./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/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 d9bb0fb3fb89b50a98609e7d92154455ef985195351d080b4795952eedc79161 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:39:06,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:39:06,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:39:06,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:39:06,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:39:06,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:39:06,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:39:06,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:39:06,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:39:06,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:39:06,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:39:06,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:39:06,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:39:06,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:39:06,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:39:06,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:39:06,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:39:06,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:39:06,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:39:06,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:39:06,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:39:06,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:39:06,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:39:06,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:39:06,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:39:06,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:39:06,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:39:06,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:39:06,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:39:06,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:39:06,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:39:06,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:39:06,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:39:06,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:39:06,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:39:06,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:39:06,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:39:06,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:39:06,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:39:06,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:39:06,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:39:06,656 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:39:06,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:39:06,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:39:06,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:39:06,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:39:06,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:39:06,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:39:06,710 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:39:06,711 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:39:06,711 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:39:06,711 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:39:06,712 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:39:06,713 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:39:06,713 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:39:06,713 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:39:06,714 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:39:06,714 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:39:06,714 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:39:06,715 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:39:06,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:39:06,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:39:06,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:39:06,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:39:06,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:39:06,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:39:06,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:39:06,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:39:06,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:39:06,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:39:06,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:39:06,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:39:06,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:39:06,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:39:06,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:39:06,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:39:06,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:39:06,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:39:06,723 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:39:06,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:39:06,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:39:06,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:39:06,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:39:06,725 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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9bb0fb3fb89b50a98609e7d92154455ef985195351d080b4795952eedc79161 [2021-11-23 17:39:07,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:39:07,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:39:07,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:39:07,060 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:39:07,061 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:39:07,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2021-11-23 17:39:07,156 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/data/67358d2fa/7460791064f641ba80d3d8c75790cd32/FLAG8c35a5d2d [2021-11-23 17:39:08,029 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:39:08,030 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2021-11-23 17:39:08,073 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/data/67358d2fa/7460791064f641ba80d3d8c75790cd32/FLAG8c35a5d2d [2021-11-23 17:39:08,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/data/67358d2fa/7460791064f641ba80d3d8c75790cd32 [2021-11-23 17:39:08,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:39:08,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:39:08,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:39:08,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:39:08,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:39:08,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:39:08" (1/1) ... [2021-11-23 17:39:08,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b875e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:08, skipping insertion in model container [2021-11-23 17:39:08,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:39:08" (1/1) ... [2021-11-23 17:39:08,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:39:08,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:39:09,152 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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[15482,15495] [2021-11-23 17:39:09,185 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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[17357,17370] [2021-11-23 17:39:10,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:39:10,209 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:39:10,277 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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[15482,15495] [2021-11-23 17:39:10,282 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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[17357,17370] [2021-11-23 17:39:10,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:39:10,890 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:39:10,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10 WrapperNode [2021-11-23 17:39:10,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:39:10,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:39:10,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:39:10,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:39:10,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10" (1/1) ... [2021-11-23 17:39:10,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10" (1/1) ... [2021-11-23 17:39:11,494 INFO L137 Inliner]: procedures = 37, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5149 [2021-11-23 17:39:11,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:39:11,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:39:11,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:39:11,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:39:11,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10" (1/1) ... [2021-11-23 17:39:11,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10" (1/1) ... [2021-11-23 17:39:11,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10" (1/1) ... [2021-11-23 17:39:11,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10" (1/1) ... [2021-11-23 17:39:11,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10" (1/1) ... [2021-11-23 17:39:11,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10" (1/1) ... [2021-11-23 17:39:11,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10" (1/1) ... [2021-11-23 17:39:12,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:39:12,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:39:12,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:39:12,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:39:12,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:10" (1/1) ... [2021-11-23 17:39:12,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:39:12,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:39:12,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:39:12,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:39:12,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:39:12,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:39:12,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:39:12,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:39:12,341 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:39:12,343 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:39:17,449 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:39:17,526 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 17:39:17,533 INFO L158 Benchmark]: Toolchain (without parser) took 8947.62ms. Allocated memory was 117.4MB in the beginning and 549.5MB in the end (delta: 432.0MB). Free memory was 74.1MB in the beginning and 239.3MB in the end (delta: -165.2MB). Peak memory consumption was 266.5MB. Max. memory is 16.1GB. [2021-11-23 17:39:17,533 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 72.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:39:17,536 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2306.24ms. Allocated memory was 117.4MB in the beginning and 161.5MB in the end (delta: 44.0MB). Free memory was 73.8MB in the beginning and 80.7MB in the end (delta: -6.9MB). Peak memory consumption was 64.6MB. Max. memory is 16.1GB. [2021-11-23 17:39:17,538 INFO L158 Benchmark]: Boogie Procedure Inliner took 603.25ms. Allocated memory was 161.5MB in the beginning and 274.7MB in the end (delta: 113.2MB). Free memory was 80.5MB in the beginning and 178.8MB in the end (delta: -98.3MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. [2021-11-23 17:39:17,539 INFO L158 Benchmark]: Boogie Preprocessor took 579.12ms. Allocated memory is still 274.7MB. Free memory was 178.8MB in the beginning and 147.0MB in the end (delta: 31.9MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2021-11-23 17:39:17,541 INFO L158 Benchmark]: RCFGBuilder took 5453.41ms. Allocated memory was 274.7MB in the beginning and 549.5MB in the end (delta: 274.7MB). Free memory was 147.0MB in the beginning and 239.3MB in the end (delta: -92.4MB). Peak memory consumption was 181.5MB. Max. memory is 16.1GB. [2021-11-23 17:39:17,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 72.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2306.24ms. Allocated memory was 117.4MB in the beginning and 161.5MB in the end (delta: 44.0MB). Free memory was 73.8MB in the beginning and 80.7MB in the end (delta: -6.9MB). Peak memory consumption was 64.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 603.25ms. Allocated memory was 161.5MB in the beginning and 274.7MB in the end (delta: 113.2MB). Free memory was 80.5MB in the beginning and 178.8MB in the end (delta: -98.3MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 579.12ms. Allocated memory is still 274.7MB. Free memory was 178.8MB in the beginning and 147.0MB in the end (delta: 31.9MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * RCFGBuilder took 5453.41ms. Allocated memory was 274.7MB in the beginning and 549.5MB in the end (delta: 274.7MB). Free memory was 147.0MB in the beginning and 239.3MB in the end (delta: -92.4MB). Peak memory consumption was 181.5MB. 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 17:39:17,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/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 d9bb0fb3fb89b50a98609e7d92154455ef985195351d080b4795952eedc79161 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:39:20,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:39:20,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:39:20,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:39:20,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:39:20,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:39:20,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:39:20,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:39:20,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:39:20,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:39:20,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:39:20,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:39:20,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:39:20,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:39:20,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:39:20,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:39:20,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:39:20,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:39:20,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:39:20,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:39:20,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:39:20,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:39:20,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:39:20,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:39:20,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:39:20,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:39:20,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:39:20,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:39:20,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:39:20,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:39:20,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:39:20,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:39:20,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:39:20,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:39:20,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:39:20,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:39:20,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:39:20,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:39:20,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:39:20,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:39:20,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:39:20,447 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:39:20,493 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:39:20,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:39:20,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:39:20,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:39:20,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:39:20,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:39:20,495 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:39:20,495 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:39:20,495 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:39:20,495 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:39:20,495 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:39:20,496 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:39:20,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:39:20,497 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:39:20,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:39:20,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:39:20,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:39:20,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:39:20,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:39:20,498 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:39:20,498 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:39:20,498 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:39:20,499 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:39:20,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:39:20,499 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:39:20,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:39:20,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:39:20,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:39:20,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:39:20,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:39:20,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:39:20,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:39:20,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:39:20,501 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:39:20,501 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:20,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:39:20,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:39:20,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:39:20,502 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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9bb0fb3fb89b50a98609e7d92154455ef985195351d080b4795952eedc79161 [2021-11-23 17:39:20,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:39:20,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:39:20,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:39:20,980 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:39:20,980 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:39:20,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2021-11-23 17:39:21,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/data/88231780a/6d3bffb054ee44e1bb0bbce392f885a0/FLAGe167c8d8d [2021-11-23 17:39:22,097 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:39:22,097 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2021-11-23 17:39:22,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/data/88231780a/6d3bffb054ee44e1bb0bbce392f885a0/FLAGe167c8d8d [2021-11-23 17:39:22,597 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/data/88231780a/6d3bffb054ee44e1bb0bbce392f885a0 [2021-11-23 17:39:22,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:39:22,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:39:22,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:39:22,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:39:22,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:39:22,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:39:22" (1/1) ... [2021-11-23 17:39:22,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb880b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:22, skipping insertion in model container [2021-11-23 17:39:22,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:39:22" (1/1) ... [2021-11-23 17:39:22,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:39:22,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:39:23,409 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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[15482,15495] [2021-11-23 17:39:23,458 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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[17357,17370] [2021-11-23 17:39:24,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:39:24,818 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:39:24,914 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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[15482,15495] [2021-11-23 17:39:24,922 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_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[17357,17370] [2021-11-23 17:39:25,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:39:25,738 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:39:25,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25 WrapperNode [2021-11-23 17:39:25,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:39:25,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:39:25,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:39:25,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:39:25,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (1/1) ... [2021-11-23 17:39:25,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (1/1) ... [2021-11-23 17:39:26,181 INFO L137 Inliner]: procedures = 38, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5121 [2021-11-23 17:39:26,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:39:26,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:39:26,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:39:26,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:39:26,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (1/1) ... [2021-11-23 17:39:26,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (1/1) ... [2021-11-23 17:39:26,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (1/1) ... [2021-11-23 17:39:26,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (1/1) ... [2021-11-23 17:39:26,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (1/1) ... [2021-11-23 17:39:26,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (1/1) ... [2021-11-23 17:39:26,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (1/1) ... [2021-11-23 17:39:26,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:39:26,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:39:26,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:39:26,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:39:26,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (1/1) ... [2021-11-23 17:39:26,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:39:26,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:39:26,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:39:26,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:39:26,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:39:26,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:39:26,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:39:26,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:39:26,947 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:39:26,949 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:39:59,341 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:39:59,376 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:39:59,376 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 17:39:59,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:39:59 BoogieIcfgContainer [2021-11-23 17:39:59,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:39:59,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:39:59,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:39:59,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:39:59,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:39:22" (1/3) ... [2021-11-23 17:39:59,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f6d70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:39:59, skipping insertion in model container [2021-11-23 17:39:59,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:39:25" (2/3) ... [2021-11-23 17:39:59,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f6d70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:39:59, skipping insertion in model container [2021-11-23 17:39:59,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:39:59" (3/3) ... [2021-11-23 17:39:59,391 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2021-11-23 17:39:59,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:39:59,398 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 17:39:59,465 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:39:59,474 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 17:39:59,474 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 17:39:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 17:39:59,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:59,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:59,531 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash -442194987, now seen corresponding path program 1 times [2021-11-23 17:39:59,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:59,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445566963] [2021-11-23 17:39:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:59,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:59,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:59,556 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:59,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:39:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:59,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:39:59,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:59,827 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 17:39:59,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:59,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445566963] [2021-11-23 17:39:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445566963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:59,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:59,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:39:59,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708226003] [2021-11-23 17:39:59,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:59,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:59,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:59,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:39:59,911 INFO L87 Difference]: Start difference. First operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:41,930 INFO L93 Difference]: Finished difference Result 2561 states and 4920 transitions. [2021-11-23 17:40:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:41,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 17:40:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:41,975 INFO L225 Difference]: With dead ends: 2561 [2021-11-23 17:40:41,975 INFO L226 Difference]: Without dead ends: 1611 [2021-11-23 17:40:41,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 17:40:41,989 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 1003 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:41,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 667 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 41.7s Time] [2021-11-23 17:40:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-11-23 17:40:42,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2021-11-23 17:40:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1609 states have (on average 1.6451211932877563) internal successors, (2647), 1610 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2647 transitions. [2021-11-23 17:40:42,158 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2647 transitions. Word has length 16 [2021-11-23 17:40:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:42,159 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 2647 transitions. [2021-11-23 17:40:42,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2647 transitions. [2021-11-23 17:40:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 17:40:42,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:42,163 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] [2021-11-23 17:40:42,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:42,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:42,377 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:42,379 INFO L85 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2021-11-23 17:40:42,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:42,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312716497] [2021-11-23 17:40:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:42,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:42,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:42,382 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:42,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:40:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:42,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:40:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:42,713 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 17:40:42,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:42,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:42,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312716497] [2021-11-23 17:40:42,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312716497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:42,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:42,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:40:42,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152232102] [2021-11-23 17:40:42,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:42,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:40:42,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:40:42,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:40:42,718 INFO L87 Difference]: Start difference. First operand 1611 states and 2647 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:42,875 INFO L93 Difference]: Finished difference Result 1675 states and 2746 transitions. [2021-11-23 17:40:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:40:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-23 17:40:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:42,889 INFO L225 Difference]: With dead ends: 1675 [2021-11-23 17:40:42,889 INFO L226 Difference]: Without dead ends: 1611 [2021-11-23 17:40:42,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:40:42,892 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 3 mSDsluCounter, 4811 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6429 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:42,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6429 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:40:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-11-23 17:40:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2021-11-23 17:40:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1609 states have (on average 1.620261031696706) internal successors, (2607), 1610 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2607 transitions. [2021-11-23 17:40:42,951 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2607 transitions. Word has length 38 [2021-11-23 17:40:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:42,952 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 2607 transitions. [2021-11-23 17:40:42,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2607 transitions. [2021-11-23 17:40:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:40:42,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:42,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:42,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:43,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:43,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2021-11-23 17:40:43,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:43,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146117080] [2021-11-23 17:40:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:43,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:43,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:43,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:40:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:43,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:43,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:43,676 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 17:40:43,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:43,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:43,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146117080] [2021-11-23 17:40:43,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146117080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:43,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:43,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:43,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794626101] [2021-11-23 17:40:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:43,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:43,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:43,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:43,680 INFO L87 Difference]: Start difference. First operand 1611 states and 2607 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:43,736 INFO L93 Difference]: Finished difference Result 1725 states and 2787 transitions. [2021-11-23 17:40:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 17:40:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:43,750 INFO L225 Difference]: With dead ends: 1725 [2021-11-23 17:40:43,751 INFO L226 Difference]: Without dead ends: 1665 [2021-11-23 17:40:43,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 17:40:43,753 INFO L933 BasicCegarLoop]: 1661 mSDtfsCounter, 1524 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:43,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1754 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:40:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-11-23 17:40:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2021-11-23 17:40:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1661 states have (on average 1.6195063214930765) internal successors, (2690), 1662 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2690 transitions. [2021-11-23 17:40:43,813 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2690 transitions. Word has length 77 [2021-11-23 17:40:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:43,813 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 2690 transitions. [2021-11-23 17:40:43,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2690 transitions. [2021-11-23 17:40:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:40:43,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:43,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:43,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:44,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:44,032 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:44,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2021-11-23 17:40:44,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:44,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889712299] [2021-11-23 17:40:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:44,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:44,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:44,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:44,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:40:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:44,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:44,455 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 17:40:44,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:44,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:44,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889712299] [2021-11-23 17:40:44,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889712299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:44,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:44,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:44,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538092920] [2021-11-23 17:40:44,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:44,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:44,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:44,458 INFO L87 Difference]: Start difference. First operand 1663 states and 2690 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:44,517 INFO L93 Difference]: Finished difference Result 1875 states and 3026 transitions. [2021-11-23 17:40:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:44,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 17:40:44,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:44,531 INFO L225 Difference]: With dead ends: 1875 [2021-11-23 17:40:44,532 INFO L226 Difference]: Without dead ends: 1763 [2021-11-23 17:40:44,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 17:40:44,535 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1504 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:44,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 1717 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:40:44,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-23 17:40:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2021-11-23 17:40:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1759 states have (on average 1.617396247868107) internal successors, (2845), 1760 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2845 transitions. [2021-11-23 17:40:44,606 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2845 transitions. Word has length 77 [2021-11-23 17:40:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:44,607 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 2845 transitions. [2021-11-23 17:40:44,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2845 transitions. [2021-11-23 17:40:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:40:44,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:44,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:44,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 17:40:44,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:44,825 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:44,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2021-11-23 17:40:44,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:44,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183435150] [2021-11-23 17:40:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:44,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:44,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:44,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:40:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:44,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:40:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:47,567 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 17:40:47,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:47,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:47,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183435150] [2021-11-23 17:40:47,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183435150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:47,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:47,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:40:47,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246968893] [2021-11-23 17:40:47,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:47,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:40:47,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:47,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:40:47,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:40:47,571 INFO L87 Difference]: Start difference. First operand 1761 states and 2845 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:48,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:48,118 INFO L93 Difference]: Finished difference Result 3231 states and 5176 transitions. [2021-11-23 17:40:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:40:48,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 17:40:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:48,147 INFO L225 Difference]: With dead ends: 3231 [2021-11-23 17:40:48,148 INFO L226 Difference]: Without dead ends: 3021 [2021-11-23 17:40:48,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:40:48,152 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 3665 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3665 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:48,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3665 Valid, 2224 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:40:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2021-11-23 17:40:48,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 2177. [2021-11-23 17:40:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2175 states have (on average 1.607816091954023) internal successors, (3497), 2176 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3497 transitions. [2021-11-23 17:40:48,267 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3497 transitions. Word has length 77 [2021-11-23 17:40:48,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:48,268 INFO L470 AbstractCegarLoop]: Abstraction has 2177 states and 3497 transitions. [2021-11-23 17:40:48,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:48,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3497 transitions. [2021-11-23 17:40:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:40:48,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:48,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:48,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:48,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:48,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:48,488 INFO L85 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2021-11-23 17:40:48,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:48,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923227926] [2021-11-23 17:40:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:48,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:48,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:48,491 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:48,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:40:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:48,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:48,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:48,987 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 17:40:48,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:48,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923227926] [2021-11-23 17:40:48,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923227926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:48,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:48,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:48,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095173537] [2021-11-23 17:40:48,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:48,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:48,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:48,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:48,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:48,990 INFO L87 Difference]: Start difference. First operand 2177 states and 3497 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:49,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:49,134 INFO L93 Difference]: Finished difference Result 3105 states and 4954 transitions. [2021-11-23 17:40:49,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:49,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 17:40:49,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:49,154 INFO L225 Difference]: With dead ends: 3105 [2021-11-23 17:40:49,154 INFO L226 Difference]: Without dead ends: 2479 [2021-11-23 17:40:49,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:40:49,161 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 1496 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:49,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1675 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:40:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-11-23 17:40:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2477. [2021-11-23 17:40:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2475 states have (on average 1.5991919191919193) internal successors, (3958), 2476 states have internal predecessors, (3958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:49,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 3958 transitions. [2021-11-23 17:40:49,274 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 3958 transitions. Word has length 79 [2021-11-23 17:40:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:49,275 INFO L470 AbstractCegarLoop]: Abstraction has 2477 states and 3958 transitions. [2021-11-23 17:40:49,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 3958 transitions. [2021-11-23 17:40:49,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:40:49,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:49,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:49,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:49,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:49,493 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2021-11-23 17:40:49,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:49,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688506615] [2021-11-23 17:40:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:49,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:49,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:49,497 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:49,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:40:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:49,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:49,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:49,903 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 17:40:49,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:49,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:49,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688506615] [2021-11-23 17:40:49,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688506615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:49,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:49,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:49,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718917720] [2021-11-23 17:40:49,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:49,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:49,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:49,906 INFO L87 Difference]: Start difference. First operand 2477 states and 3958 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:50,032 INFO L93 Difference]: Finished difference Result 4217 states and 6666 transitions. [2021-11-23 17:40:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:50,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 17:40:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:50,057 INFO L225 Difference]: With dead ends: 4217 [2021-11-23 17:40:50,057 INFO L226 Difference]: Without dead ends: 3293 [2021-11-23 17:40:50,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:40:50,062 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1508 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:50,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 1726 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:40:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2021-11-23 17:40:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 3291. [2021-11-23 17:40:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3289 states have (on average 1.5819397993311037) internal successors, (5203), 3290 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 5203 transitions. [2021-11-23 17:40:50,233 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 5203 transitions. Word has length 79 [2021-11-23 17:40:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:50,234 INFO L470 AbstractCegarLoop]: Abstraction has 3291 states and 5203 transitions. [2021-11-23 17:40:50,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 5203 transitions. [2021-11-23 17:40:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:40:50,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:50,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:50,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 17:40:50,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:50,457 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2021-11-23 17:40:50,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:50,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882727213] [2021-11-23 17:40:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:50,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:50,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:50,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:40:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:50,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:50,857 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 17:40:50,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:50,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:50,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882727213] [2021-11-23 17:40:50,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882727213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:50,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:50,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:50,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832850442] [2021-11-23 