-11-23 16:51:58,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:58,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:58,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:58,116 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:58,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 16:51:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:58,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:51:58,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:51:58,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:58,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:58,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538912031] [2021-11-23 16:51:58,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538912031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:58,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:58,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:51:58,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406094249] [2021-11-23 16:51:58,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:58,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:51:58,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:58,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:51:58,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:51:58,489 INFO L87 Difference]: Start difference. First operand 13015 states and 16380 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:58,614 INFO L93 Difference]: Finished difference Result 14195 states and 18062 transitions. [2021-11-23 16:51:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:51:58,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-23 16:51:58,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:58,625 INFO L225 Difference]: With dead ends: 14195 [2021-11-23 16:51:58,626 INFO L226 Difference]: Without dead ends: 11841 [2021-11-23 16:51:58,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 16:51:58,630 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 49 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3194 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:58,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 3194 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:51:58,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11841 states. [2021-11-23 16:51:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11841 to 11839. [2021-11-23 16:51:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11839 states, 11837 states have (on average 1.2406859846244827) internal successors, (14686), 11838 states have internal predecessors, (14686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11839 states to 11839 states and 14686 transitions. [2021-11-23 16:51:58,814 INFO L78 Accepts]: Start accepts. Automaton has 11839 states and 14686 transitions. Word has length 135 [2021-11-23 16:51:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:58,815 INFO L470 AbstractCegarLoop]: Abstraction has 11839 states and 14686 transitions. [2021-11-23 16:51:58,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 11839 states and 14686 transitions. [2021-11-23 16:51:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 16:51:58,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:58,816 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:51:58,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:59,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:59,017 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:59,018 INFO L85 PathProgramCache]: Analyzing trace with hash 99668615, now seen corresponding path program 1 times [2021-11-23 16:51:59,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:59,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234745341] [2021-11-23 16:51:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:59,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:59,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:59,020 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:59,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 16:51:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:51:59,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:02,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:03,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:03,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234745341] [2021-11-23 16:52:03,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234745341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:03,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [728889222] [2021-11-23 16:52:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:03,384 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:03,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:03,385 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:03,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-23 16:52:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:06,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:08,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [728889222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815939097] [2021-11-23 16:52:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:08,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:08,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:08,143 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:08,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 16:52:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:08,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:11,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:13,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815939097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:13,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:13,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:52:13,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374232800] [2021-11-23 16:52:13,302 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:13,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:52:13,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:13,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:52:13,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:52:13,304 INFO L87 Difference]: Start difference. First operand 11839 states and 14686 transitions. Second operand has 16 states, 16 states have (on average 16.3125) internal successors, (261), 15 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 16:52:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:13,630 INFO L93 Difference]: Finished difference Result 13031 states and 16379 transitions. [2021-11-23 16:52:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:52:13,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.3125) internal successors, (261), 15 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 136 [2021-11-23 16:52:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:13,642 INFO L225 Difference]: With dead ends: 13031 [2021-11-23 16:52:13,642 INFO L226 Difference]: Without dead ends: 11853 [2021-11-23 16:52:13,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 796 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:52:13,646 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 1563 mSDsluCounter, 15501 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1563 SdHoareTripleChecker+Valid, 17076 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:13,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1563 Valid, 17076 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2021-11-23 16:52:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11853 states. [2021-11-23 16:52:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11853 to 11851. [2021-11-23 16:52:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11851 states, 11849 states have (on average 1.2409486032576589) internal successors, (14704), 11850 states have internal predecessors, (14704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11851 states to 11851 states and 14704 transitions. [2021-11-23 16:52:13,836 INFO L78 Accepts]: Start accepts. Automaton has 11851 states and 14704 transitions. Word has length 136 [2021-11-23 16:52:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:13,837 INFO L470 AbstractCegarLoop]: Abstraction has 11851 states and 14704 transitions. [2021-11-23 16:52:13,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.3125) internal successors, (261), 15 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 16:52:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 11851 states and 14704 transitions. [2021-11-23 16:52:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 16:52:13,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:13,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:13,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:14,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-23 16:52:14,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:14,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:14,440 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:14,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash 437461757, now seen corresponding path program 1 times [2021-11-23 16:52:14,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:14,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080675099] [2021-11-23 