./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF --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 ee947e38812a78047df5e0d4c922466fc041cf3c45dbdc3424cead9945ce22c5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:04:15,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:04:15,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:04:15,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:04:15,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:04:15,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:04:15,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:04:15,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:04:15,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:04:15,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:04:15,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:04:15,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:04:15,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:04:15,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:04:15,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:04:15,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:04:15,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:04:15,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:04:15,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:04:15,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:04:15,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:04:15,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:04:15,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:04:15,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:04:15,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:04:15,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:04:15,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:04:15,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:04:15,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:04:15,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:04:15,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:04:15,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:04:15,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:04:15,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:04:15,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:04:15,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:04:15,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:04:15,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:04:15,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:04:15,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:04:15,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:04:15,614 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:04:15,656 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:04:15,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:04:15,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:04:15,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:04:15,659 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:04:15,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:04:15,659 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:04:15,659 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:04:15,665 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:04:15,666 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:04:15,667 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:04:15,667 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:04:15,667 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:04:15,668 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:04:15,668 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:04:15,668 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:04:15,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:04:15,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:04:15,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:04:15,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:04:15,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:04:15,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:04:15,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:04:15,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:04:15,671 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:04:15,671 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:04:15,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:04:15,671 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:04:15,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:04:15,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:04:15,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:04:15,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:04:15,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:04:15,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:04:15,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:04:15,675 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:04:15,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:04:15,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:04:15,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:04:15,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:04:15,676 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_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee947e38812a78047df5e0d4c922466fc041cf3c45dbdc3424cead9945ce22c5 [2021-11-12 23:04:15,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:04:16,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:04:16,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:04:16,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:04:16,021 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:04:16,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/eca-rers2012/Problem03_label41.c [2021-11-12 23:04:16,102 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/data/7e4a5eb76/3393ff697fc742af836221f952784a0a/FLAG5b3775604 [2021-11-12 23:04:16,834 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:04:16,834 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/sv-benchmarks/c/eca-rers2012/Problem03_label41.c [2021-11-12 23:04:16,850 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/data/7e4a5eb76/3393ff697fc742af836221f952784a0a/FLAG5b3775604 [2021-11-12 23:04:16,943 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/data/7e4a5eb76/3393ff697fc742af836221f952784a0a [2021-11-12 23:04:16,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:04:16,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:04:16,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:04:16,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:04:16,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:04:16,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:04:16" (1/1) ... [2021-11-12 23:04:16,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4909da2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:16, skipping insertion in model container [2021-11-12 23:04:16,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:04:16" (1/1) ... [2021-11-12 23:04:16,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:04:17,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:04:17,648 WARN L228 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_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/sv-benchmarks/c/eca-rers2012/Problem03_label41.c[58800,58813] [2021-11-12 23:04:17,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:04:17,694 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:04:18,031 WARN L228 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_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/sv-benchmarks/c/eca-rers2012/Problem03_label41.c[58800,58813] [2021-11-12 23:04:18,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:04:18,061 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:04:18,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18 WrapperNode [2021-11-12 23:04:18,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:04:18,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:04:18,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:04:18,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:04:18,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:04:18,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:04:18,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:04:18,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:04:18,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:04:18,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:04:18,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:04:18,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:04:18,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:04:18,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:18,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:04:18,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:04:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:04:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:04:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:04:18,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:04:20,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:04:20,554 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:04:20,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:04:20 BoogieIcfgContainer [2021-11-12 23:04:20,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:04:20,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:04:20,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:04:20,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:04:20,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:04:16" (1/3) ... [2021-11-12 23:04:20,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386b674a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:04:20, skipping insertion in model container [2021-11-12 23:04:20,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18" (2/3) ... [2021-11-12 23:04:20,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386b674a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:04:20, skipping insertion in model container [2021-11-12 23:04:20,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:04:20" (3/3) ... [2021-11-12 23:04:20,566 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label41.c [2021-11-12 23:04:20,572 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:04:20,572 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:04:20,633 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:04:20,640 