./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/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_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/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_ed4d4a83-2a39-4f07-88f9-24ed4487809c/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 d1d937e786e719dd03193d59b7dfb2d5f8cfc5b61bd024769c3a8365c0904db0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:01:02,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:01:02,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:01:02,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:01:02,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:01:02,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:01:02,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:01:02,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:01:02,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:01:02,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:01:02,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:01:02,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:01:02,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:01:02,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:01:02,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:01:02,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:01:02,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:01:02,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:01:02,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:01:02,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:01:02,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:01:02,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:01:02,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:01:02,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:01:02,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:01:02,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:01:02,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:01:02,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:01:02,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:01:02,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:01:02,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:01:02,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:01:02,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:01:02,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:01:02,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:01:02,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:01:02,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:01:02,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:01:02,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:01:02,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:01:02,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:01:02,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:01:02,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:01:02,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:01:02,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:01:02,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:01:02,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:01:02,211 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:01:02,211 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:01:02,211 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:01:02,211 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:01:02,211 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:01:02,212 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:01:02,212 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:01:02,212 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:01:02,212 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:01:02,212 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:01:02,213 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:01:02,213 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:01:02,213 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:01:02,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:01:02,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:01:02,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:01:02,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:01:02,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:01:02,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:01:02,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:01:02,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:01:02,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:01:02,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:01:02,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:01:02,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:01:02,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:01:02,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:01:02,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:02,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:01:02,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:01:02,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:01:02,217 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:01:02,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:01:02,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:01:02,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:01:02,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:01:02,218 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_ed4d4a83-2a39-4f07-88f9-24ed4487809c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1d937e786e719dd03193d59b7dfb2d5f8cfc5b61bd024769c3a8365c0904db0 [2021-11-23 17:01:02,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:01:02,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:01:02,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:01:02,559 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:01:02,559 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:01:02,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-23 17:01:02,641 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/data/a593ed987/1167a71736594aa5ac2dc1213f2e5c6b/FLAG9ed549892 [2021-11-23 17:01:03,404 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:01:03,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-23 17:01:03,444 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/data/a593ed987/1167a71736594aa5ac2dc1213f2e5c6b/FLAG9ed549892 [2021-11-23 17:01:03,470 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/data/a593ed987/1167a71736594aa5ac2dc1213f2e5c6b [2021-11-23 17:01:03,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:01:03,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:01:03,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:03,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:01:03,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:01:03,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:03" (1/1) ... [2021-11-23 17:01:03,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d771a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:03, skipping insertion in model container [2021-11-23 17:01:03,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:03" (1/1) ... [2021-11-23 17:01:03,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:01:03,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:01:04,389 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_ed4d4a83-2a39-4f07-88f9-24ed4487809c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[40057,40070] [2021-11-23 17:01:04,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:04,809 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:01:05,282 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_ed4d4a83-2a39-4f07-88f9-24ed4487809c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[40057,40070] [2021-11-23 17:01:05,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:05,640 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:01:05,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05 WrapperNode [2021-11-23 