./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7 --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 7b954f9d8b4ab9030eea8f5c4186ef19ab45ad4620470fe362259155373d879e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:44:26,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:44:26,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:44:26,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:44:26,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:44:26,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:44:26,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:44:26,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:44:26,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:44:26,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:44:26,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:44:26,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:44:26,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:44:26,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:44:26,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:44:26,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:44:26,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:44:26,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:44:26,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:44:26,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:44:26,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:44:26,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:44:26,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:44:26,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:44:26,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:44:26,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:44:26,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:44:26,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:44:26,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:44:26,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:44:26,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:44:26,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:44:26,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:44:26,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:44:26,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:44:26,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:44:26,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:44:26,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:44:26,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:44:26,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:44:26,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:44:26,714 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:44:26,760 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:44:26,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:44:26,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:44:26,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:44:26,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:44:26,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:44:26,768 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:44:26,769 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:44:26,769 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:44:26,769 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:44:26,770 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:44:26,770 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:44:26,771 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:44:26,771 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:44:26,771 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:44:26,771 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:44:26,772 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:44:26,772 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:44:26,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:44:26,773 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:44:26,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:44:26,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:44:26,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:44:26,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:44:26,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:44:26,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:44:26,776 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:44:26,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:44:26,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:44:26,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:44:26,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:44:26,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:44:26,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:44:26,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:44:26,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:44:26,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:44:26,778 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:44:26,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:44:26,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:44:26,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:44:26,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:44:26,779 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_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b954f9d8b4ab9030eea8f5c4186ef19ab45ad4620470fe362259155373d879e [2021-11-25 19:44:27,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:44:27,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:44:27,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:44:27,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:44:27,049 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:44:27,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-25 19:44:27,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/data/d4e22146d/128cfcd74b964e99a69b3f4aa65bd604/FLAG241bfae8e [2021-11-25 19:44:27,566 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:44:27,567 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-25 19:44:27,580 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/data/d4e22146d/128cfcd74b964e99a69b3f4aa65bd604/FLAG241bfae8e [2021-11-25 19:44:27,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/data/d4e22146d/128cfcd74b964e99a69b3f4aa65bd604 [2021-11-25 19:44:27,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:44:27,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:44:27,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:44:27,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:44:27,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:44:27,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:44:27" (1/1) ... [2021-11-25 19:44:27,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c13c962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:27, skipping insertion in model container [2021-11-25 19:44:27,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:44:27" (1/1) ... [2021-11-25 19:44:27,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:44:28,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:44:28,264 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_6e395e6e-ec5d-4f15-8902-d8fcab323b62/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5339,5352] [2021-11-25 19:44:28,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:44:28,342 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:44:28,399 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_6e395e6e-ec5d-4f15-8902-d8fcab323b62/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[5339,5352] [2021-11-25 19:44:28,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:44:28,434 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:44:28,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28 WrapperNode [2021-11-25 19:44:28,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:44:28,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:44:28,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:44:28,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:44:28,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (1/1) ... [2021-11-25 19:44:28,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (1/1) ... [2021-11-25 19:44:28,497 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 414 [2021-11-25 19:44:28,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:44:28,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:44:28,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:44:28,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:44:28,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (1/1) ... [2021-11-25 19:44:28,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (1/1) ... [2021-11-25 19:44:28,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (1/1) ... [2021-11-25 19:44:28,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (1/1) ... [2021-11-25 19:44:28,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (1/1) ... [2021-11-25 19:44:28,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (1/1) ... [2021-11-25 19:44:28,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (1/1) ... [2021-11-25 19:44:28,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:44:28,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:44:28,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:44:28,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:44:28,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (1/1) ... [2021-11-25 19:44:28,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:44:28,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:44:28,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:44:28,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:44:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:44:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:44:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:44:28,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:44:28,744 