17:40:50,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:50,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:50,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:50,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:50,860 INFO L87 Difference]: Start difference. First operand 3291 states and 5203 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:51,114 INFO L93 Difference]: Finished difference Result 6551 states and 10221 transitions. [2021-11-23 17:40:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:51,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 17:40:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:51,150 INFO L225 Difference]: With dead ends: 6551 [2021-11-23 17:40:51,150 INFO L226 Difference]: Without dead ends: 4813 [2021-11-23 17:40:51,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:40:51,155 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 1512 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:51,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 1735 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:40:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4813 states. [2021-11-23 17:40:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4813 to 4811. [2021-11-23 17:40:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4809 states have (on average 1.5585360781867332) internal successors, (7495), 4810 states have internal predecessors, (7495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 7495 transitions. [2021-11-23 17:40:51,418 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 7495 transitions. Word has length 79 [2021-11-23 17:40:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:51,419 INFO L470 AbstractCegarLoop]: Abstraction has 4811 states and 7495 transitions. [2021-11-23 17:40:51,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 7495 transitions. [2021-11-23 17:40:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:40:51,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:51,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:51,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:51,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:51,637 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:51,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2021-11-23 17:40:51,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:51,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747075531] [2021-11-23 17:40:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:51,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:51,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:51,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:51,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:40:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:51,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:51,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:52,037 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 17:40:52,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:52,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:52,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747075531] [2021-11-23 17:40:52,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747075531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:52,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:52,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:52,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428868214] [2021-11-23 17:40:52,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:52,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:52,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:52,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:52,040 INFO L87 Difference]: Start difference. First operand 4811 states and 7495 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:52,387 INFO L93 Difference]: Finished difference Result 10895 states and 16737 transitions. [2021-11-23 17:40:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 17:40:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:52,449 INFO L225 Difference]: With dead ends: 10895 [2021-11-23 17:40:52,449 INFO L226 Difference]: Without dead ends: 7637 [2021-11-23 17:40:52,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:40:52,460 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 1516 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:52,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:40:52,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7637 states. [2021-11-23 17:40:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7637 to 7635. [2021-11-23 17:40:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7635 states, 7633 states have (on average 1.5305908554958731) internal successors, (11683), 7634 states have internal predecessors, (11683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 11683 transitions. [2021-11-23 17:40:53,006 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 11683 transitions. Word has length 79 [2021-11-23 17:40:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:53,006 INFO L470 AbstractCegarLoop]: Abstraction has 7635 states and 11683 transitions. [2021-11-23 17:40:53,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 11683 transitions. [2021-11-23 17:40:53,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:40:53,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:53,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:53,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:53,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:53,222 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:53,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2021-11-23 17:40:53,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:53,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993826125] [2021-11-23 17:40:53,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:53,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:53,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:53,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:53,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:40:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:53,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:53,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:53,636 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 17:40:53,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:53,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:53,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993826125] [2021-11-23 17:40:53,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993826125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:53,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:53,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:53,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140601039] [2021-11-23 17:40:53,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:53,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:53,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:53,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:53,639 INFO L87 Difference]: Start difference. First operand 7635 states and 11683 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:54,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:54,241 INFO L93 Difference]: Finished difference Result 18935 states and 28581 transitions. [2021-11-23 17:40:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:54,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 17:40:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:54,275 INFO L225 Difference]: With dead ends: 18935 [2021-11-23 17:40:54,275 INFO L226 Difference]: Without dead ends: 12853 [2021-11-23 17:40:54,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:40:54,286 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 1520 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:54,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:40:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12853 states. [2021-11-23 17:40:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12853 to 12851. [2021-11-23 17:40:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12851 states, 12849 states have (on average 1.4994941240563469) internal successors, (19267), 12850 states have internal predecessors, (19267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12851 states to 12851 states and 19267 transitions. [2021-11-23 17:40:55,045 INFO L78 Accepts]: Start accepts. Automaton has 12851 states and 19267 transitions. Word has length 79 [2021-11-23 17:40:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:55,045 INFO L470 AbstractCegarLoop]: Abstraction has 12851 states and 19267 transitions. [2021-11-23 17:40:55,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 12851 states and 19267 transitions. [2021-11-23 17:40:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 17:40:55,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:55,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:55,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:55,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:55,264 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:55,265 INFO L85 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2021-11-23 17:40:55,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:55,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950875141] [2021-11-23 17:40:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:55,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:55,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:55,267 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:55,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:40:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:40:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:55,600 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 17:40:55,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:55,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:55,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950875141] [2021-11-23 17:40:55,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950875141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:55,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:55,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:40:55,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776377652] [2021-11-23 17:40:55,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:55,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:40:55,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:40:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:40:55,603 INFO L87 Difference]: Start difference. First operand 12851 states and 19267 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:56,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:56,958 INFO L93 Difference]: Finished difference Result 22879 states and 33732 transitions. [2021-11-23 17:40:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:40:56,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 17:40:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:57,011 INFO L225 Difference]: With dead ends: 22879 [2021-11-23 17:40:57,012 INFO L226 Difference]: Without dead ends: 22877 [2021-11-23 17:40:57,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:40:57,019 INFO L933 BasicCegarLoop]: 1612 mSDtfsCounter, 256 mSDsluCounter, 4733 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 6345 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:57,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 6345 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:40:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22877 states. [2021-11-23 17:40:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22877 to 13523. [2021-11-23 17:40:58,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13523 states, 13521 states have (on average 1.4723023445011463) internal successors, (19907), 13522 states have internal predecessors, (19907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13523 states to 13523 states and 19907 transitions. [2021-11-23 17:40:58,089 INFO L78 Accepts]: Start accepts. Automaton has 13523 states and 19907 transitions. Word has length 80 [2021-11-23 17:40:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:58,090 INFO L470 AbstractCegarLoop]: Abstraction has 13523 states and 19907 transitions. [2021-11-23 17:40:58,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 13523 states and 19907 transitions. [2021-11-23 17:40:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 17:40:58,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:58,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:58,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:58,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:58,307 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:58,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1872923933, now seen corresponding path program 1 times [2021-11-23 17:40:58,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:58,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800916478] [2021-11-23 17:40:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:58,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:58,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:58,310 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:58,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:40:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:58,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:58,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:58,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:58,614 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:58,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800916478] [2021-11-23 17:40:58,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800916478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:58,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:58,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:58,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689824125] [2021-11-23 17:40:58,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:58,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:58,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:58,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:58,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:58,616 INFO L87 Difference]: Start difference. First operand 13523 states and 19907 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:43,227 INFO L93 Difference]: Finished difference Result 16529 states and 24834 transitions. [2021-11-23 17:41:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:41:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 17:41:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:43,266 INFO L225 Difference]: With dead ends: 16529 [2021-11-23 17:41:43,266 INFO L226 Difference]: Without dead ends: 15025 [2021-11-23 17:41:43,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 85 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 17:41:43,273 INFO L933 BasicCegarLoop]: 1290 mSDtfsCounter, 753 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:43,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1439 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 43.9s Time] [2021-11-23 17:41:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15025 states. [2021-11-23 17:41:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15025 to 15025. [2021-11-23 17:41:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15025 states, 15023 states have (on average 1.46861479065433) internal successors, (22063), 15024 states have internal predecessors, (22063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15025 states to 15025 states and 22063 transitions. [2021-11-23 17:41:44,014 INFO L78 Accepts]: Start accepts. Automaton has 15025 states and 22063 transitions. Word has length 87 [2021-11-23 17:41:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:44,015 INFO L470 AbstractCegarLoop]: Abstraction has 15025 states and 22063 transitions. [2021-11-23 17:41:44,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 15025 states and 22063 transitions. [2021-11-23 17:41:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 17:41:44,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:44,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:44,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:44,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:44,231 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:44,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1350127217, now seen corresponding path program 1 times [2021-11-23 17:41:44,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:44,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580680989] [2021-11-23 17:41:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:44,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:44,234 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:44,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:41:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:44,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:41:44,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:44,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:44,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580680989] [2021-11-23 17:41:44,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580680989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:44,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:44,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:41:44,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716474623] [2021-11-23 17:41:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:44,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:41:44,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:41:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:41:44,724 INFO L87 Difference]: Start difference. First operand 15025 states and 22063 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:32,180 INFO L93 Difference]: Finished difference Result 19533 states and 29146 transitions. [2021-11-23 17:42:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:42:32,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-23 17:42:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:32,224 INFO L225 Difference]: With dead ends: 19533 [2021-11-23 17:42:32,224 INFO L226 Difference]: Without dead ends: 16527 [2021-11-23 17:42:32,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 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 17:42:32,236 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 830 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2670 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:32,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 651 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2670 Invalid, 0 Unknown, 0 Unchecked, 46.9s Time] [2021-11-23 17:42:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16527 states. [2021-11-23 17:42:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16527 to 16527. [2021-11-23 17:42:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16527 states, 16525 states have (on average 1.4667473524962178) internal successors, (24238), 16526 states have internal predecessors, (24238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16527 states to 16527 states and 24238 transitions. [2021-11-23 17:42:33,175 INFO L78 Accepts]: Start accepts. Automaton has 16527 states and 24238 transitions. Word has length 90 [2021-11-23 17:42:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:33,175 INFO L470 AbstractCegarLoop]: Abstraction has 16527 states and 24238 transitions. [2021-11-23 17:42:33,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 16527 states and 24238 transitions. [2021-11-23 17:42:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 17:42:33,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:33,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:42:33,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:33,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:42:33,392 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2007737191, now seen corresponding path program 1 times [2021-11-23 17:42:33,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:33,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054306061] [2021-11-23 17:42:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:33,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:33,395 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:33,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:42:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:33,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:42:33,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:33,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:42:33,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054306061] [2021-11-23 17:42:33,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054306061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:42:33,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:42:33,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:42:33,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666382050] [2021-11-23 17:42:33,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:42:33,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:42:33,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:33,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:42:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:42:33,934 INFO L87 Difference]: Start difference. First operand 16527 states and 24238 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:15,302 INFO L93 Difference]: Finished difference Result 25543 states and 37828 transitions. [2021-11-23 17:43:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:43:15,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-23 17:43:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:15,357 INFO L225 Difference]: With dead ends: 25543 [2021-11-23 17:43:15,357 INFO L226 Difference]: Without dead ends: 21035 [2021-11-23 17:43:15,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:43:15,370 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 1056 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:15,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 495 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 40.8s Time] [2021-11-23 17:43:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21035 states. [2021-11-23 17:43:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21035 to 21033. [2021-11-23 17:43:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21033 states, 21031 states have (on average 1.4241833483904711) internal successors, (29952), 21032 states have internal predecessors, (29952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21033 states to 21033 states and 29952 transitions. [2021-11-23 17:43:16,134 INFO L78 Accepts]: Start accepts. Automaton has 21033 states and 29952 transitions. Word has length 91 [2021-11-23 17:43:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:16,134 INFO L470 AbstractCegarLoop]: Abstraction has 21033 states and 29952 transitions. [2021-11-23 17:43:16,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 21033 states and 29952 transitions. [2021-11-23 17:43:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:43:16,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:16,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:16,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:16,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:43:16,361 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:16,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:16,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2021-11-23 17:43:16,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:16,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512280596] [2021-11-23 17:43:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:16,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:16,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:16,365 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:16,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:43:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:16,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:16,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:18,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:20,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:20,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512280596] [2021-11-23 17:43:20,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512280596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:20,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1337532740] [2021-11-23 17:43:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:20,078 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:20,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:20,084 