17:01:05,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:05,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:05,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:01:05,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:01:05,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05" (1/1) ... [2021-11-23 17:01:05,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05" (1/1) ... [2021-11-23 17:01:05,819 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5295 [2021-11-23 17:01:05,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:05,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:01:05,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:01:05,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:01:05,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05" (1/1) ... [2021-11-23 17:01:05,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05" (1/1) ... [2021-11-23 17:01:05,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05" (1/1) ... [2021-11-23 17:01:05,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05" (1/1) ... [2021-11-23 17:01:05,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05" (1/1) ... [2021-11-23 17:01:05,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05" (1/1) ... [2021-11-23 17:01:05,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05" (1/1) ... [2021-11-23 17:01:06,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:01:06,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:01:06,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:01:06,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:01:06,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:05" (1/1) ... [2021-11-23 17:01:06,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:06,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:06,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:01:06,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:01:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:01:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:01:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:01:06,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:01:06,393 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:01:06,394 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:01:09,656 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:01:09,867 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 17:01:09,873 INFO L158 Benchmark]: Toolchain (without parser) took 6396.74ms. Allocated memory was 111.1MB in the beginning and 224.4MB in the end (delta: 113.2MB). Free memory was 69.3MB in the beginning and 65.3MB in the end (delta: 4.0MB). Peak memory consumption was 123.4MB. Max. memory is 16.1GB. [2021-11-23 17:01:09,874 INFO L158 Benchmark]: CDTParser took 1.12ms. Allocated memory is still 111.1MB. Free memory was 84.6MB in the beginning and 84.6MB in the end (delta: 25.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:01:09,876 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2164.05ms. Allocated memory was 111.1MB in the beginning and 142.6MB in the end (delta: 31.5MB). Free memory was 69.2MB in the beginning and 88.6MB in the end (delta: -19.4MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. [2021-11-23 17:01:09,876 INFO L158 Benchmark]: Boogie Procedure Inliner took 177.91ms. Allocated memory is still 142.6MB. Free memory was 88.6MB in the beginning and 71.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-23 17:01:09,877 INFO L158 Benchmark]: Boogie Preprocessor took 190.93ms. Allocated memory is still 142.6MB. Free memory was 71.8MB in the beginning and 92.9MB in the end (delta: -21.0MB). Peak memory consumption was 18.8MB. Max. memory is 16.1GB. [2021-11-23 17:01:09,878 INFO L158 Benchmark]: RCFGBuilder took 3857.08ms. Allocated memory was 142.6MB in the beginning and 224.4MB in the end (delta: 81.8MB). Free memory was 92.9MB in the beginning and 65.3MB in the end (delta: 27.5MB). Peak memory consumption was 115.3MB. Max. memory is 16.1GB. [2021-11-23 17:01:09,881 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.12ms. Allocated memory is still 111.1MB. Free memory was 84.6MB in the beginning and 84.6MB in the end (delta: 25.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2164.05ms. Allocated memory was 111.1MB in the beginning and 142.6MB in the end (delta: 31.5MB). Free memory was 69.2MB in the beginning and 88.6MB in the end (delta: -19.4MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 177.91ms. Allocated memory is still 142.6MB. Free memory was 88.6MB in the beginning and 71.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 190.93ms. Allocated memory is still 142.6MB. Free memory was 71.8MB in the beginning and 92.9MB in the end (delta: -21.0MB). Peak memory consumption was 18.8MB. Max. memory is 16.1GB. * RCFGBuilder took 3857.08ms. Allocated memory was 142.6MB in the beginning and 224.4MB in the end (delta: 81.8MB). Free memory was 92.9MB in the beginning and 65.3MB in the end (delta: 27.5MB). Peak memory consumption was 115.3MB. 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 17:01:09,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/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_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/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_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/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_ed4d4a83-2a39-4f07-88f9-24ed4487809c/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 d1d937e786e719dd03193d59b7dfb2d5f8cfc5b61bd024769c3a8365c0904db0 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:01:12,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:01:12,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:01:12,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:01:12,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:01:12,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:01:12,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:01:12,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:01:12,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:01:12,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:01:12,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:01:12,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:01:12,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:01:12,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:01:12,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:01:12,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:01:12,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:01:12,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:01:12,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:01:12,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:01:12,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:01:12,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:01:12,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:01:12,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:01:12,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:01:12,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:01:12,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:01:12,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:01:12,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:01:12,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:01:12,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:01:12,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:01:12,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:01:12,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:01:12,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:01:12,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:01:12,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:01:12,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:01:12,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:01:12,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:01:12,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:01:12,598 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:01:12,643 