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:44:28,745 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:44:29,116 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:44:29,308 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:44:29,309 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:44:29,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:44:29 BoogieIcfgContainer [2021-11-25 19:44:29,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:44:29,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:44:29,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:44:29,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:44:29,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:44:27" (1/3) ... [2021-11-25 19:44:29,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c411d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:44:29, skipping insertion in model container [2021-11-25 19:44:29,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:44:28" (2/3) ... [2021-11-25 19:44:29,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c411d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:44:29, skipping insertion in model container [2021-11-25 19:44:29,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:44:29" (3/3) ... [2021-11-25 19:44:29,319 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-25 19:44:29,325 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:44:29,325 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:44:29,373 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:44:29,380 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 [2021-11-25 19:44:29,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:44:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.6883116883116882) internal successors, (130), 78 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 19:44:29,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:29,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:29,410 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:29,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1311119261, now seen corresponding path program 1 times [2021-11-25 19:44:29,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:29,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148492959] [2021-11-25 19:44:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:29,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:29,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:29,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148492959] [2021-11-25 19:44:29,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148492959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:29,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:29,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:44:29,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924467008] [2021-11-25 19:44:29,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:29,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:44:29,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:29,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:44:29,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:44:29,833 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.6883116883116882) internal successors, (130), 78 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:29,922 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2021-11-25 19:44:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:44:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-25 19:44:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:29,934 INFO L225 Difference]: With dead ends: 179 [2021-11-25 19:44:29,936 INFO L226 Difference]: Without dead ends: 122 [2021-11-25 19:44:29,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:44:29,942 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 94 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:29,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 253 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:44:29,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-25 19:44:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-11-25 19:44:29,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.403361344537815) internal successors, (167), 119 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 167 transitions. [2021-11-25 19:44:29,990 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 167 transitions. Word has length 37 [2021-11-25 19:44:29,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:29,990 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 167 transitions. [2021-11-25 19:44:29,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 167 transitions. [2021-11-25 19:44:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 19:44:29,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:29,993 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] [2021-11-25 19:44:29,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:44:29,993 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:29,994 INFO L85 PathProgramCache]: Analyzing trace with hash -224166524, now seen corresponding path program 1 times [2021-11-25 19:44:29,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:29,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768704493] [2021-11-25 19:44:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:29,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:30,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768704493] [2021-11-25 19:44:30,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768704493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:30,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:30,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:44:30,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341977524] [2021-11-25 19:44:30,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:30,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:44:30,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:30,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:44:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:44:30,089 INFO L87 Difference]: Start difference. First operand 120 states and 167 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:30,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:30,162 INFO L93 Difference]: Finished difference Result 286 states and 415 transitions. [2021-11-25 19:44:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:44:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-25 19:44:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:30,166 INFO L225 Difference]: With dead ends: 286 [2021-11-25 19:44:30,166 INFO L226 Difference]: Without dead ends: 192 [2021-11-25 19:44:30,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:44:30,168 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 69 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:30,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 198 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:44:30,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-25 19:44:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-11-25 19:44:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.433862433862434) internal successors, (271), 189 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:30,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 271 transitions. [2021-11-25 19:44:30,261 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 271 transitions. Word has length 39 [2021-11-25 19:44:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:30,262 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 271 transitions. [2021-11-25 19:44:30,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 271 transitions. [2021-11-25 19:44:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 19:44:30,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:30,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:30,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:44:30,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1909742277, now seen corresponding path program 1 times [2021-11-25 19:44:30,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:30,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108184329] [2021-11-25 19:44:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:30,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:30,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:30,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108184329] [2021-11-25 19:44:30,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108184329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:30,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:30,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:44:30,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491866615] [2021-11-25 19:44:30,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:30,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:44:30,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:44:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:44:30,384 INFO L87 Difference]: Start difference. First operand 190 states and 271 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:30,472 INFO L93 Difference]: Finished difference Result 474 states and 693 transitions. [2021-11-25 19:44:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:44:30,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-25 