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:20,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:43:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:20,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:43:20,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:20,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:20,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1337532740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:20,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:43:20,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2021-11-23 17:43:20,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460563401] [2021-11-23 17:43:20,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:20,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:43:20,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:43:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:43:20,617 INFO L87 Difference]: Start difference. First operand 21033 states and 29952 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:21,203 INFO L93 Difference]: Finished difference Result 33005 states and 47346 transitions. [2021-11-23 17:43:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:43:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:43:21,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:21,250 INFO L225 Difference]: With dead ends: 33005 [2021-11-23 17:43:21,250 INFO L226 Difference]: Without dead ends: 21035 [2021-11-23 17:43:21,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:43:21,271 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 60 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:21,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 3192 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:43:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21035 states. [2021-11-23 17:43:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21035 to 21033. [2021-11-23 17:43:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21033 states, 21031 states have (on average 1.417336313061671) internal successors, (29808), 21032 states have internal predecessors, (29808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21033 states to 21033 states and 29808 transitions. [2021-11-23 17:43:22,180 INFO L78 Accepts]: Start accepts. Automaton has 21033 states and 29808 transitions. Word has length 112 [2021-11-23 17:43:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:22,180 INFO L470 AbstractCegarLoop]: Abstraction has 21033 states and 29808 transitions. [2021-11-23 17:43:22,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21033 states and 29808 transitions. [2021-11-23 17:43:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:43:22,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:22,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:22,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-23 17:43:22,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:22,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:43:22,589 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2129270657, now seen corresponding path program 1 times [2021-11-23 17:43:22,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:22,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473139209] [2021-11-23 17:43:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:22,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:22,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:22,591 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:22,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:43:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:22,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:22,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:24,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:25,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473139209] [2021-11-23 17:43:25,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473139209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1860547210] [2021-11-23 17:43:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:25,818 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:25,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:25,827 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:25,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 17:43:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:43:25,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:26,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:26,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1860547210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:26,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:43:26,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2021-11-23 17:43:26,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364212084] [2021-11-23 17:43:26,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:26,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:43:26,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:26,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:43:26,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:43:26,310 INFO L87 Difference]: Start difference. First operand 21033 states and 29808 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:26,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:26,781 INFO L93 Difference]: Finished difference Result 27021 states and 38434 transitions. [2021-11-23 17:43:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:43:26,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:43:26,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:26,806 INFO L225 Difference]: With dead ends: 27021 [2021-11-23 17:43:26,806 INFO L226 Difference]: Without dead ends: 15051 [2021-11-23 17:43:26,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:43:26,823 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 56 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:26,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 3177 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:43:26,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15051 states. [2021-11-23 17:43:27,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15051 to 15049. [2021-11-23 17:43:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15049 states, 15047 states have (on average 1.4030703794776367) internal successors, (21112), 15048 states have internal predecessors, (21112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15049 states to 15049 states and 21112 transitions. [2021-11-23 17:43:27,303 INFO L78 Accepts]: Start accepts. Automaton has 15049 states and 21112 transitions. Word has length 112 [2021-11-23 17:43:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:27,303 INFO L470 AbstractCegarLoop]: Abstraction has 15049 states and 21112 transitions. [2021-11-23 17:43:27,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 15049 states and 21112 transitions. [2021-11-23 17:43:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:43:27,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:27,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:27,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:27,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:27,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:27,724 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:27,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:27,724 INFO L85 PathProgramCache]: Analyzing trace with hash -43415061, now seen corresponding path program 1 times [2021-11-23 17:43:27,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:27,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109791019] [2021-11-23 17:43:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:27,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:27,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:27,726 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:27,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:43:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:27,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:27,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:29,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:30,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:30,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109791019] [2021-11-23 17:43:30,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109791019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [455205003] [2021-11-23 17:43:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:30,583 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:30,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:30,588 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:30,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:43:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:30,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:43:30,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:31,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:31,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [455205003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:31,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:43:31,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2021-11-23 17:43:31,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364286940] [2021-11-23 17:43:31,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:31,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:43:31,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:43:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:43:31,017 INFO L87 Difference]: Start difference. First operand 15049 states and 21112 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:31,263 INFO L93 Difference]: Finished difference Result 18045 states and 25390 transitions. [2021-11-23 17:43:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:43:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:43:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:31,278 INFO L225 Difference]: With dead ends: 18045 [2021-11-23 17:43:31,278 INFO L226 Difference]: Without dead ends: 12059 [2021-11-23 17:43:31,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:43:31,288 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 50 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:31,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 3162 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:43:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12059 states. [2021-11-23 17:43:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12059 to 12057. [2021-11-23 17:43:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12057 states, 12055 states have (on average 1.393612608875985) internal successors, (16800), 12056 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12057 states to 12057 states and 16800 transitions. [2021-11-23 17:43:31,640 INFO L78 Accepts]: Start accepts. Automaton has 12057 states and 16800 transitions. Word has length 112 [2021-11-23 17:43:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:31,640 INFO L470 AbstractCegarLoop]: Abstraction has 12057 states and 16800 transitions. [2021-11-23 17:43:31,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 12057 states and 16800 transitions. [2021-11-23 17:43:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:43:31,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:31,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:31,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:31,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:32,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:43:32,046 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:32,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1550869621, now seen corresponding path program 1 times [2021-11-23 17:43:32,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:32,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624684107] [2021-11-23 17:43:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:32,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:32,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:32,049 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:32,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:43:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:32,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:32,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:33,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:34,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:34,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624684107] [2021-11-23 17:43:34,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624684107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:34,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1128938385] [2021-11-23 17:43:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:34,747 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:34,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:34,748 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:34,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:43:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:34,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:43:34,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:35,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:35,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1128938385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:35,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:43:35,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2021-11-23 17:43:35,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808451248] [2021-11-23 17:43:35,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:35,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:43:35,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:43:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:43:35,164 INFO L87 Difference]: Start difference. First operand 12057 states and 16800 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:35,294 INFO L93 Difference]: Finished difference Result 13557 states and 18922 transitions. [2021-11-23 17:43:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:43:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:43:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:35,307 INFO L225 Difference]: With dead ends: 13557 [2021-11-23 17:43:35,307 INFO L226 Difference]: Without dead ends: 10563 [2021-11-23 17:43:35,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:43:35,312 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 46 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:35,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 3147 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:43:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10563 states. [2021-11-23 17:43:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10563 to 10561. [2021-11-23 17:43:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10561 states, 10559 states have (on average 1.3885784638696845) internal successors, (14662), 10560 states have internal predecessors, (14662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10561 states to 10561 states and 14662 transitions. [2021-11-23 17:43:35,568 INFO L78 Accepts]: Start accepts. Automaton has 10561 states and 14662 transitions. Word has length 112 [2021-11-23 17:43:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:35,569 INFO L470 AbstractCegarLoop]: Abstraction has 10561 states and 14662 transitions. [2021-11-23 17:43:35,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand 10561 states and 14662 transitions. [2021-11-23 17:43:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:43:35,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:35,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:35,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:35,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:35,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:35,989 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:35,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1213076479, now seen corresponding path program 1 times [2021-11-23 17:43:35,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:35,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666808412] [2021-11-23 17:43:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:35,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:35,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:35,991 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:35,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:43:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:36,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:36,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:37,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:38,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:38,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666808412] [2021-11-23 17:43:38,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666808412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:38,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1202784897] [2021-11-23 17:43:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:38,717 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:38,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:38,718 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:38,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 17:43:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:38,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:40,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:41,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1202784897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:41,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797761068] [2021-11-23 17:43:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:41,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:43:41,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:43:41,563 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:43:41,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 17:43:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:41,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:41,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:42,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:44,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797761068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:44,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:43:44,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:43:44,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66387692] [2021-11-23 17:43:44,121 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:43:44,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:43:44,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:43:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:43:44,123 INFO L87 Difference]: Start difference. First operand 10561 states and 14662 transitions. Second operand has 16 states, 16 states have (on average 12.1875) internal successors, (195), 15 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:44,657 INFO L93 Difference]: Finished difference Result 11630 states and 16171 transitions. [2021-11-23 17:43:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:43:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.1875) internal successors, (195), 15 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:43:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:44,673 INFO L225 Difference]: With dead ends: 11630 [2021-11-23 17:43:44,673 INFO L226 Difference]: Without dead ends: 10596 [2021-11-23 17:43:44,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:43:44,679 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 5864 mSDsluCounter, 12433 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5864 SdHoareTripleChecker+Valid, 13989 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:44,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5864 Valid, 13989 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2021-11-23 17:43:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10596 states. [2021-11-23 17:43:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10596 to 10595. [2021-11-23 17:43:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10593 states have (on average 1.387992070235061) internal successors, (14703), 10594 states have internal predecessors, (14703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 14703 transitions. [2021-11-23 17:43:44,945 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 14703 transitions. Word has length 112 [2021-11-23 17:43:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:44,946 INFO L470 AbstractCegarLoop]: Abstraction has 10595 states and 14703 transitions. [2021-11-23 17:43:44,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.1875) internal successors, (195), 15 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:44,946 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 14703 transitions. [2021-11-23 17:43:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:43:44,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:44,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:44,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:45,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:45,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:45,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:43:45,561 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash -773739457, now seen corresponding path program 1 times [2021-11-23 17:43:45,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:45,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095475000] [2021-11-23 17:43:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:45,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:45,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:45,563 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:45,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 17:43:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:45,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:45,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:47,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:48,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:48,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095475000] [2021-11-23 17:43:48,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095475000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:48,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1039610653] [2021-11-23 17:43:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:48,393 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:48,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:48,394 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:48,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-23 17:43:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:48,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:50,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:51,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1039610653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:51,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989713150] [2021-11-23 17:43:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:51,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:43:51,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:43:51,316 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:43:51,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 17:43:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:51,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:51,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:53,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:54,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989713150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:54,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:43:54,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:43:54,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031644405] [2021-11-23 17:43:54,235 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:43:54,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:43:54,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:54,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:43:54,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:43:54,236 INFO L87 Difference]: Start difference. First operand 10595 states and 14703 transitions. Second operand has 16 states, 16 states have (on average 12.5625) internal successors, (201), 15 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:54,614 INFO L93 Difference]: Finished difference Result 11678 states and 16224 transitions. [2021-11-23 17:43:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:43:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.5625) internal successors, (201), 15 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:43:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:54,626 INFO L225 Difference]: With dead ends: 11678 [2021-11-23 17:43:54,626 INFO L226 Difference]: Without dead ends: 10644 [2021-11-23 17:43:54,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:43:54,631 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 2975 mSDsluCounter, 15315 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2975 SdHoareTripleChecker+Valid, 16869 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:54,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2975 Valid, 16869 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2021-11-23 17:43:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10644 states. [2021-11-23 17:43:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10644 to 10605. [2021-11-23 17:43:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10605 states, 10603 states have (on average 1.3878147694048855) internal successors, (14715), 10604 states have internal predecessors, (14715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10605 states to 10605 states and 14715 transitions. [2021-11-23 17:43:54,838 INFO L78 Accepts]: Start accepts. Automaton has 10605 states and 14715 transitions. Word has length 112 [2021-11-23 17:43:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:54,838 INFO L470 AbstractCegarLoop]: Abstraction has 10605 states and 14715 transitions. [2021-11-23 17:43:54,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.5625) internal successors, (201), 15 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10605 states and 14715 transitions. [2021-11-23 17:43:54,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:43:54,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:54,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:54,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:55,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-23 17:43:55,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-23 17:43:55,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:55,464 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:55,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1661301493, now seen corresponding path program 1 times [2021-11-23 17:43:55,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:55,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786284672] [2021-11-23 17:43:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:55,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:55,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:55,467 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:55,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:43:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:55,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:43:55,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:55,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:55,875 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:55,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786284672] [2021-11-23 17:43:55,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786284672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:55,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:43:55,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:43:55,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251376547] [2021-11-23 17:43:55,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:55,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:43:55,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:55,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:43:55,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:43:55,876 INFO L87 Difference]: Start difference. First operand 10605 states and 14715 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:55,956 INFO L93 Difference]: Finished difference Result 11157 states and 15487 transitions. [2021-11-23 17:43:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:43:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:43:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:55,967 INFO L225 Difference]: With dead ends: 11157 [2021-11-23 17:43:55,967 INFO L226 Difference]: Without dead ends: 9659 [2021-11-23 17:43:55,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 110 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 17:43:55,972 INFO L933 BasicCegarLoop]: 1596 mSDtfsCounter, 28 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:55,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 3147 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:43:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2021-11-23 17:43:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 9651. [2021-11-23 17:43:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9649 states have (on average 1.3855321795004665) internal successors, (13369), 9650 states have internal predecessors, (13369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 13369 transitions. [2021-11-23 17:43:56,116 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 13369 transitions. Word has length 112 [2021-11-23 17:43:56,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:56,116 INFO L470 AbstractCegarLoop]: Abstraction has 9651 states and 13369 transitions. [2021-11-23 17:43:56,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 13369 transitions. [2021-11-23 17:43:56,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:43:56,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:56,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:56,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:56,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:43:56,320 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash 315683201, now seen corresponding path program 1 times [2021-11-23 17:43:56,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:56,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181160756] [2021-11-23 17:43:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:56,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:56,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:56,323 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:56,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 17:43:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:56,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:43:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:43:57,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:57,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:57,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181160756] [2021-11-23 17:43:57,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181160756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:57,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:43:57,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:43:57,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264838500] [2021-11-23 17:43:57,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:57,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:43:57,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:57,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:43:57,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:43:57,389 INFO L87 Difference]: Start difference. First operand 9651 states and 13369 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:57,573 INFO L93 Difference]: Finished difference Result 10175 states and 14102 transitions. [2021-11-23 17:43:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:43:57,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:43:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:57,587 INFO L225 Difference]: With dead ends: 10175 [2021-11-23 17:43:57,587 INFO L226 Difference]: Without dead ends: 9651 [2021-11-23 17:43:57,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:43:57,590 INFO L933 BasicCegarLoop]: 1560 mSDtfsCounter, 2926 mSDsluCounter, 3041 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2926 SdHoareTripleChecker+Valid, 4601 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:57,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2926 Valid, 4601 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2021-11-23 17:43:57,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9651 states. [2021-11-23 17:43:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9651 to 9651. [2021-11-23 17:43:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9649 states have (on average 1.385428541817805) internal successors, (13368), 9650 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 13368 transitions. [2021-11-23 17:43:57,725 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 13368 transitions. Word has length 112 [2021-11-23 17:43:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:57,725 INFO L470 AbstractCegarLoop]: Abstraction has 9651 states and 13368 transitions. [2021-11-23 17:43:57,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 13368 transitions. [2021-11-23 17:43:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:43:57,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:57,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:57,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:57,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:43:57,940 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:57,941 INFO L85 PathProgramCache]: Analyzing trace with hash 859988097, now seen corresponding path program 1 times [2021-11-23 17:43:57,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:57,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417555779] [2021-11-23 17:43:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:57,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:57,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:57,943 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:57,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:43:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:58,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:43:58,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:43:58,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:58,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:58,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417555779] [2021-11-23 17:43:58,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417555779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:58,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:43:58,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:43:58,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472433338] [2021-11-23 17:43:58,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:58,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:43:58,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:43:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:43:58,992 INFO L87 Difference]: Start difference. First operand 9651 states and 13368 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:59,135 INFO L93 Difference]: Finished difference Result 10179 states and 14106 transitions. [2021-11-23 17:43:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:43:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:43:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:59,146 INFO L225 Difference]: With dead ends: 10179 [2021-11-23 17:43:59,146 INFO L226 Difference]: Without dead ends: 9651 [2021-11-23 17:43:59,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:43:59,149 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 2920 mSDsluCounter, 3145 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2920 SdHoareTripleChecker+Valid, 4708 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:59,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2920 Valid, 4708 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2021-11-23 17:43:59,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9651 states. [2021-11-23 17:43:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9651 to 9651. [2021-11-23 17:43:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9649 states have (on average 1.3853249041351436) internal successors, (13367), 9650 states have internal predecessors, (13367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 13367 transitions. [2021-11-23 17:43:59,284 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 13367 transitions. Word has length 112 [2021-11-23 17:43:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:59,284 INFO L470 AbstractCegarLoop]: Abstraction has 9651 states and 13367 transitions. [2021-11-23 17:43:59,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 13367 transitions. [2021-11-23 17:43:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:43:59,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:59,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:59,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:59,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:43:59,500 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash -815509631, now seen corresponding path program 1 times [2021-11-23 17:43:59,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:59,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288602423] [2021-11-23 17:43:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:59,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:59,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:59,503 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:59,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:43:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:59,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:43:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:44:00,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:00,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:00,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288602423] [2021-11-23 17:44:00,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288602423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:00,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:44:00,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:44:00,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632634906] [2021-11-23 17:44:00,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:00,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:44:00,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:00,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:44:00,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:44:00,603 INFO L87 Difference]: Start difference. First operand 9651 states and 13367 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:00,802 INFO L93 Difference]: Finished difference Result 10183 states and 14110 transitions. [2021-11-23 17:44:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:44:00,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:44:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:00,815 INFO L225 Difference]: With dead ends: 10183 [2021-11-23 17:44:00,816 INFO L226 Difference]: Without dead ends: 9651 [2021-11-23 17:44:00,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:44:00,820 INFO L933 BasicCegarLoop]: 1566 mSDtfsCounter, 1482 mSDsluCounter, 3070 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 4636 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:00,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1482 Valid, 4636 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2021-11-23 17:44:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9651 states. [2021-11-23 17:44:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9651 to 9651. [2021-11-23 17:44:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9649 states have (on average 1.3852212664524821) internal successors, (13366), 9650 states have internal predecessors, (13366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 13366 transitions. [2021-11-23 17:44:00,987 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 13366 transitions. Word has length 112 [2021-11-23 17:44:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:00,988 INFO L470 AbstractCegarLoop]: Abstraction has 9651 states and 13366 transitions. [2021-11-23 17:44:00,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 13366 transitions. [2021-11-23 17:44:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:44:00,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:00,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:01,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:01,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:01,204 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:01,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1695105407, now seen corresponding path program 1 times [2021-11-23 17:44:01,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:01,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964073895] [2021-11-23 17:44:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:01,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:01,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:01,207 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:01,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 17:44:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:44:01,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:44:02,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:02,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:02,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964073895] [2021-11-23 17:44:02,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964073895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:02,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:44:02,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:44:02,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716770337] [2021-11-23 17:44:02,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:02,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:44:02,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:02,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:44:02,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:44:02,192 INFO L87 Difference]: Start difference. First operand 9651 states and 13366 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:02,364 INFO L93 Difference]: Finished difference Result 10187 states and 14114 transitions. [2021-11-23 17:44:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:44:02,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:44:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:02,373 INFO L225 Difference]: With dead ends: 10187 [2021-11-23 17:44:02,373 INFO L226 Difference]: Without dead ends: 9651 [2021-11-23 17:44:02,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:44:02,378 INFO L933 BasicCegarLoop]: 1569 mSDtfsCounter, 2935 mSDsluCounter, 3014 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2935 SdHoareTripleChecker+Valid, 4583 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:02,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2935 Valid, 4583 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-11-23 17:44:02,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9651 states. [2021-11-23 17:44:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9651 to 9651. [2021-11-23 17:44:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9649 states have (on average 1.3851176287698208) internal successors, (13365), 9650 states have internal predecessors, (13365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 13365 transitions. [2021-11-23 17:44:02,503 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 13365 transitions. Word has length 112 [2021-11-23 17:44:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:02,503 INFO L470 AbstractCegarLoop]: Abstraction has 9651 states and 13365 transitions. [2021-11-23 17:44:02,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 13365 transitions. [2021-11-23 17:44:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:44:02,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:02,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:02,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:02,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:02,705 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:02,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1773776257, now seen corresponding path program 1 times [2021-11-23 17:44:02,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:02,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912751848] [2021-11-23 17:44:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:02,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:02,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:02,706 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:02,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:44:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:02,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:44:02,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:44:03,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:03,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:03,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912751848] [2021-11-23 17:44:03,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912751848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:03,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:44:03,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:44:03,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81898195] [2021-11-23 17:44:03,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:03,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:44:03,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:03,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:44:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:44:03,574 INFO L87 Difference]: Start difference. First operand 9651 states and 13365 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:03,718 INFO L93 Difference]: Finished difference Result 10191 states and 14118 transitions. [2021-11-23 17:44:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:44:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:44:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:03,728 INFO L225 Difference]: With dead ends: 10191 [2021-11-23 17:44:03,728 INFO L226 Difference]: Without dead ends: 9651 [2021-11-23 17:44:03,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:44:03,731 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 2938 mSDsluCounter, 3061 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2938 SdHoareTripleChecker+Valid, 4633 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:03,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2938 Valid, 4633 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2021-11-23 17:44:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9651 states. [2021-11-23 17:44:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9651 to 9651. [2021-11-23 17:44:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9649 states have (on average 1.3850139910871593) internal successors, (13364), 9650 states have internal predecessors, (13364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 13364 transitions. [2021-11-23 17:44:03,856 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 13364 transitions. Word has length 112 [2021-11-23 17:44:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:03,856 INFO L470 AbstractCegarLoop]: Abstraction has 9651 states and 13364 transitions. [2021-11-23 17:44:03,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 13364 transitions. [2021-11-23 17:44:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:44:03,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:03,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:03,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:04,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:04,066 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash 795679873, now seen corresponding path program 1 times [2021-11-23 17:44:04,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:04,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352565082] [2021-11-23 17:44:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:04,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:04,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:04,068 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:04,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 17:44:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:04,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:44:04,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:44:04,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:04,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:04,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352565082] [2021-11-23 17:44:04,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352565082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:04,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:44:04,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:44:04,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257825094] [2021-11-23 