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:01:12,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:01:12,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:01:12,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:01:12,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:01:12,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:01:12,646 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:01:12,647 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:01:12,647 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:01:12,647 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:01:12,648 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:01:12,649 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:01:12,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:01:12,651 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:01:12,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:01:12,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:01:12,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:01:12,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:01:12,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:01:12,652 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:01:12,652 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:01:12,652 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:01:12,653 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:01:12,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:01:12,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:01:12,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:01:12,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:01:12,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:01:12,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:01:12,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:12,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:01:12,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:01:12,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:01:12,656 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:01:12,656 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:12,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:01:12,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:01:12,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:01:12,657 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_ed4d4a83-2a39-4f07-88f9-24ed4487809c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1d937e786e719dd03193d59b7dfb2d5f8cfc5b61bd024769c3a8365c0904db0 [2021-11-23 17:01:13,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:01:13,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:01:13,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:01:13,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:01:13,039 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:01:13,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-23 17:01:13,130 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/data/d5178edd4/532c66296cfa4b7c9bc3ecf4d59a726f/FLAG15e1fdda9 [2021-11-23 17:01:13,979 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:01:13,980 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-23 17:01:14,016 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/data/d5178edd4/532c66296cfa4b7c9bc3ecf4d59a726f/FLAG15e1fdda9 [2021-11-23 17:01:14,091 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/data/d5178edd4/532c66296cfa4b7c9bc3ecf4d59a726f [2021-11-23 17:01:14,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:01:14,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:01:14,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:14,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:01:14,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:01:14,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:14" (1/1) ... [2021-11-23 17:01:14,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aa0d155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:14, skipping insertion in model container [2021-11-23 17:01:14,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:14" (1/1) ... [2021-11-23 17:01:14,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:01:14,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:01:15,079 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[40057,40070] [2021-11-23 17:01:15,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:15,694 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:01:16,137 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_ed4d4a83-2a39-4f07-88f9-24ed4487809c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[40057,40070] [2021-11-23 17:01:16,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:16,676 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:01:16,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16 WrapperNode [2021-11-23 17:01:16,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:16,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:16,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:01:16,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:01:16,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (1/1) ... [2021-11-23 17:01:16,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (1/1) ... [2021-11-23 17:01:16,869 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5265 [2021-11-23 17:01:16,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:16,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:01:16,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:01:16,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:01:16,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (1/1) ... [2021-11-23 17:01:16,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (1/1) ... [2021-11-23 17:01:16,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (1/1) ... [2021-11-23 17:01:16,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (1/1) ... [2021-11-23 17:01:17,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (1/1) ... [2021-11-23 17:01:17,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (1/1) ... [2021-11-23 17:01:17,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (1/1) ... [2021-11-23 17:01:17,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:01:17,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:01:17,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:01:17,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:01:17,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (1/1) ... [2021-11-23 17:01:17,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:17,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:17,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:01:17,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:01:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:01:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:01:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:01:17,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:01:17,670 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:01:17,672 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:01:21,363 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:01:21,390 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:01:21,390 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 17:01:21,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:01:21 BoogieIcfgContainer [2021-11-23 17:01:21,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:01:21,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:01:21,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:01:21,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:01:21,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:01:14" (1/3) ... [2021-11-23 17:01:21,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bbc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:01:21, skipping insertion in model container [2021-11-23 17:01:21,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:16" (2/3) ... [2021-11-23 17:01:21,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bbc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:01:21, skipping insertion in model container [2021-11-23 