16:52:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:14,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:14,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:14,442 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:14,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 16:52:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:14,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:14,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:14,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:14,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080675099] [2021-11-23 16:52:14,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080675099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:14,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:14,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:14,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054522425] [2021-11-23 16:52:14,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:14,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:14,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:14,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:14,834 INFO L87 Difference]: Start difference. First operand 11851 states and 14704 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:14,941 INFO L93 Difference]: Finished difference Result 12443 states and 15540 transitions. [2021-11-23 16:52:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:14,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-23 16:52:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:14,951 INFO L225 Difference]: With dead ends: 12443 [2021-11-23 16:52:14,952 INFO L226 Difference]: Without dead ends: 11265 [2021-11-23 16:52:14,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 134 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 16:52:14,955 INFO L933 BasicCegarLoop]: 1628 mSDtfsCounter, 44 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:14,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3178 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2021-11-23 16:52:15,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 11263. [2021-11-23 16:52:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11263 states, 11261 states have (on average 1.2309741586004794) internal successors, (13862), 11262 states have internal predecessors, (13862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11263 states to 11263 states and 13862 transitions. [2021-11-23 16:52:15,113 INFO L78 Accepts]: Start accepts. Automaton has 11263 states and 13862 transitions. Word has length 136 [2021-11-23 16:52:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:15,113 INFO L470 AbstractCegarLoop]: Abstraction has 11263 states and 13862 transitions. [2021-11-23 16:52:15,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11263 states and 13862 transitions. [2021-11-23 16:52:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-23 16:52:15,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:15,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:52:15,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:15,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:15,315 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:15,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:15,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1768652036, now seen corresponding path program 1 times [2021-11-23 16:52:15,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:15,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224210212] [2021-11-23 16:52:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:15,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:15,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:15,317 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:15,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 16:52:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:15,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:15,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:18,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:19,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:19,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224210212] [2021-11-23 16:52:19,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224210212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:19,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1457900375] [2021-11-23 16:52:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:19,596 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:19,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:19,596 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:19,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-23 16:52:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:19,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:22,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:23,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1457900375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:23,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803555409] [2021-11-23 16:52:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:23,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:23,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:23,674 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:23,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-23 16:52:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:23,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:26,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:28,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803555409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:28,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:28,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:52:28,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24119519] [2021-11-23 16:52:28,342 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:28,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:52:28,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:52:28,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:52:28,343 INFO L87 Difference]: Start difference. First operand 11263 states and 13862 transitions. Second operand has 16 states, 16 states have (on average 16.6875) internal successors, (267), 15 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 16:52:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:28,649 INFO L93 Difference]: Finished difference Result 11867 states and 14715 transitions. [2021-11-23 16:52:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:52:28,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.6875) internal successors, (267), 15 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 137 [2021-11-23 16:52:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:28,660 INFO L225 Difference]: With dead ends: 11867 [2021-11-23 16:52:28,660 INFO L226 Difference]: Without dead ends: 11277 [2021-11-23 16:52:28,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 802 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:52:28,663 INFO L933 BasicCegarLoop]: 1573 mSDtfsCounter, 3108 mSDsluCounter, 12662 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3108 SdHoareTripleChecker+Valid, 14235 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:28,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3108 Valid, 14235 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2021-11-23 16:52:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11277 states. [2021-11-23 16:52:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11277 to 11275. [2021-11-23 16:52:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11275 states, 11273 states have (on average 1.2312605340193383) internal successors, (13880), 11274 states have internal predecessors, (13880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11275 states to 11275 states and 13880 transitions. [2021-11-23 16:52:28,826 INFO L78 Accepts]: Start accepts. Automaton has 11275 states and 13880 transitions. Word has length 137 [2021-11-23 16:52:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:28,827 INFO L470 AbstractCegarLoop]: Abstraction has 11275 states and 13880 transitions. [2021-11-23 16:52:28,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.6875) internal successors, (267), 15 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 16:52:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 11275 states and 13880 transitions. [2021-11-23 16:52:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-23 16:52:28,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:28,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:28,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:29,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:29,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:29,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:29,430 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:29,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:29,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1308329862, now seen corresponding path program 1 times [2021-11-23 16:52:29,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:29,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356850082] [2021-11-23 16:52:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:29,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:29,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:29,432 