17:44:04,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:04,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:44:04,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:04,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:44:04,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:44:04,887 INFO L87 Difference]: Start difference. First operand 9651 states and 13364 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:05,105 INFO L93 Difference]: Finished difference Result 10169 states and 14091 transitions. [2021-11-23 17:44:05,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:44:05,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:44:05,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:05,114 INFO L225 Difference]: With dead ends: 10169 [2021-11-23 17:44:05,114 INFO L226 Difference]: Without dead ends: 9625 [2021-11-23 17:44:05,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:44:05,117 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 1477 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 3238 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:05,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 3238 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-11-23 17:44:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9625 states. [2021-11-23 17:44:05,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9625 to 9625. [2021-11-23 17:44:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9623 states have (on average 1.385430738854827) internal successors, (13332), 9624 states have internal predecessors, (13332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 13332 transitions. [2021-11-23 17:44:05,241 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 13332 transitions. Word has length 112 [2021-11-23 17:44:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:05,241 INFO L470 AbstractCegarLoop]: Abstraction has 9625 states and 13332 transitions. [2021-11-23 17:44:05,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 13332 transitions. [2021-11-23 17:44:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 17:44:05,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:05,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:05,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:05,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:05,443 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:05,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:05,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1342629309, now seen corresponding path program 1 times [2021-11-23 17:44:05,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:05,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723375073] [2021-11-23 17:44:05,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:05,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:05,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:05,446 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:05,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 17:44:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:05,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:05,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:07,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:08,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:08,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723375073] [2021-11-23 17:44:08,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723375073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:08,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [761920350] [2021-11-23 17:44:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:08,266 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:08,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:08,267 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:08,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 17:44:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:08,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:08,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:10,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:11,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [761920350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:11,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106253580] [2021-11-23 17:44:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:11,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:11,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:11,029 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:11,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 17:44:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:11,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:11,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:13,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:13,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106253580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:13,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:44:13,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:44:13,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265603407] [2021-11-23 17:44:13,962 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:44:13,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:44:13,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:44:13,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:44:13,964 INFO L87 Difference]: Start difference. First operand 9625 states and 13332 transitions. Second operand has 16 states, 16 states have (on average 12.9375) internal successors, (207), 15 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:14,438 INFO L93 Difference]: Finished difference Result 9819 states and 13604 transitions. [2021-11-23 17:44:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:44:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.9375) internal successors, (207), 15 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-23 17:44:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:14,447 INFO L225 Difference]: With dead ends: 9819 [2021-11-23 17:44:14,447 INFO L226 Difference]: Without dead ends: 9645 [2021-11-23 17:44:14,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:44:14,450 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 4411 mSDsluCounter, 12358 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4411 SdHoareTripleChecker+Valid, 13915 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:14,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4411 Valid, 13915 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2021-11-23 17:44:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9645 states. [2021-11-23 17:44:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9645 to 9633. [2021-11-23 17:44:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9633 states, 9631 states have (on average 1.3855259059287717) internal successors, (13344), 9632 states have internal predecessors, (13344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:14,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9633 states to 9633 states and 13344 transitions. [2021-11-23 17:44:14,582 INFO L78 Accepts]: Start accepts. Automaton has 9633 states and 13344 transitions. Word has length 113 [2021-11-23 17:44:14,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:14,582 INFO L470 AbstractCegarLoop]: Abstraction has 9633 states and 13344 transitions. [2021-11-23 17:44:14,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.9375) internal successors, (207), 15 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:14,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9633 states and 13344 transitions. [2021-11-23 17:44:14,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 17:44:14,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:14,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:14,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:14,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:14,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:15,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:15,185 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash 333341318, now seen corresponding path program 1 times [2021-11-23 17:44:15,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:15,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328529304] [2021-11-23 17:44:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:15,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:15,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:15,187 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:15,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 17:44:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:15,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:15,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:17,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:17,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:17,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328529304] [2021-11-23 17:44:17,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328529304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [479229890] [2021-11-23 17:44:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:17,923 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:17,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:17,924 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:17,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-23 17:44:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:18,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:18,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:20,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:20,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [479229890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:20,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375063949] [2021-11-23 17:44:20,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:20,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:20,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:20,793 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:20,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 17:44:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:20,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:22,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:23,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375063949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:23,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:44:23,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:44:23,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701917779] [2021-11-23 17:44:23,488 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:44:23,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:44:23,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:44:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:44:23,490 INFO L87 Difference]: Start difference. First operand 9633 states and 13344 transitions. Second operand has 16 states, 16 states have (on average 12.9375) internal successors, (207), 15 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:23,857 INFO L93 Difference]: Finished difference Result 10159 states and 14081 transitions. [2021-11-23 17:44:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:44:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.9375) internal successors, (207), 15 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-23 17:44:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:23,867 INFO L225 Difference]: With dead ends: 10159 [2021-11-23 17:44:23,867 INFO L226 Difference]: Without dead ends: 9641 [2021-11-23 17:44:23,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:44:23,870 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 7373 mSDsluCounter, 9475 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7373 SdHoareTripleChecker+Valid, 11032 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:23,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7373 Valid, 11032 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2021-11-23 17:44:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9641 states. [2021-11-23 17:44:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9641 to 9637. [2021-11-23 17:44:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9637 states, 9635 states have (on average 1.3853658536585365) internal successors, (13348), 9636 states have internal predecessors, (13348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9637 states to 9637 states and 13348 transitions. [2021-11-23 17:44:23,988 INFO L78 Accepts]: Start accepts. Automaton has 9637 states and 13348 transitions. Word has length 113 [2021-11-23 17:44:23,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:23,988 INFO L470 AbstractCegarLoop]: Abstraction has 9637 states and 13348 transitions. [2021-11-23 17:44:23,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.9375) internal successors, (207), 15 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 9637 states and 13348 transitions. [2021-11-23 17:44:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 17:44:23,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:23,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:23,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:24,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:24,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:24,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:24,591 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:24,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1201032822, now seen corresponding path program 1 times [2021-11-23 17:44:24,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:24,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60435329] [2021-11-23 17:44:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:24,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:24,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:24,592 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:24,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 17:44:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:24,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:26,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:27,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:27,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60435329] [2021-11-23 17:44:27,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60435329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:27,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124044679] [2021-11-23 17:44:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:27,584 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:27,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:27,585 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:27,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-23 17:44:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:27,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:27,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:29,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:30,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1124044679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:30,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379313666] [2021-11-23 17:44:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:30,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:30,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:30,356 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:30,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 17:44:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:30,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:32,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:33,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379313666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:33,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:44:33,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:44:33,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155272017] [2021-11-23 17:44:33,143 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:44:33,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:44:33,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:44:33,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:44:33,145 INFO L87 Difference]: Start difference. First operand 9637 states and 13348 transitions. Second operand has 16 states, 16 states have (on average 13.3125) internal successors, (213), 15 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:33,521 INFO L93 Difference]: Finished difference Result 10167 states and 14093 transitions. [2021-11-23 17:44:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:44:33,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.3125) internal successors, (213), 15 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-23 17:44:33,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:33,531 INFO L225 Difference]: With dead ends: 10167 [2021-11-23 17:44:33,531 INFO L226 Difference]: Without dead ends: 9649 [2021-11-23 17:44:33,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:44:33,534 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 5922 mSDsluCounter, 10835 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5922 SdHoareTripleChecker+Valid, 12390 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:33,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5922 Valid, 12390 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2021-11-23 17:44:33,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9649 states. [2021-11-23 17:44:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9649 to 9649. [2021-11-23 17:44:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9649 states, 9647 states have (on average 1.3853011298849383) internal successors, (13364), 9648 states have internal predecessors, (13364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9649 states to 9649 states and 13364 transitions. [2021-11-23 17:44:33,665 INFO L78 Accepts]: Start accepts. Automaton has 9649 states and 13364 transitions. Word has length 114 [2021-11-23 17:44:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:33,665 INFO L470 AbstractCegarLoop]: Abstraction has 9649 states and 13364 transitions. [2021-11-23 17:44:33,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.3125) internal successors, (213), 15 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 9649 states and 13364 transitions. [2021-11-23 17:44:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 17:44:33,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:33,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:33,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:33,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-23 17:44:34,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:34,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:34,269 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:34,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:34,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1535157981, now seen corresponding path program 1 times [2021-11-23 17:44:34,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:34,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164196660] [2021-11-23 17:44:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:34,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:34,271 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:34,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 17:44:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:34,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:44:34,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:34,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:34,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:34,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164196660] [2021-11-23 17:44:34,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164196660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:34,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:44:34,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:44:34,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278588138] [2021-11-23 17:44:34,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:34,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:44:34,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:44:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:44:34,759 INFO L87 Difference]: Start difference. First operand 9649 states and 13364 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:13,906 INFO L93 Difference]: Finished difference Result 24673 states and 34518 transitions. [2021-11-23 17:45:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:45:13,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-23 17:45:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:13,922 INFO L225 Difference]: With dead ends: 24673 [2021-11-23 17:45:13,922 INFO L226 Difference]: Without dead ends: 15659 [2021-11-23 17:45:13,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 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 17:45:13,929 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 842 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:13,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 742 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 38.9s Time] [2021-11-23 17:45:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15659 states. [2021-11-23 17:45:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15659 to 15657. [2021-11-23 17:45:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15657 states, 15655 states have (on average 1.2965825614819546) internal successors, (20298), 15656 states have internal predecessors, (20298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15657 states to 15657 states and 20298 transitions. [2021-11-23 17:45:14,115 INFO L78 Accepts]: Start accepts. Automaton has 15657 states and 20298 transitions. Word has length 115 [2021-11-23 17:45:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:14,115 INFO L470 AbstractCegarLoop]: Abstraction has 15657 states and 20298 transitions. [2021-11-23 17:45:14,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 15657 states and 20298 transitions. [2021-11-23 17:45:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 17:45:14,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:14,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:14,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:14,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:14,320 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1855059418, now seen corresponding path program 1 times [2021-11-23 17:45:14,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:14,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289923728] [2021-11-23 17:45:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:14,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:14,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:14,324 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:14,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 17:45:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:14,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:45:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:16,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:17,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:17,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289923728] [2021-11-23 17:45:17,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289923728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:17,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [90733217] [2021-11-23 17:45:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:17,303 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:45:17,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:45:17,304 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:45:17,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-23 17:45:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:17,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:45:17,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:19,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:20,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [90733217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:20,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748221467] [2021-11-23 17:45:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:20,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:45:20,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:45:20,233 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:45:20,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-23 17:45:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:20,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:45:20,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:22,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:23,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748221467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:23,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:45:23,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:45:23,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788843815] [2021-11-23 