17:01:21,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:01:21" (3/3) ... [2021-11-23 17:01:21,403 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-23 17:01:21,408 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:01:21,408 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:01:21,466 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:01:21,473 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 17:01:21,474 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:01:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 1544 states, 1542 states have (on average 1.7801556420233462) internal successors, (2745), 1543 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-23 17:01:21,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:21,572 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:21,572 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1002578946, now seen corresponding path program 1 times [2021-11-23 17:01:21,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:21,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979456066] [2021-11-23 17:01:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:21,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:21,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:21,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:21,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:01:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:22,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:01:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:23,254 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 17:01:23,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:23,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:23,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979456066] [2021-11-23 17:01:23,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979456066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:23,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:23,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:01:23,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566686606] [2021-11-23 17:01:23,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:23,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:01:23,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:01:23,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:01:23,302 INFO L87 Difference]: Start difference. First operand has 1544 states, 1542 states have (on average 1.7801556420233462) internal successors, (2745), 1543 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:23,725 INFO L93 Difference]: Finished difference Result 4577 states and 8140 transitions. [2021-11-23 17:01:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:01:23,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 387 [2021-11-23 17:01:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:23,774 INFO L225 Difference]: With dead ends: 4577 [2021-11-23 17:01:23,774 INFO L226 Difference]: Without dead ends: 3040 [2021-11-23 17:01:23,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:23,797 INFO L933 BasicCegarLoop]: 2698 mSDtfsCounter, 7904 mSDsluCounter, 2640 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7904 SdHoareTripleChecker+Valid, 5338 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:23,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7904 Valid, 5338 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:01:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2021-11-23 17:01:24,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 3038. [2021-11-23 17:01:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 1.680276588738887) internal successors, (5103), 3037 states have internal predecessors, (5103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 5103 transitions. [2021-11-23 17:01:24,052 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 5103 transitions. Word has length 387 [2021-11-23 17:01:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:24,058 INFO L470 AbstractCegarLoop]: Abstraction has 3038 states and 5103 transitions. [2021-11-23 17:01:24,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 5103 transitions. [2021-11-23 17:01:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-23 17:01:24,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:24,075 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:24,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:24,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:24,298 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:24,299 INFO L85 PathProgramCache]: Analyzing trace with hash -874766303, now seen corresponding path program 1 times [2021-11-23 17:01:24,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106851712] [2021-11-23 17:01:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:24,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:24,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:24,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:24,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:01:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:24,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:25,395 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 17:01:25,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:25,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:25,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106851712] [2021-11-23 17:01:25,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106851712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:25,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:25,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:25,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830618328] [2021-11-23 17:01:25,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:25,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:25,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:25,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:25,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:25,400 INFO L87 Difference]: Start difference. First operand 3038 states and 5103 transitions. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:25,661 INFO L93 Difference]: Finished difference Result 6193 states and 10272 transitions. [2021-11-23 17:01:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:25,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 387 [2021-11-23 17:01:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:25,690 INFO L225 Difference]: With dead ends: 6193 [2021-11-23 17:01:25,690 INFO L226 Difference]: Without dead ends: 4290 [2021-11-23 17:01:25,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 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 17:01:25,696 INFO L933 BasicCegarLoop]: 3354 mSDtfsCounter, 1251 mSDsluCounter, 2340 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 5694 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:25,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 5694 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2021-11-23 17:01:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 4288. [2021-11-23 17:01:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 4287 states have (on average 1.6662001399580126) internal successors, (7143), 4287 states have internal predecessors, (7143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 7143 transitions. [2021-11-23 17:01:25,968 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 7143 transitions. Word has length 387 [2021-11-23 17:01:25,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:25,970 INFO L470 AbstractCegarLoop]: Abstraction has 4288 states and 7143 transitions. [2021-11-23 17:01:25,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 7143 transitions. [2021-11-23 17:01:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-23 17:01:25,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:25,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:26,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:26,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:26,205 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:26,206 