19:44:30,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:30,481 INFO L225 Difference]: With dead ends: 474 [2021-11-25 19:44:30,481 INFO L226 Difference]: Without dead ends: 310 [2021-11-25 19:44:30,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:44:30,489 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 64 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:30,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 183 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:44:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-25 19:44:30,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2021-11-25 19:44:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.4429967426710097) internal successors, (443), 307 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 443 transitions. [2021-11-25 19:44:30,547 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 443 transitions. Word has length 42 [2021-11-25 19:44:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:30,547 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 443 transitions. [2021-11-25 19:44:30,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 443 transitions. [2021-11-25 19:44:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 19:44:30,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:30,555 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] [2021-11-25 19:44:30,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:44:30,555 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1720199612, now seen corresponding path program 1 times [2021-11-25 19:44:30,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:30,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694124272] [2021-11-25 19:44:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:30,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:30,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:30,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694124272] [2021-11-25 19:44:30,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694124272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:30,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:30,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:44:30,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743405205] [2021-11-25 19:44:30,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:30,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:44:30,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:44:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:44:30,617 INFO L87 Difference]: Start difference. First operand 308 states and 443 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:30,689 INFO L93 Difference]: Finished difference Result 784 states and 1141 transitions. [2021-11-25 19:44:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:44:30,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-25 19:44:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:30,696 INFO L225 Difference]: With dead ends: 784 [2021-11-25 19:44:30,696 INFO L226 Difference]: Without dead ends: 502 [2021-11-25 19:44:30,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:44:30,710 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 59 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:30,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 168 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:44:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-25 19:44:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 500. [2021-11-25 19:44:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.4328657314629258) internal successors, (715), 499 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 715 transitions. [2021-11-25 19:44:30,771 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 715 transitions. Word has length 45 [2021-11-25 19:44:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:30,772 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 715 transitions. [2021-11-25 19:44:30,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 715 transitions. [2021-11-25 19:44:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:44:30,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:30,788 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] [2021-11-25 19:44:30,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:44:30,788 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash -387890250, now seen corresponding path program 1 times [2021-11-25 19:44:30,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:30,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122673698] [2021-11-25 19:44:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:30,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:30,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:30,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122673698] [2021-11-25 19:44:30,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122673698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:30,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:30,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:44:30,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176011985] [2021-11-25 19:44:30,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:30,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:44:30,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:44:30,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:44:30,948 INFO L87 Difference]: Start difference. First operand 500 states and 715 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:31,211 INFO L93 Difference]: Finished difference Result 2084 states and 2991 transitions. [2021-11-25 19:44:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:44:31,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-25 19:44:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:31,222 INFO L225 Difference]: With dead ends: 2084 [2021-11-25 19:44:31,222 INFO L226 Difference]: Without dead ends: 1610 [2021-11-25 19:44:31,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:44:31,229 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 321 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:31,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 357 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:44:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-11-25 19:44:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1604. [2021-11-25 19:44:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 1.429195258889582) internal successors, (2291), 1603 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2291 transitions. [2021-11-25 19:44:31,427 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2291 transitions. Word has length 48 [2021-11-25 19:44:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:31,429 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 2291 transitions. [2021-11-25 19:44:31,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:31,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2291 transitions. [2021-11-25 19:44:31,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:44:31,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:31,437 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] [2021-11-25 19:44:31,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:44:31,437 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:31,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1249714829, now seen corresponding path program 1 times [2021-11-25 19:44:31,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:31,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667163550] [2021-11-25 19:44:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:31,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:31,556 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:31,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667163550] [2021-11-25 19:44:31,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667163550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:31,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:31,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:44:31,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883109020] [2021-11-25 19:44:31,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:31,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:44:31,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:44:31,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:44:31,559 INFO L87 Difference]: Start difference. First operand 1604 states and 2291 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:31,960 INFO L93 Difference]: Finished difference Result 4125 states and 5937 transitions. [2021-11-25 19:44:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:44:31,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-25 19:44:31,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:32,000 INFO L225 Difference]: With dead ends: 4125 [2021-11-25 19:44:32,000 INFO L226 Difference]: Without dead ends: 2547 [2021-11-25 19:44:32,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:44:32,004 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 396 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:32,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 108 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:44:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-11-25 19:44:32,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2545. [2021-11-25 19:44:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2544 states have (on average 1.4241352201257862) internal successors, (3623), 2544 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 3623 transitions. [2021-11-25 19:44:32,285 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 