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:29,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 16:52:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:29,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:29,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:29,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:29,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356850082] [2021-11-23 16:52:29,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356850082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:29,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:29,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:29,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488643904] [2021-11-23 16:52:29,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:29,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:29,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:29,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:29,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:29,818 INFO L87 Difference]: Start difference. First operand 11275 states and 13880 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:29,901 INFO L93 Difference]: Finished difference Result 11573 states and 14296 transitions. [2021-11-23 16:52:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-23 16:52:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:29,911 INFO L225 Difference]: With dead ends: 11573 [2021-11-23 16:52:29,911 INFO L226 Difference]: Without dead ends: 10983 [2021-11-23 16:52:29,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 16:52:29,915 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 39 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:29,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 3162 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:52:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10983 states. [2021-11-23 16:52:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10983 to 10981. [2021-11-23 16:52:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10981 states, 10979 states have (on average 1.2260679479005374) internal successors, (13461), 10980 states have internal predecessors, (13461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10981 states to 10981 states and 13461 transitions. [2021-11-23 16:52:30,078 INFO L78 Accepts]: Start accepts. Automaton has 10981 states and 13461 transitions. Word has length 137 [2021-11-23 16:52:30,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:30,078 INFO L470 AbstractCegarLoop]: Abstraction has 10981 states and 13461 transitions. [2021-11-23 16:52:30,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 10981 states and 13461 transitions. [2021-11-23 16:52:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 16:52:30,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:30,081 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:52:30,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:30,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:30,295 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1505795678, now seen corresponding path program 1 times [2021-11-23 16:52:30,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:30,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238705498] [2021-11-23 16:52:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:30,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:30,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:30,296 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:30,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 16:52:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:30,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:30,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 16:52:34,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:34,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:34,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238705498] [2021-11-23 16:52:34,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238705498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:34,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:34,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:52:34,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920647887] [2021-11-23 16:52:34,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:34,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:52:34,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:52:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:52:34,036 INFO L87 Difference]: Start difference. First operand 10981 states and 13461 transitions. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:34,529 INFO L93 Difference]: Finished difference Result 11861 states and 14675 transitions. [2021-11-23 16:52:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:52:34,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-23 16:52:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:34,545 INFO L225 Difference]: With dead ends: 11861 [2021-11-23 16:52:34,545 INFO L226 Difference]: Without dead ends: 11565 [2021-11-23 16:52:34,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:52:34,550 INFO L933 BasicCegarLoop]: 1722 mSDtfsCounter, 5937 mSDsluCounter, 2223 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5937 SdHoareTripleChecker+Valid, 3945 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:34,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5937 Valid, 3945 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:52:34,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11565 states. [2021-11-23 16:52:34,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11565 to 10981. [2021-11-23 16:52:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10981 states, 10979 states have (on average 1.2255214500409874) internal successors, (13455), 10980 states have internal predecessors, (13455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10981 states to 10981 states and 13455 transitions. [2021-11-23 16:52:34,726 INFO L78 Accepts]: Start accepts. Automaton has 10981 states and 13455 transitions. Word has length 138 [2021-11-23 16:52:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:34,726 INFO L470 AbstractCegarLoop]: Abstraction has 10981 states and 13455 transitions. [2021-11-23 16:52:34,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 10981 states and 13455 transitions. [2021-11-23 16:52:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 16:52:34,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:34,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:52:34,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:34,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:34,928 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1286812511, now seen corresponding path program 1 times [2021-11-23 16:52:34,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:34,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861065687] [2021-11-23 16:52:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:34,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:34,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:34,930 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:34,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-23 16:52:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:35,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 16:52:39,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:39,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:39,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861065687] [2021-11-23 16:52:39,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861065687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:39,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:39,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:52:39,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382726972] [2021-11-23 16:52:39,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:39,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:52:39,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:39,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:52:39,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:52:39,491 INFO L87 Difference]: Start difference. First operand 10981 states and 13455 transitions. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:39,952 INFO L93 Difference]: Finished difference Result 11763 states and 14536 transitions. [2021-11-23 16:52:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:52:39,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-23 16:52:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:39,967 INFO L225 Difference]: With dead ends: 11763 [2021-11-23 16:52:39,967 INFO L226 Difference]: Without dead ends: 11663 [2021-11-23 16:52:39,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:52:39,971 INFO L933 BasicCegarLoop]: 1732 mSDtfsCounter, 5372 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5372 SdHoareTripleChecker+Valid, 3964 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:39,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5372 Valid, 3964 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:52:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11663 states. [2021-11-23 16:52:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11663 to 11083. [2021-11-23 16:52:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11083 states, 11081 states have (on average 1.2266040971031495) internal successors, (13592), 11082 states have internal predecessors, (13592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11083 states to 11083 states and 13592 transitions. [2021-11-23 16:52:40,133 INFO L78 Accepts]: Start accepts. Automaton has 11083 states and 13592 transitions. Word has length 138 [2021-11-23 16:52:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:40,133 INFO L470 AbstractCegarLoop]: Abstraction has 11083 states and 13592 transitions. [2021-11-23 16:52:40,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 11083 states and 13592 transitions. [2021-11-23 16:52:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 16:52:40,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:40,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:52:40,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:40,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:40,336 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1652691006, now seen corresponding path program 1 times [2021-11-23 16:52:40,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:40,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277510258] [2021-11-23 16:52:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:40,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:40,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:40,340 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:40,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 16:52:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:40,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:40,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 16:52:45,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:45,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:45,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277510258] [2021-11-23 16:52:45,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277510258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:45,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:45,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:52:45,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021671515] [2021-11-23 16:52:45,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:45,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:52:45,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:45,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:52:45,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:52:45,632 INFO L87 Difference]: Start difference. First operand 11083 states and 13592 transitions. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:46,153 INFO L93 Difference]: Finished difference Result 11865 states and 14673 transitions. [2021-11-23 16:52:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:52:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-23 16:52:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:46,170 INFO L225 Difference]: With dead ends: 11865 [2021-11-23 16:52:46,170 INFO L226 Difference]: Without dead ends: 11765 [2021-11-23 16:52:46,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:52:46,174 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 4112 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4112 SdHoareTripleChecker+Valid, 4094 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:46,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4112 Valid, 4094 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:52:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11765 states. [2021-11-23 16:52:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11765 to 11191. [2021-11-23 16:52:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11191 states, 11189 states have (on average 1.2277236571632855) internal successors, (13737), 11190 states have internal predecessors, (13737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11191 states to 11191 states and 13737 transitions. [2021-11-23 16:52:46,345 INFO L78 Accepts]: Start accepts. Automaton has 11191 states and 13737 transitions. Word has length 138 [2021-11-23 16:52:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:46,345 INFO L470 AbstractCegarLoop]: Abstraction has 11191 states and 13737 transitions. [2021-11-23 16:52:46,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 11191 states and 13737 transitions. [2021-11-23 16:52:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 16:52:46,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:46,346 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:52:46,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:46,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:46,547 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1292338881, now seen corresponding path program 1 times [2021-11-23 16:52:46,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:46,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864256967] [2021-11-23 16:52:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:46,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:46,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:46,551 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:46,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-23 16:52:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:46,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:46,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:52:52,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:52,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:52,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864256967] [2021-11-23 16:52:52,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864256967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:52,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:52,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:52:52,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689177971] [2021-11-23 16:52:52,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:52,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:52:52,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:52,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:52:52,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:52:52,721 INFO L87 Difference]: Start difference. First operand 11191 states and 13737 transitions. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:53,194 INFO L93 Difference]: Finished difference Result 11973 states and 14818 transitions. [2021-11-23 16:52:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:52:53,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-23 16:52:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:53,205 INFO L225 Difference]: With dead ends: 11973 [2021-11-23 16:52:53,205 INFO L226 Difference]: Without dead ends: 11873 [2021-11-23 16:52:53,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:52:53,208 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 8604 mSDsluCounter, 2302 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8604 SdHoareTripleChecker+Valid, 4044 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:53,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8604 Valid, 4044 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:52:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11873 states. [2021-11-23 16:52:53,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11873 to 11305. [2021-11-23 16:52:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11305 states, 11303 states have (on average 1.2288772892152526) internal successors, (13890), 11304 states have internal predecessors, (13890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11305 states to 11305 states and 13890 transitions. [2021-11-23 16:52:53,379 INFO L78 Accepts]: Start accepts. Automaton has 11305 states and 13890 transitions. Word has length 138 [2021-11-23 16:52:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:53,379 INFO L470 AbstractCegarLoop]: Abstraction has 11305 states and 13890 transitions. [2021-11-23 16:52:53,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 11305 states and 13890 transitions. [2021-11-23 16:52:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 16:52:53,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:53,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:52:53,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:53,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:53,581 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:53,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:53,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1762044446, now seen corresponding path program 1 times [2021-11-23 16:52:53,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:53,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984335707] [2021-11-23 16:52:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:53,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:53,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:53,584 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:53,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-23 