INFO L85 PathProgramCache]: Analyzing trace with hash -689557105, now seen corresponding path program 1 times [2021-11-23 17:01:26,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:26,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356109097] [2021-11-23 17:01:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:26,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:26,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:26,210 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:26,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:01:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:01:26,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:27,651 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 17:01:27,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:27,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:27,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356109097] [2021-11-23 17:01:27,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356109097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:27,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:27,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:01:27,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522985879] [2021-11-23 17:01:27,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:27,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:01:27,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:27,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:01:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:01:27,655 INFO L87 Difference]: Start difference. First operand 4288 states and 7143 transitions. Second operand has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:28,246 INFO L93 Difference]: Finished difference Result 12760 states and 21250 transitions. [2021-11-23 17:01:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:01:28,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 389 [2021-11-23 17:01:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:28,300 INFO L225 Difference]: With dead ends: 12760 [2021-11-23 17:01:28,300 INFO L226 Difference]: Without dead ends: 8486 [2021-11-23 17:01:28,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:28,316 INFO L933 BasicCegarLoop]: 2621 mSDtfsCounter, 7155 mSDsluCounter, 2476 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7155 SdHoareTripleChecker+Valid, 5097 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:28,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7155 Valid, 5097 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:01:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8486 states. [2021-11-23 17:01:28,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8486 to 8484. [2021-11-23 17:01:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8484 states, 8483 states have (on average 1.659554402923494) internal successors, (14078), 8483 states have internal predecessors, (14078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8484 states to 8484 states and 14078 transitions. [2021-11-23 17:01:28,888 INFO L78 Accepts]: Start accepts. Automaton has 8484 states and 14078 transitions. Word has length 389 [2021-11-23 17:01:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:28,889 INFO L470 AbstractCegarLoop]: Abstraction has 8484 states and 14078 transitions. [2021-11-23 17:01:28,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 8484 states and 14078 transitions. [2021-11-23 17:01:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-11-23 17:01:28,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:28,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:28,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:29,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:29,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2041989101, now seen corresponding path program 1 times [2021-11-23 17:01:29,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:29,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307816127] [2021-11-23 17:01:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:29,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:29,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:29,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:01:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:29,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:30,184 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 17:01:30,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:30,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:30,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307816127] [2021-11-23 17:01:30,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307816127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:30,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:30,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:30,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689685637] [2021-11-23 17:01:30,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:30,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:30,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:30,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:30,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:30,188 INFO L87 Difference]: Start difference. First operand 8484 states and 14078 transitions. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:30,802 INFO L93 Difference]: Finished difference Result 16829 states and 27765 transitions. [2021-11-23 17:01:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 391 [2021-11-23 17:01:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:30,881 INFO L225 Difference]: With dead ends: 16829 [2021-11-23 17:01:30,881 INFO L226 Difference]: Without dead ends: 10530 [2021-11-23 17:01:30,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 389 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 17:01:30,904 INFO L933 BasicCegarLoop]: 3678 mSDtfsCounter, 1559 mSDsluCounter, 2084 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 5762 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:30,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1559 Valid, 5762 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:01:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10530 states. [2021-11-23 17:01:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10530 to 10456. [2021-11-23 17:01:31,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10456 states, 10455 states have (on average 1.6533715925394548) internal successors, (17286), 10455 states have internal predecessors, (17286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10456 states to 10456 states and 17286 transitions. [2021-11-23 17:01:31,481 INFO L78 Accepts]: Start accepts. Automaton has 10456 states and 17286 transitions. Word has length 391 [2021-11-23 17:01:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:31,482 INFO L470 AbstractCegarLoop]: Abstraction has 10456 states and 17286 transitions. [2021-11-23 17:01:31,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:31,484 INFO L276 IsEmpty]: Start isEmpty. Operand 10456 states and 17286 transitions. [2021-11-23 17:01:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-23 17:01:31,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:31,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:31,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:31,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:31,735 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:31,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:31,735 INFO L85 PathProgramCache]: Analyzing trace with hash 721320434, now seen corresponding path program 1 times [2021-11-23 17:01:31,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:31,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422571521] [2021-11-23 17:01:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:31,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:31,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:31,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:31,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:01:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:32,609 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 17:01:32,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:32,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:32,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422571521] [2021-11-23 17:01:32,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422571521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:32,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:32,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:32,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816823407] [2021-11-23 17:01:32,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:32,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:32,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:32,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:32,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:32,612 INFO L87 Difference]: Start difference. First operand 10456 states and 17286 transitions. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:33,442 INFO L93 Difference]: Finished difference Result 31295 states and 51733 transitions. [2021-11-23 17:01:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 393 [2021-11-23 17:01:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:33,505 INFO L225 Difference]: With dead ends: 31295 [2021-11-23 17:01:33,505 INFO L226 Difference]: Without dead ends: 20872 [2021-11-23 17:01:33,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 391 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 17:01:33,528 INFO L933 BasicCegarLoop]: 5101 mSDtfsCounter, 2545 mSDsluCounter, 2551 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2545 SdHoareTripleChecker+Valid, 7652 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:33,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2545 Valid, 7652 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20872 states. [2021-11-23 17:01:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20872 to 10502. [2021-11-23 17:01:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10502 states, 10501 states have (on average 1.6526997428816304) internal successors, (17355), 10501 states have internal predecessors, (17355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10502 states to 10502 states and 17355 transitions. [2021-11-23 17:01:34,228 INFO L78 Accepts]: Start accepts. Automaton has 10502 states and 17355 transitions. Word has length 393 [2021-11-23 17:01:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:34,229 INFO L470 AbstractCegarLoop]: Abstraction has 10502 states and 17355 transitions. [2021-11-23 17:01:34,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 10502 states and 17355 transitions. [2021-11-23 17:01:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-23 17:01:34,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:34,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:34,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 17:01:34,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:34,476 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:34,477 INFO L85 PathProgramCache]: Analyzing trace with hash 724586029, now seen corresponding path program 1 times [2021-11-23 17:01:34,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:34,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763595205] [2021-11-23 17:01:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:34,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:34,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:34,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:34,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:01:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:34,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:01:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:35,525 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 17:01:35,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:35,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:35,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763595205] [2021-11-23 17:01:35,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763595205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:35,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:35,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:01:35,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077310831] [2021-11-23 17:01:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:35,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:01:35,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:01:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:01:35,528 INFO L87 Difference]: Start difference. First operand 10502 states and 17355 transitions. Second operand has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:36,525 INFO L93 Difference]: Finished difference Result 31141 states and 51464 transitions. [2021-11-23 17:01:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:01:36,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 393 [2021-11-23 17:01:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:36,573 INFO L225 Difference]: With dead ends: 31141 [2021-11-23 17:01:36,573 INFO L226 Difference]: Without dead ends: 20720 [2021-11-23 17:01:36,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:36,595 INFO L933 BasicCegarLoop]: 4057 mSDtfsCounter, 5822 mSDsluCounter, 2470 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5822 SdHoareTripleChecker+Valid, 6527 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:36,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5822 Valid, 6527 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:01:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20720 states. [2021-11-23 17:01:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20720 to 20718. [2021-11-23 17:01:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20718 states, 20717 states have (on average 1.6468600666119613) internal successors, (34118), 20717 states have internal predecessors, (34118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:37,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20718 states to 20718 states and 34118 transitions. [2021-11-23 17:01:37,691 INFO L78 Accepts]: Start accepts. Automaton has 20718 states and 34118 transitions. Word has length 393 [2021-11-23 17:01:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:37,692 INFO L470 AbstractCegarLoop]: Abstraction has 20718 states and 34118 transitions. [2021-11-23 17:01:37,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 20718 states and 34118 transitions. [2021-11-23 17:01:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-11-23 17:01:37,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:37,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:37,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:37,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:37,963 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:37,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1022184589, now seen corresponding path program 1 times [2021-11-23 17:01:37,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:37,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276480438] [2021-11-23 17:01:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:37,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:37,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:37,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:01:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:38,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:38,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:38,871 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 17:01:38,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:38,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:38,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276480438] [2021-11-23 17:01:38,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276480438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:38,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:38,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:38,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567145395] [2021-11-23 17:01:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:38,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:38,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:38,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:38,875 INFO L87 Difference]: Start difference. First operand 20718 states and 34118 transitions. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:40,312 INFO L93 Difference]: Finished difference Result 62007 states and 102118 transitions. [2021-11-23 17:01:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:40,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 396 [2021-11-23 17:01:40,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:40,407 INFO L225 Difference]: With dead ends: 62007 [2021-11-23 17:01:40,408 INFO L226 Difference]: Without dead ends: 41359 [2021-11-23 17:01:40,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 394 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 17:01:40,447 INFO L933 BasicCegarLoop]: 5075 mSDtfsCounter, 2537 mSDsluCounter, 2551 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2537 SdHoareTripleChecker+Valid, 7626 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:40,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2537 Valid, 7626 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:01:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41359 states. [2021-11-23 17:01:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41359 to 20781. [2021-11-23 17:01:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20781 states, 20780 states have (on average 1.6456689124157844) internal successors, (34197), 20780 states have internal predecessors, (34197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20781 states to 20781 states and 34197 transitions. [2021-11-23 17:01:41,814 INFO L78 Accepts]: Start accepts. Automaton has 20781 states and 34197 transitions. Word has length 396 [2021-11-23 17:01:41,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:41,814 INFO L470 AbstractCegarLoop]: Abstraction has 20781 states and 34197 transitions. [2021-11-23 17:01:41,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:41,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20781 states and 34197 transitions. [2021-11-23 17:01:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-11-23 17:01:41,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:41,863 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:41,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 17:01:42,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:42,078 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:42,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1102596187, now seen corresponding path program 1 times [2021-11-23 17:01:42,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:42,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200448568] [2021-11-23 17:01:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:42,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:42,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:42,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:42,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:01:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:42,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:01:42,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:43,929 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 17:01:43,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:43,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:43,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200448568] [2021-11-23 17:01:43,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200448568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:43,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:43,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:01:43,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966262392] [2021-11-23 17:01:43,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:43,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:01:43,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:43,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:01:43,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:43,934 INFO L87 Difference]: Start difference. First operand 20781 states and 34197 transitions. Second operand has 5 states, 5 states have (on average 79.2) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:46,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:46,351 INFO L93 Difference]: Finished difference Result 29153 states and 47784 transitions. [2021-11-23 17:01:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:01:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 79.2) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 396 [2021-11-23 17:01:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:46,389 INFO L225 Difference]: With dead ends: 29153 [2021-11-23 17:01:46,389 INFO L226 Difference]: Without dead ends: 20871 [2021-11-23 17:01:46,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:01:46,404 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 1099 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 5765 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:46,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 5765 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 480 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2021-11-23 17:01:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20871 states. [2021-11-23 17:01:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20871 to 20781. [2021-11-23 17:01:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20781 states, 20780 states have (on average 1.6454764196342637) internal successors, (34193), 20780 states have internal predecessors, (34193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20781 states to 20781 states and 34193 transitions. [2021-11-23 17:01:47,413 INFO L78 Accepts]: Start accepts. Automaton has 20781 states and 34193 transitions. Word has length 396 [2021-11-23 17:01:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:47,414 INFO L470 AbstractCegarLoop]: Abstraction has 20781 states and 34193 transitions. [2021-11-23 17:01:47,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.2) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:47,414 INFO L276 IsEmpty]: Start isEmpty. Operand 20781 states and 34193 transitions. [2021-11-23 17:01:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-11-23 17:01:47,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:47,443 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:47,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:47,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:47,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:47,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2143902090, now seen corresponding path program 1 times [2021-11-23 17:01:47,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629617821] [2021-11-23 17:01:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:47,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:47,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:47,661 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:47,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:01:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:48,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:01:48,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:48,867 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 17:01:48,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:48,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:48,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629617821] [2021-11-23 17:01:48,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629617821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:48,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:48,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:01:48,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646685659] [2021-11-23 