3623 transitions. Word has length 50 [2021-11-25 19:44:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:32,285 INFO L470 AbstractCegarLoop]: Abstraction has 2545 states and 3623 transitions. [2021-11-25 19:44:32,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:32,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 3623 transitions. [2021-11-25 19:44:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:44:32,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:32,286 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] [2021-11-25 19:44:32,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:44:32,287 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:32,287 INFO L85 PathProgramCache]: Analyzing trace with hash 625864072, now seen corresponding path program 1 times [2021-11-25 19:44:32,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:32,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832632097] [2021-11-25 19:44:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:32,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:32,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:32,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832632097] [2021-11-25 19:44:32,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832632097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:44:32,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:44:32,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 19:44:32,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663277721] [2021-11-25 19:44:32,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:44:32,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:44:32,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:32,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:44:32,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:44:32,494 INFO L87 Difference]: Start difference. First operand 2545 states and 3623 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:33,277 INFO L93 Difference]: Finished difference Result 5460 states and 7845 transitions. [2021-11-25 19:44:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:44:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-25 19:44:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:33,308 INFO L225 Difference]: With dead ends: 5460 [2021-11-25 19:44:33,308 INFO L226 Difference]: Without dead ends: 5458 [2021-11-25 19:44:33,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:44:33,311 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 843 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:33,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 1108 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:44:33,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2021-11-25 19:44:33,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 2761. [2021-11-25 19:44:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2760 states have (on average 1.4246376811594204) internal successors, (3932), 2760 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3932 transitions. [2021-11-25 19:44:33,661 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3932 transitions. Word has length 50 [2021-11-25 19:44:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:33,663 INFO L470 AbstractCegarLoop]: Abstraction has 2761 states and 3932 transitions. [2021-11-25 19:44:33,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:44:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3932 transitions. [2021-11-25 19:44:33,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 19:44:33,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:33,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:33,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:44:33,666 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:33,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:33,667 INFO L85 PathProgramCache]: Analyzing trace with hash 726357138, now seen corresponding path program 1 times [2021-11-25 19:44:33,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:44:33,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015797714] [2021-11-25 19:44:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:33,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:34,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:34,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015797714] [2021-11-25 19:44:34,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015797714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:44:34,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775616344] [2021-11-25 19:44:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:44:34,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:44:34,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:44:34,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:44:34,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:44:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:34,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-25 19:44:34,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:44:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:36,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:44:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:44,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775616344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:44:44,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [461926324] [2021-11-25 19:44:44,335 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2021-11-25 19:44:44,336 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:44:44,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:44:44,346 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:44:44,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:44:45,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:45,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:45,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:45,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:45,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:45,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 19:44:45,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:44:45,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:44:45,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:44:45,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 19:45:21,318 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:45:50,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35029#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~p4~0) (<= ~p3~0 0) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= 0 ~__return_10575~0) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 ~send4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (<= ~__return_10661~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= 1 ~__return_10449~0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~__return_10661~0) (<= 0 ~p3~0) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~p4~0 0) (<= ~mode1~0 1) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= |#NULL.base| 0) (<= ~st4~0 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (<= 0 ~__return_main~0) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= ~p2~0 0) (<= ~__return_10575~0 1) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= ~__return_10449~0 1) (<= (+ ~p1_old~0 1) 0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|))' at error location [2021-11-25 19:45:50,960 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:45:50,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:45:50,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 46 [2021-11-25 19:45:50,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186657993] [2021-11-25 19:45:50,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:45:50,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 19:45:50,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:45:50,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 19:45:50,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=7585, Unknown=0, NotChecked=0, Total=8742 [2021-11-25 19:45:50,967 INFO L87 Difference]: Start difference. First operand 2761 states and 3932 transitions. Second operand has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:47:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:38,065 INFO L93 Difference]: Finished difference Result 66688 states and 95250 transitions. [2021-11-25 19:47:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 368 states. [2021-11-25 19:47:38,065 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 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 60 [2021-11-25 19:47:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:38,367 INFO L225 Difference]: With dead ends: 66688 [2021-11-25 19:47:38,368 INFO L226 Difference]: Without dead ends: 63974 [2021-11-25 19:47:38,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91833 ImplicationChecksByTransitivity, 117.5s TimeCoverageRelationStatistics Valid=29642, Invalid=176020, Unknown=0, NotChecked=0, Total=205662 [2021-11-25 19:47:38,447 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 15436 mSDsluCounter, 5798 mSDsCounter, 0 mSdLazyCounter, 7944 mSolverCounterSat, 1136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15436 SdHoareTripleChecker+Valid, 6037 SdHoareTripleChecker+Invalid, 9080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1136 IncrementalHoareTripleChecker+Valid, 7944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:38,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15436 Valid, 6037 Invalid, 9080 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1136 Valid, 7944 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2021-11-25 