16:52:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:53,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:52:53,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:53:00,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:00,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:00,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984335707] [2021-11-23 16:53:00,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984335707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:00,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:00,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:53:00,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210519121] [2021-11-23 16:53:00,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:00,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:53:00,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:53:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:53:00,099 INFO L87 Difference]: Start difference. First operand 11305 states and 13890 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:00,598 INFO L93 Difference]: Finished difference Result 12087 states and 14971 transitions. [2021-11-23 16:53:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:53:00,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-23 16:53:00,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:00,609 INFO L225 Difference]: With dead ends: 12087 [2021-11-23 16:53:00,609 INFO L226 Difference]: Without dead ends: 11987 [2021-11-23 16:53:00,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:53:00,613 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 4248 mSDsluCounter, 2403 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4248 SdHoareTripleChecker+Valid, 4145 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:00,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4248 Valid, 4145 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:53:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11987 states. [2021-11-23 16:53:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11987 to 11425. [2021-11-23 16:53:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11425 states, 11423 states have (on average 1.2300621553007092) internal successors, (14051), 11424 states have internal predecessors, (14051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11425 states to 11425 states and 14051 transitions. [2021-11-23 16:53:00,805 INFO L78 Accepts]: Start accepts. Automaton has 11425 states and 14051 transitions. Word has length 138 [2021-11-23 16:53:00,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:00,805 INFO L470 AbstractCegarLoop]: Abstraction has 11425 states and 14051 transitions. [2021-11-23 16:53:00,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 11425 states and 14051 transitions. [2021-11-23 16:53:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 16:53:00,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:00,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:53:00,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:01,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:01,007 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:01,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:01,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1287133409, now seen corresponding path program 1 times [2021-11-23 16:53:01,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:01,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996829760] [2021-11-23 16:53:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:01,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:01,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:01,010 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:01,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 16:53:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:01,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:01,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:53:04,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:04,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:04,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996829760] [2021-11-23 16:53:04,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996829760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:04,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:04,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:53:04,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652951269] [2021-11-23 16:53:04,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:04,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:53:04,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:53:04,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:53:04,796 INFO L87 Difference]: Start difference. First operand 11425 states and 14051 transitions. Second operand has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:05,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:05,286 INFO L93 Difference]: Finished difference Result 12207 states and 15132 transitions. [2021-11-23 16:53:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:53:05,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-23 16:53:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:05,297 INFO L225 Difference]: With dead ends: 12207 [2021-11-23 16:53:05,297 INFO L226 Difference]: Without dead ends: 12107 [2021-11-23 16:53:05,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:53:05,300 INFO L933 BasicCegarLoop]: 1743 mSDtfsCounter, 3884 mSDsluCounter, 2505 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3884 SdHoareTripleChecker+Valid, 4248 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:05,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3884 Valid, 4248 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:53:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12107 states. [2021-11-23 16:53:05,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12107 to 11551. [2021-11-23 16:53:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11551 states, 11549 states have (on average 1.2312754351026063) internal successors, (14220), 11550 states have internal predecessors, (14220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11551 states to 11551 states and 14220 transitions. [2021-11-23 16:53:05,490 INFO L78 Accepts]: Start accepts. Automaton has 11551 states and 14220 transitions. Word has length 138 [2021-11-23 16:53:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:05,491 INFO L470 AbstractCegarLoop]: Abstraction has 11551 states and 14220 transitions. [2021-11-23 16:53:05,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 11551 states and 14220 transitions. [2021-11-23 16:53:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 16:53:05,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:05,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:53:05,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:05,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:05,693 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:05,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:05,693 INFO L85 PathProgramCache]: Analyzing trace with hash 293366782, now seen corresponding path program 1 times [2021-11-23 16:53:05,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:05,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891025935] [2021-11-23 16:53:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:05,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:05,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:05,695 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:05,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-23 16:53:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:53:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:53:10,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:10,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:10,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891025935] [2021-11-23 16:53:10,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891025935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:10,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:53:10,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:53:10,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603568739] [2021-11-23 16:53:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:10,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:53:10,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:53:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:53:10,349 INFO L87 Difference]: Start difference. First operand 11551 states and 14220 transitions. Second operand has 9 states, 9 states have (on average 15.222222222222221) internal successors, (137), 9 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:10,802 INFO L93 Difference]: Finished difference Result 12333 states and 15301 transitions. [2021-11-23 16:53:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:53:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.222222222222221) internal successors, (137), 9 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-23 16:53:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:10,815 INFO L225 Difference]: With dead ends: 12333 [2021-11-23 16:53:10,815 INFO L226 Difference]: Without dead ends: 12233 [2021-11-23 16:53:10,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:53:10,818 INFO L933 BasicCegarLoop]: 1725 mSDtfsCounter, 4296 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4296 SdHoareTripleChecker+Valid, 3962 