17:45:23,183 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:45:23,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:45:23,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:45:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:45:23,185 INFO L87 Difference]: Start difference. First operand 15657 states and 20298 transitions. Second operand has 16 states, 16 states have (on average 13.6875) internal successors, (219), 15 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:23,532 INFO L93 Difference]: Finished difference Result 16187 states and 21043 transitions. [2021-11-23 17:45:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:45:23,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.6875) internal successors, (219), 15 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-23 17:45:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:23,547 INFO L225 Difference]: With dead ends: 16187 [2021-11-23 17:45:23,547 INFO L226 Difference]: Without dead ends: 15669 [2021-11-23 17:45:23,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 671 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:45:23,552 INFO L933 BasicCegarLoop]: 1553 mSDtfsCounter, 5929 mSDsluCounter, 12375 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5929 SdHoareTripleChecker+Valid, 13928 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:23,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5929 Valid, 13928 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2021-11-23 17:45:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15669 states. [2021-11-23 17:45:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15669 to 15669. [2021-11-23 17:45:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15669 states, 15667 states have (on average 1.2966107104104168) internal successors, (20314), 15668 states have internal predecessors, (20314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15669 states to 15669 states and 20314 transitions. [2021-11-23 17:45:23,812 INFO L78 Accepts]: Start accepts. Automaton has 15669 states and 20314 transitions. Word has length 115 [2021-11-23 17:45:23,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:23,812 INFO L470 AbstractCegarLoop]: Abstraction has 15669 states and 20314 transitions. [2021-11-23 17:45:23,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.6875) internal successors, (219), 15 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:23,812 INFO L276 IsEmpty]: Start isEmpty. Operand 15669 states and 20314 transitions. [2021-11-23 17:45:23,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 17:45:23,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:23,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:23,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:24,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:24,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-23 17:45:24,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:45:24,414 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:24,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:24,415 INFO L85 PathProgramCache]: Analyzing trace with hash 351191981, now seen corresponding path program 1 times [2021-11-23 17:45:24,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:24,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228359813] [2021-11-23 17:45:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:24,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:24,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:24,416 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:24,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-23 17:45:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:24,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:45:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:26,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:27,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228359813] [2021-11-23 17:45:27,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228359813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [3359189] [2021-11-23 17:45:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:27,494 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:45:27,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:45:27,501 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:45:27,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-23 17:45:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:45:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:29,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:30,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [3359189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:30,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293165541] [2021-11-23 17:45:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:30,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:45:30,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:45:30,743 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:45:30,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-23 17:45:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:30,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:45:30,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:32,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:33,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293165541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:33,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:45:33,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:45:33,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875916051] [2021-11-23 17:45:33,603 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:45:33,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:45:33,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:45:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:45:33,605 INFO L87 Difference]: Start difference. First operand 15669 states and 20314 transitions. Second operand has 16 states, 16 states have (on average 14.0625) internal successors, (225), 15 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:33,967 INFO L93 Difference]: Finished difference Result 16201 states and 21065 transitions. [2021-11-23 17:45:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:45:33,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.0625) internal successors, (225), 15 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-23 17:45:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:33,982 INFO L225 Difference]: With dead ends: 16201 [2021-11-23 17:45:33,982 INFO L226 Difference]: Without dead ends: 15683 [2021-11-23 17:45:33,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:45:33,986 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 4433 mSDsluCounter, 13946 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4433 SdHoareTripleChecker+Valid, 15497 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:33,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4433 Valid, 15497 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2021-11-23 17:45:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15683 states. [2021-11-23 17:45:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15683 to 15681. [2021-11-23 17:45:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15681 states, 15679 states have (on average 1.2967663754065948) internal successors, (20332), 15680 states have internal predecessors, (20332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15681 states to 15681 states and 20332 transitions. [2021-11-23 17:45:34,171 INFO L78 Accepts]: Start accepts. Automaton has 15681 states and 20332 transitions. Word has length 116 [2021-11-23 17:45:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:34,171 INFO L470 AbstractCegarLoop]: Abstraction has 15681 states and 20332 transitions. [2021-11-23 17:45:34,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.0625) internal successors, (225), 15 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:34,172 INFO L276 IsEmpty]: Start isEmpty. Operand 15681 states and 20332 transitions. [2021-11-23 17:45:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 17:45:34,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:34,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:34,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:34,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:34,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:34,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:34,773 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:34,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1569177379, now seen corresponding path program 1 times [2021-11-23 17:45:34,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:34,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218466729] [2021-11-23 17:45:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:34,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:34,775 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:34,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-23 17:45:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:34,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:45:34,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:35,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:35,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:35,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218466729] [2021-11-23 17:45:35,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218466729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:35,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:45:35,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:45:35,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023083960] [2021-11-23 17:45:35,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:35,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:45:35,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:35,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:45:35,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:45:35,109 INFO L87 Difference]: Start difference. First operand 15681 states and 20332 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:35,216 INFO L93 Difference]: Finished difference Result 15943 states and 20697 transitions. [2021-11-23 17:45:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:45:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-23 17:45:35,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:35,232 INFO L225 Difference]: With dead ends: 15943 [2021-11-23 17:45:35,232 INFO L226 Difference]: Without dead ends: 15425 [2021-11-23 17:45:35,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 114 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 17:45:35,236 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 34 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3120 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:35,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 3120 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:45:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15425 states. [2021-11-23 17:45:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15425 to 15423. [2021-11-23 17:45:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15423 states, 15421 states have (on average 1.2945982750794371) internal successors, (19964), 15422 states have internal predecessors, (19964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15423 states to 15423 states and 19964 transitions. [2021-11-23 17:45:35,496 INFO L78 Accepts]: Start accepts. Automaton has 15423 states and 19964 transitions. Word has length 116 [2021-11-23 17:45:35,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:35,496 INFO L470 AbstractCegarLoop]: Abstraction has 15423 states and 19964 transitions. [2021-11-23 17:45:35,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:35,496 INFO L276 IsEmpty]: Start isEmpty. Operand 15423 states and 19964 transitions. [2021-11-23 17:45:35,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:45:35,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:35,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:35,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:35,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:35,698 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:35,698 INFO L85 PathProgramCache]: Analyzing trace with hash 514206833, now seen corresponding path program 1 times [2021-11-23 17:45:35,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:35,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141572070] [2021-11-23 17:45:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:35,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:35,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:35,700 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:35,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 17:45:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:35,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:45:35,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:45:38,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:38,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:38,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141572070] [2021-11-23 17:45:38,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141572070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:38,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:45:38,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:45:38,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098764438] [2021-11-23 17:45:38,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:38,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:45:38,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:38,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:45:38,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:38,092 INFO L87 Difference]: Start difference. First operand 15423 states and 19964 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:38,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:38,489 INFO L93 Difference]: Finished difference Result 16091 states and 20883 transitions. [2021-11-23 17:45:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:45:38,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 17:45:38,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:38,505 INFO L225 Difference]: With dead ends: 16091 [2021-11-23 17:45:38,505 INFO L226 Difference]: Without dead ends: 15831 [2021-11-23 17:45:38,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:38,509 INFO L933 BasicCegarLoop]: 1677 mSDtfsCounter, 3898 mSDsluCounter, 2047 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3898 SdHoareTripleChecker+Valid, 3724 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:38,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3898 Valid, 3724 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:45:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15831 states. [2021-11-23 17:45:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15831 to 15423. [2021-11-23 17:45:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15423 states, 15421 states have (on average 1.2942091952532262) internal successors, (19958), 15422 states have internal predecessors, (19958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15423 states to 15423 states and 19958 transitions. [2021-11-23 17:45:38,695 INFO L78 Accepts]: Start accepts. Automaton has 15423 states and 19958 transitions. Word has length 117 [2021-11-23 17:45:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:38,696 INFO L470 AbstractCegarLoop]: Abstraction has 15423 states and 19958 transitions. [2021-11-23 17:45:38,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 15423 states and 19958 transitions. [2021-11-23 17:45:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:45:38,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:38,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:38,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:38,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:38,898 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:38,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:38,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2016565940, now seen corresponding path program 1 times [2021-11-23 17:45:38,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:38,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226646263] [2021-11-23 17:45:38,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:38,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:38,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:38,899 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:38,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-23 17:45:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:38,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:45:38,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:45:41,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:41,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:41,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226646263] [2021-11-23 17:45:41,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226646263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:41,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:45:41,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:45:41,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184958270] [2021-11-23 17:45:41,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:41,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:45:41,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:45:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:41,587 INFO L87 Difference]: Start difference. First operand 15423 states and 19958 transitions. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:42,041 INFO L93 Difference]: Finished difference Result 16005 states and 20761 transitions. [2021-11-23 17:45:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:45:42,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 17:45:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:42,055 INFO L225 Difference]: With dead ends: 16005 [2021-11-23 17:45:42,055 INFO L226 Difference]: Without dead ends: 15917 [2021-11-23 17:45:42,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:42,058 INFO L933 BasicCegarLoop]: 1685 mSDtfsCounter, 3755 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 3744 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:42,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3755 Valid, 3744 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:45:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15917 states. [2021-11-23 17:45:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15917 to 15513. [2021-11-23 17:45:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15513 states, 15511 states have (on average 1.2944362065630843) internal successors, (20078), 15512 states have internal predecessors, (20078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15513 states to 15513 states and 20078 transitions. [2021-11-23 17:45:42,247 INFO L78 Accepts]: Start accepts. Automaton has 15513 states and 20078 transitions. Word has length 117 [2021-11-23 17:45:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:42,247 INFO L470 AbstractCegarLoop]: Abstraction has 15513 states and 20078 transitions. [2021-11-23 17:45:42,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 15513 states and 20078 transitions. [2021-11-23 17:45:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:45:42,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:42,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:42,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:42,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:42,449 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:42,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash 661102161, now seen corresponding path program 1 times [2021-11-23 17:45:42,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:42,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046480396] [2021-11-23 17:45:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:42,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:42,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:42,451 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:42,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-23 17:45:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:42,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:45:42,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:45:44,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:44,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:44,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046480396] [2021-11-23 17:45:44,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046480396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:44,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:45:44,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:45:44,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687098252] [2021-11-23 17:45:44,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:44,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:45:44,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:44,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:45:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:44,779 INFO L87 Difference]: Start difference. First operand 15513 states and 20078 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:45,136 INFO L93 Difference]: Finished difference Result 16095 states and 20881 transitions. [2021-11-23 17:45:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:45:45,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 17:45:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:45,152 INFO L225 Difference]: With dead ends: 16095 [2021-11-23 17:45:45,152 INFO L226 Difference]: Without dead ends: 16007 [2021-11-23 17:45:45,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:45,157 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 3657 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3657 SdHoareTripleChecker+Valid, 3813 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:45,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3657 Valid, 3813 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:45:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16007 states. [2021-11-23 17:45:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16007 to 15609. [2021-11-23 17:45:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15609 states, 15607 states have (on average 1.29467546613699) internal successors, (20206), 15608 states have internal predecessors, (20206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15609 states to 15609 states and 20206 transitions. [2021-11-23 17:45:45,355 INFO L78 Accepts]: Start accepts. Automaton has 15609 states and 20206 transitions. Word has length 117 [2021-11-23 17:45:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:45,356 INFO L470 AbstractCegarLoop]: Abstraction has 15609 states and 20206 transitions. [2021-11-23 17:45:45,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:45,356 INFO L276 IsEmpty]: Start isEmpty. Operand 15609 states and 20206 transitions. [2021-11-23 17:45:45,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:45:45,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:45,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:45,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:45,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:45,558 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash 300750036, now seen corresponding path program 1 times [2021-11-23 17:45:45,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:45,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863436284] [2021-11-23 17:45:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:45,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:45,560 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:45,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 17:45:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:45:45,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:45:48,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:48,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:48,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863436284] [2021-11-23 17:45:48,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863436284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:48,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:45:48,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:45:48,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308733926] [2021-11-23 