17:01:48,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:48,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:01:48,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:48,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:01:48,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:01:48,872 INFO L87 Difference]: Start difference. First operand 20781 states and 34193 transitions. Second operand has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:51,181 INFO L93 Difference]: Finished difference Result 61750 states and 101665 transitions. [2021-11-23 17:01:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:01:51,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 396 [2021-11-23 17:01:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:51,233 INFO L225 Difference]: With dead ends: 61750 [2021-11-23 17:01:51,233 INFO L226 Difference]: Without dead ends: 41106 [2021-11-23 17:01:51,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:51,249 INFO L933 BasicCegarLoop]: 4060 mSDtfsCounter, 5811 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5811 SdHoareTripleChecker+Valid, 6533 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:51,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5811 Valid, 6533 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:01:51,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41106 states. [2021-11-23 17:01:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41106 to 41104. [2021-11-23 17:01:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41104 states, 41103 states have (on average 1.6411454151765077) internal successors, (67456), 41103 states have internal predecessors, (67456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41104 states to 41104 states and 67456 transitions. [2021-11-23 17:01:53,267 INFO L78 Accepts]: Start accepts. Automaton has 41104 states and 67456 transitions. Word has length 396 [2021-11-23 17:01:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:53,268 INFO L470 AbstractCegarLoop]: Abstraction has 41104 states and 67456 transitions. [2021-11-23 17:01:53,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 41104 states and 67456 transitions. [2021-11-23 17:01:53,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-11-23 17:01:53,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:53,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:53,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-23 17:01:53,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:53,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1067430317, now seen corresponding path program 1 times [2021-11-23 17:01:53,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:53,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420620349] [2021-11-23 17:01:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:53,541 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:53,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:53,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:53,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:01:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:53,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:01:53,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:54,623 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 17:01:54,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:54,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420620349] [2021-11-23 17:01:54,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420620349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:54,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:54,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:01:54,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885147306] [2021-11-23 17:01:54,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:54,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:01:54,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:54,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:01:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:01:54,626 INFO L87 Difference]: Start difference. First operand 41104 states and 67456 transitions. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:58,919 INFO L93 Difference]: Finished difference Result 121332 states and 199154 transitions. [2021-11-23 17:01:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:01:58,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 398 [2021-11-23 17:01:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:59,058 INFO L225 Difference]: With dead ends: 121332 [2021-11-23 17:01:59,058 INFO L226 Difference]: Without dead ends: 80666 [2021-11-23 17:01:59,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:59,109 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 7143 mSDsluCounter, 2471 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7143 SdHoareTripleChecker+Valid, 5068 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:59,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7143 Valid, 5068 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:01:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80666 states. [2021-11-23 17:02:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80666 to 80664. [2021-11-23 17:02:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80664 states, 80663 states have (on average 1.6357437734773068) internal successors, (131944), 80663 states have internal predecessors, (131944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80664 states to 80664 states and 131944 transitions. [2021-11-23 17:02:03,578 INFO L78 Accepts]: Start accepts. Automaton has 80664 states and 131944 transitions. Word has length 398 [2021-11-23 17:02:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:03,578 INFO L470 AbstractCegarLoop]: Abstraction has 80664 states and 131944 transitions. [2021-11-23 17:02:03,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 80664 states and 131944 transitions. [2021-11-23 17:02:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-23 17:02:03,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:03,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:03,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:04,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:04,151 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash -444700370, now seen corresponding path program 1 times [2021-11-23 17:02:04,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:04,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166950081] [2021-11-23 17:02:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:04,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:04,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:04,153 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:04,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed4d4a83-2a39-4f07-88f9-24ed4487809c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:02:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:02:04,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:04,975 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 17:02:04,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:04,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166950081] [2021-11-23 17:02:04,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166950081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:04,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:04,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:02:04,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117612796] [2021-11-23 17:02:04,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:04,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:02:04,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:02:04,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:02:04,979 INFO L87 Difference]: Start difference. First operand 80664 states and 131944 transitions. Second operand has 4 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)