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:10,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4296 Valid, 3962 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:53:10,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12233 states. [2021-11-23 16:53:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12233 to 11677. [2021-11-23 16:53:11,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11677 states, 11675 states have (on average 1.2324625267665952) internal successors, (14389), 11676 states have internal predecessors, (14389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11677 states to 11677 states and 14389 transitions. [2021-11-23 16:53:11,030 INFO L78 Accepts]: Start accepts. Automaton has 11677 states and 14389 transitions. Word has length 138 [2021-11-23 16:53:11,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:11,030 INFO L470 AbstractCegarLoop]: Abstraction has 11677 states and 14389 transitions. [2021-11-23 16:53:11,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.222222222222221) internal successors, (137), 9 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:11,030 INFO L276 IsEmpty]: Start isEmpty. Operand 11677 states and 14389 transitions. [2021-11-23 16:53:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 16:53:11,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:11,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:53:11,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:11,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:11,237 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:11,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1560138254, now seen corresponding path program 1 times [2021-11-23 16:53:11,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:11,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742540852] [2021-11-23 16:53:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:11,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:11,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:11,239 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:11,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-23 16:53:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:11,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 16:53:11,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:58,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:15,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:15,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742540852] [2021-11-23 16:54:15,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742540852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:15,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [472951879] [2021-11-23 16:54:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:15,096 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:15,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:54:15,098 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:54:15,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-11-23 16:54:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:15,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 16:54:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:22,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:25,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [472951879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:25,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542755042] [2021-11-23 16:54:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:25,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:54:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:54:25,141 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:54:25,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-23 16:54:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 16:54:25,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:15,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:27,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542755042] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:27,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:56:27,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 36, 13, 13, 46, 37] total 132 [2021-11-23 16:56:27,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985642397] [2021-11-23 16:56:27,835 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:56:27,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-23 16:56:27,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-23 16:56:27,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2019, Invalid=15273, Unknown=0, NotChecked=0, Total=17292 [2021-11-23 16:56:27,844 INFO L87 Difference]: Start difference. First operand 11677 states and 14389 transitions. Second operand has 132 states, 132 states have (on average 4.4393939393939394) internal successors, (586), 132 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:13,027 INFO L93 Difference]: Finished difference Result 11911 states and 14704 transitions. [2021-11-23 16:57:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 16:57:13,028 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 4.4393939393939394) internal successors, (586), 132 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-23 16:57:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:13,038 INFO L225 Difference]: With dead ends: 11911 [2021-11-23 16:57:13,038 INFO L226 Difference]: Without dead ends: 11709 [2021-11-23 16:57:13,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 716 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 166.4s TimeCoverageRelationStatistics Valid=2841, Invalid=22599, Unknown=0, NotChecked=0, Total=25440 [2021-11-23 16:57:13,049 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 19332 mSDsluCounter, 52699 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19332 SdHoareTripleChecker+Valid, 54243 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 665 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:13,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19332 Valid, 54243 Invalid, 1617 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [24 Valid, 928 Invalid, 0 Unknown, 665 Unchecked, 2.7s Time] [2021-11-23 16:57:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-11-23 16:57:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11703. [2021-11-23 16:57:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11703 states, 11701 states have (on average 1.2323733014272285) internal successors, (14420), 11702 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11703 states to 11703 states and 14420 transitions. [2021-11-23 16:57:13,281 INFO L78 Accepts]: Start accepts. Automaton has 11703 states and 14420 transitions. Word has length 139 [2021-11-23 16:57:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:13,282 INFO L470 AbstractCegarLoop]: Abstraction has 11703 states and 14420 transitions. [2021-11-23 16:57:13,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 4.4393939393939394) internal successors, (586), 132 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:13,282 INFO L276 IsEmpty]: Start isEmpty. Operand 11703 states and 14420 transitions. [2021-11-23 16:57:13,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 16:57:13,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:13,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:57:13,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:13,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:13,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:13,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:13,884 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:57:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:13,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1804533231, now seen corresponding path program 1 times [2021-11-23 16:57:13,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:13,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600277448] [2021-11-23 16:57:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:13,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:13,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:13,889 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:13,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-23 16:57:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-23 16:57:14,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:55,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:20,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:20,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600277448] [2021-11-23 16:58:20,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600277448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:20,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1193313844] [2021-11-23 16:58:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:20,312 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:20,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:58:20,315 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:58:20,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb69e23e-0d58-460a-b127-3ed04dbb31d8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2021-11-23 16:58:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:20,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 16:58:20,557 INFO L286 TraceCheckSpWp]: Computing forward predicates...