17:45:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:48,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:45:48,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:48,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:45:48,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:48,087 INFO L87 Difference]: Start difference. First operand 15609 states and 20206 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:48,425 INFO L93 Difference]: Finished difference Result 16191 states and 21009 transitions. [2021-11-23 17:45:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:45:48,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 17:45:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:48,441 INFO L225 Difference]: With dead ends: 16191 [2021-11-23 17:45:48,441 INFO L226 Difference]: Without dead ends: 16103 [2021-11-23 17:45:48,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:48,445 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 3649 mSDsluCounter, 2109 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3649 SdHoareTripleChecker+Valid, 3802 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:48,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3649 Valid, 3802 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:45:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16103 states. [2021-11-23 17:45:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16103 to 15711. [2021-11-23 17:45:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15711 states, 15709 states have (on average 1.2949264752689542) internal successors, (20342), 15710 states have internal predecessors, (20342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15711 states to 15711 states and 20342 transitions. [2021-11-23 17:45:48,654 INFO L78 Accepts]: Start accepts. Automaton has 15711 states and 20342 transitions. Word has length 117 [2021-11-23 17:45:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:48,654 INFO L470 AbstractCegarLoop]: Abstraction has 15711 states and 20342 transitions. [2021-11-23 17:45:48,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 15711 states and 20342 transitions. [2021-11-23 17:45:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:45:48,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:48,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:48,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:48,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:48,856 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:48,857 INFO L85 PathProgramCache]: Analyzing trace with hash 770455601, now seen corresponding path program 1 times [2021-11-23 17:45:48,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:48,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120265365] [2021-11-23 17:45:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:48,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:48,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:48,859 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:48,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-23 17:45:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:48,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:45:48,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:45:51,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:51,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:51,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120265365] [2021-11-23 17:45:51,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120265365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:51,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:45:51,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:45:51,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773359891] [2021-11-23 17:45:51,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:51,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:45:51,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:45:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:51,322 INFO L87 Difference]: Start difference. First operand 15711 states and 20342 transitions. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:51,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:51,671 INFO L93 Difference]: Finished difference Result 16293 states and 21145 transitions. [2021-11-23 17:45:51,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:45:51,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 17:45:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:51,686 INFO L225 Difference]: With dead ends: 16293 [2021-11-23 17:45:51,686 INFO L226 Difference]: Without dead ends: 16205 [2021-11-23 17:45:51,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:51,690 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 3553 mSDsluCounter, 2204 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3553 SdHoareTripleChecker+Valid, 3898 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:51,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3553 Valid, 3898 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:45:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16205 states. [2021-11-23 17:45:51,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16205 to 15819. [2021-11-23 17:45:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15819 states, 15817 states have (on average 1.2951887209963964) internal successors, (20486), 15818 states have internal predecessors, (20486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15819 states to 15819 states and 20486 transitions. [2021-11-23 17:45:51,974 INFO L78 Accepts]: Start accepts. Automaton has 15819 states and 20486 transitions. Word has length 117 [2021-11-23 17:45:51,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:51,974 INFO L470 AbstractCegarLoop]: Abstraction has 15819 states and 20486 transitions. [2021-11-23 17:45:51,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:51,974 INFO L276 IsEmpty]: Start isEmpty. Operand 15819 states and 20486 transitions. [2021-11-23 17:45:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:45:51,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:51,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:51,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:52,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:52,180 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash 295544564, now seen corresponding path program 1 times [2021-11-23 17:45:52,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:52,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557013132] [2021-11-23 17:45:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:52,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:52,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:52,182 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:52,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-23 17:45:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:52,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:45:52,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:45:54,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:54,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:54,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557013132] [2021-11-23 17:45:54,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557013132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:54,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:45:54,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:45:54,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397162852] [2021-11-23 17:45:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:54,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:45:54,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:45:54,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:54,528 INFO L87 Difference]: Start difference. First operand 15819 states and 20486 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:54,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:54,894 INFO L93 Difference]: Finished difference Result 16401 states and 21289 transitions. [2021-11-23 17:45:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:45:54,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 17:45:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:54,915 INFO L225 Difference]: With dead ends: 16401 [2021-11-23 17:45:54,916 INFO L226 Difference]: Without dead ends: 16313 [2021-11-23 17:45:54,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:45:54,921 INFO L933 BasicCegarLoop]: 1679 mSDtfsCounter, 6750 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6750 SdHoareTripleChecker+Valid, 3708 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:54,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6750 Valid, 3708 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:45:54,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16313 states. [2021-11-23 17:45:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16313 to 15927. [2021-11-23 17:45:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15927 states, 15925 states have (on average 1.2954474097331241) internal successors, (20630), 15926 states have internal predecessors, (20630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15927 states to 15927 states and 20630 transitions. [2021-11-23 17:45:55,172 INFO L78 Accepts]: Start accepts. Automaton has 15927 states and 20630 transitions. Word has length 117 [2021-11-23 17:45:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:55,172 INFO L470 AbstractCegarLoop]: Abstraction has 15927 states and 20630 transitions. [2021-11-23 17:45:55,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 15927 states and 20630 transitions. [2021-11-23 17:45:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:45:55,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:55,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:55,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:55,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:55,393 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash 885655031, now seen corresponding path program 1 times [2021-11-23 17:45:55,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:55,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583674294] [2021-11-23 17:45:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:55,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:55,394 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:55,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-23 17:45:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:55,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 17:45:55,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:20,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:32,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:46:32,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583674294] [2021-11-23 17:46:32,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583674294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:32,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [150336177] [2021-11-23 17:46:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:32,323 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:46:32,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:46:32,324 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:46:32,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-23 17:46:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:46:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:42,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:45,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [150336177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:45,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754485754] [2021-11-23 17:46:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:45,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:46:45,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:46:45,226 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:46:45,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-23 17:46:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:45,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 17:46:45,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:47:33,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:47:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:47:39,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754485754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:47:39,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:47:39,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 17, 15, 41, 34] total 131 [2021-11-23 17:47:39,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121543374] [2021-11-23 17:47:39,887 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:47:39,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-23 17:47:39,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:47:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-23 17:47:39,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2068, Invalid=14961, Unknown=1, NotChecked=0, Total=17030 [2021-11-23 17:47:39,893 INFO L87 Difference]: Start difference. First operand 15927 states and 20630 transitions. Second operand has 131 states, 131 states have (on average 3.717557251908397) internal successors, (487), 131 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:48:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:48:10,823 INFO L93 Difference]: Finished difference Result 16438 states and 21277 transitions. [2021-11-23 17:48:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 17:48:10,824 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.717557251908397) internal successors, (487), 131 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-23 17:48:10,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:48:10,846 INFO L225 Difference]: With dead ends: 16438 [2021-11-23 17:48:10,846 INFO L226 Difference]: Without dead ends: 16260 [2021-11-23 17:48:10,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9029 ImplicationChecksByTransitivity, 94.0s TimeCoverageRelationStatistics Valid=3001, Invalid=22120, Unknown=1, NotChecked=0, Total=25122 [2021-11-23 17:48:10,859 INFO L933 BasicCegarLoop]: 1565 mSDtfsCounter, 25075 mSDsluCounter, 38071 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25075 SdHoareTripleChecker+Valid, 39636 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:48:10,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25075 Valid, 39636 Invalid, 1702 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [40 Valid, 1223 Invalid, 0 Unknown, 439 Unchecked, 2.8s Time] [2021-11-23 17:48:10,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16260 states. [2021-11-23 17:48:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16260 to 15948. [2021-11-23 17:48:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15948 states, 15946 states have (on average 1.2953091684434968) internal successors, (20655), 15947 states have internal predecessors, (20655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:48:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15948 states to 15948 states and 20655 transitions. [2021-11-23 17:48:11,123 INFO L78 Accepts]: Start accepts. Automaton has 15948 states and 20655 transitions. Word has length 118 [2021-11-23 17:48:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:48:11,123 INFO L470 AbstractCegarLoop]: Abstraction has 15948 states and 20655 transitions. [2021-11-23 17:48:11,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.717557251908397) internal successors, (487), 131 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:48:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 15948 states and 20655 transitions. [2021-11-23 17:48:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:48:11,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:48:11,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:48:11,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2021-11-23 17:48:11,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-23 17:48:11,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-23 17:48:11,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:48:11,726 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:48:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:48:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1815950842, now seen corresponding path program 1 times [2021-11-23 17:48:11,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:48:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98471385] [2021-11-23 17:48:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:48:11,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:48:11,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:48:11,728 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:48:11,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-23 17:48:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:48:11,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:48:11,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:48:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:28,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:48:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:48:37,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:48:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98471385] [2021-11-23 17:48:37,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98471385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:48:37,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [11119868] [2021-11-23 17:48:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:48:37,797 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:48:37,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:48:37,798 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:48:37,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-11-23 17:48:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:48:37,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:48:37,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:49:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:49:41,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:49:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:49:47,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [11119868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:49:47,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340993957] [2021-11-23 17:49:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:49:47,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:49:47,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:49:47,307 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:49:47,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-23 17:49:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:49:47,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 17:49:47,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:50:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:50:31,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:50:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:50:39,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340993957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:50:39,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:50:39,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 33, 41, 32, 42, 36] total 136 [2021-11-23 17:50:39,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212011506] [2021-11-23 17:50:39,572 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:50:39,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-23 17:50:39,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:50:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-23 17:50:39,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2110, Invalid=16250, Unknown=0, NotChecked=0, Total=18360 [2021-11-23 17:50:39,578 INFO L87 Difference]: Start difference. First operand 15948 states and 20655 transitions. Second operand has 136 states, 136 states have (on average 3.036764705882353) internal successors, (413), 136 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:51:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:51:03,500 INFO L93 Difference]: Finished difference Result 16200 states and 20975 transitions. [2021-11-23 17:51:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 17:51:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.036764705882353) internal successors, (413), 136 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-23 17:51:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:51:03,517 INFO L225 Difference]: With dead ends: 16200 [2021-11-23 17:51:03,517 INFO L226 Difference]: Without dead ends: 16012 [2021-11-23 17:51:03,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 581 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9548 ImplicationChecksByTransitivity, 121.9s TimeCoverageRelationStatistics Valid=3038, Invalid=24352, Unknown=0, NotChecked=0, Total=27390 [2021-11-23 17:51:03,522 INFO L933 BasicCegarLoop]: 1533 mSDtfsCounter, 20636 mSDsluCounter, 64910 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20636 SdHoareTripleChecker+Valid, 66443 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:51:03,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20636 Valid, 66443 Invalid, 1727 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [23 Valid, 1115 Invalid, 0 Unknown, 589 Unchecked, 2.6s Time] [2021-11-23 17:51:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16012 states. [2021-11-23 17:51:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16012 to 15949. [2021-11-23 17:51:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15949 states, 15947 states have (on average 1.2952906502790493) internal successors, (20656), 15948 states have internal predecessors, (20656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:51:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15949 states to 15949 states and 20656 transitions. [2021-11-23 17:51:03,808 INFO L78 Accepts]: Start accepts. Automaton has 15949 states and 20656 transitions. Word has length 118 [2021-11-23 17:51:03,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:51:03,808 INFO L470 AbstractCegarLoop]: Abstraction has 15949 states and 20656 transitions. [2021-11-23 17:51:03,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.036764705882353) internal successors, (413), 136 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:51:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 15949 states and 20656 transitions. [2021-11-23 17:51:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:51:03,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:51:03,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:51:03,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-11-23 17:51:04,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2021-11-23 17:51:04,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-23 17:51:04,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:51:04,416 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:51:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:51:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash -765030441, now seen corresponding path program 1 times [2021-11-23 17:51:04,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:51:04,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867346387] [2021-11-23 17:51:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:51:04,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:51:04,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:51:04,418 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:51:04,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-23 17:51:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:51:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:51:04,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:51:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:51:06,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:51:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:51:07,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:51:07,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867346387] [2021-11-23 17:51:07,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867346387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:51:07,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1471874685] [2021-11-23 17:51:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:51:07,597 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:51:07,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:51:07,598 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:51:07,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b6242b2-4fd5-48ec-96cb-33c538cac9fc/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2021-11-23 17:51:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:51:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:51:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:51:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:51:54,136 INFO L328 TraceCheckSpWp]: Computing backward predicates...