19:47:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63974 states. [2021-11-25 19:47:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63974 to 23049. [2021-11-25 19:47:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23049 states, 23048 states have (on average 1.399600833044082) internal successors, (32258), 23048 states have internal predecessors, (32258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:47:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23049 states to 23049 states and 32258 transitions. [2021-11-25 19:47:43,753 INFO L78 Accepts]: Start accepts. Automaton has 23049 states and 32258 transitions. Word has length 60 [2021-11-25 19:47:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:43,754 INFO L470 AbstractCegarLoop]: Abstraction has 23049 states and 32258 transitions. [2021-11-25 19:47:43,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:47:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 23049 states and 32258 transitions. [2021-11-25 19:47:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 19:47:43,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:43,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:43,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:43,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:47:43,967 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:47:43,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1199702222, now seen corresponding path program 1 times [2021-11-25 19:47:43,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:43,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943620484] [2021-11-25 19:47:43,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:43,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:44,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:44,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943620484] [2021-11-25 19:47:44,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943620484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:44,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467124936] [2021-11-25 19:47:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:44,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:44,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:44,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:44,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:47:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:44,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-25 19:47:44,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:46,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:55,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467124936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:47:55,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2068867946] [2021-11-25 19:47:55,156 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2021-11-25 19:47:55,156 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:55,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:55,157 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:55,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:55,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:55,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:55,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:47:55,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 19:47:55,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:55,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:55,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:55,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:55,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:55,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:55,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 19:48:33,947 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:57,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '181751#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (= 0 ~__return_10661~0) (<= ~send3~0 127) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= 0 ~__return_10575~0) (= ~p4~0 0) (<= ~st3~0 0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= 0 |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~0#1|) (<= ~mode2~0 1) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= 1 ~__return_10449~0) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~0#1| 127) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= ~__return_10575~0 1) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= ~__return_10449~0 1) (<= (+ ~p1_old~0 1) 0) (<= 0 ~send3~0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:57,915 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:57,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:57,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2021-11-25 19:48:57,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489673740] [2021-11-25 19:48:57,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:57,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-25 19:48:57,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:57,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-25 19:48:57,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=7888, Unknown=0, NotChecked=0, Total=9120 [2021-11-25 19:48:57,918 INFO L87 Difference]: Start difference. First operand 23049 states and 32258 transitions. Second operand has 47 states, 47 states have (on average 3.765957446808511) internal successors, (177), 47 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:44,428 INFO L93 Difference]: Finished difference Result 137531 states and 193512 transitions. [2021-11-25 19:50:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 301 states. [2021-11-25 19:50:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.765957446808511) internal successors, (177), 47 states have internal predecessors, (177), 0 states have call successors, (0), 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 60 [2021-11-25 19:50:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:44,888 INFO L225 Difference]: With dead ends: 137531 [2021-11-25 19:50:44,888 INFO L226 Difference]: Without dead ends: 110921 [2021-11-25 19:50:45,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69046 ImplicationChecksByTransitivity, 97.2s TimeCoverageRelationStatistics Valid=21215, Invalid=132057, Unknown=0, NotChecked=0, Total=153272 [2021-11-25 19:50:45,032 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 11576 mSDsluCounter, 6559 mSDsCounter, 0 mSdLazyCounter, 9848 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11576 SdHoareTripleChecker+Valid, 6844 SdHoareTripleChecker+Invalid, 10727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 9848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:45,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11576 Valid, 6844 Invalid, 10727 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [879 Valid, 9848 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-25 19:50:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110921 states. [2021-11-25 19:50:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110921 to 56100. [2021-11-25 19:50:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56100 states, 56099 states have (on average 1.396085491719995) internal successors, (78319), 56099 states have internal predecessors, (78319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56100 states to 56100 states and 78319 transitions. [2021-11-25 19:50:58,326 INFO L78 Accepts]: Start accepts. Automaton has 56100 states and 78319 transitions. Word has length 60 [2021-11-25 19:50:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:58,327 INFO L470 AbstractCegarLoop]: Abstraction has 56100 states and 78319 transitions. [2021-11-25 19:50:58,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.765957446808511) internal successors, (177), 47 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 56100 states and 78319 transitions. [2021-11-25 19:50:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 19:50:58,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:58,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:58,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:58,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e395e6e-ec5d-4f15-8902-d8fcab323b62/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:58,554 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:58,555 INFO L85 PathProgramCache]: Analyzing trace with hash -15551131, now seen corresponding path program 1 times [2021-11-25 19:50:58,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:58,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456090919] [2021-11-25 19:50:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:58,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:50:58,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:58,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456090919] [2021-11-25 19:50:58,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456090919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:58,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:58,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:58,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119692165] [2021-11-25 19:50:58,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:58,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:50:58,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:58,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:50:58,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:50:58,623 INFO L87 Difference]: Start difference. First operand 56100 states and 78319 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)