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 [2021-11-12 23:04:20,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:04:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:04:20,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:20,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:20,694 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash 209349626, now seen corresponding path program 1 times [2021-11-12 23:04:20,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:20,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329609382] [2021-11-12 23:04:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:20,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:21,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:21,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329609382] [2021-11-12 23:04:21,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329609382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:21,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:21,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:04:21,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607775466] [2021-11-12 23:04:21,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:21,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:21,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:21,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:21,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:21,362 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 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 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:22,299 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2021-11-12 23:04:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:22,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-11-12 23:04:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:22,323 INFO L225 Difference]: With dead ends: 440 [2021-11-12 23:04:22,324 INFO L226 Difference]: Without dead ends: 289 [2021-11-12 23:04:22,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:22,333 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 718.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.90ms SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 867.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:22,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 26 Invalid, 626 Unknown, 0 Unchecked, 8.90ms Time], IncrementalHoareTripleChecker [172 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 867.33ms Time] [2021-11-12 23:04:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-12 23:04:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-12 23:04:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.90625) internal successors, (549), 288 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 549 transitions. [2021-11-12 23:04:22,433 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 549 transitions. Word has length 143 [2021-11-12 23:04:22,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:22,437 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 549 transitions. [2021-11-12 23:04:22,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 549 transitions. [2021-11-12 23:04:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 23:04:22,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:22,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:22,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:04:22,454 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1322625508, now seen corresponding path program 1 times [2021-11-12 23:04:22,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:22,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680443392] [2021-11-12 23:04:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:22,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:22,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:22,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680443392] [2021-11-12 23:04:22,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680443392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:22,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:22,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:04:22,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567709022] [2021-11-12 23:04:22,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:22,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:22,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:22,641 INFO L87 Difference]: Start difference. First operand 289 states and 549 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:23,398 INFO L93 Difference]: Finished difference Result 865 states and 1645 transitions. [2021-11-12 23:04:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:23,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2021-11-12 23:04:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:23,402 INFO L225 Difference]: With dead ends: 865 [2021-11-12 23:04:23,403 INFO L226 Difference]: Without dead ends: 577 [2021-11-12 23:04:23,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:23,406 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 609.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.16ms SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 725.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:23,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 48 Invalid, 580 Unknown, 0 Unchecked, 5.16ms Time], IncrementalHoareTripleChecker [91 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 725.97ms Time] [2021-11-12 23:04:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-12 23:04:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2021-11-12 23:04:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7421602787456445) internal successors, (1000), 574 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1000 transitions. [2021-11-12 23:04:23,445 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1000 transitions. Word has length 148 [2021-11-12 23:04:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:23,446 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1000 transitions. [2021-11-12 23:04:23,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1000 transitions. [2021-11-12 23:04:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:04:23,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:23,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:23,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:04:23,454 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:23,456 INFO L85 PathProgramCache]: Analyzing trace with hash 720959103, now seen corresponding path program 1 times [2021-11-12 23:04:23,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:23,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580756562] [2021-11-12 23:04:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:23,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:23,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:23,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580756562] [2021-11-12 23:04:23,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580756562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:23,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888841189] [2021-11-12 23:04:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:23,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:23,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:23,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:23,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:04:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:04:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:04:24,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:04:24,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888841189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:24,539 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:24,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-11-12 23:04:24,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816308388] [2021-11-12 23:04:24,540 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:24,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:24,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:24,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:24,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:24,542 INFO L87 Difference]: Start difference. First operand 575 states and 1000 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:25,274 INFO L93 Difference]: Finished difference Result 1721 states and 2997 transitions. [2021-11-12 23:04:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:25,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 150 [2021-11-12 23:04:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:25,283 INFO L225 Difference]: With dead ends: 1721 [2021-11-12 23:04:25,283 INFO L226 Difference]: Without dead ends: 1147 [2021-11-12 23:04:25,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:25,286 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 577.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 695.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:25,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 94 Invalid, 582 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [45 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 695.58ms Time] [2021-11-12 23:04:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-12 23:04:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2021-11-12 23:04:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.7137870855148343) internal successors, (1964), 1146 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1964 transitions. [2021-11-12 23:04:25,318 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1964 transitions. Word has length 150 [2021-11-12 23:04:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:25,319 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1964 transitions. [2021-11-12 23:04:25,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:25,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1964 transitions. [2021-11-12 23:04:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-12 23:04:25,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:25,326 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:25,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:25,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:25,538 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:25,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2091068197, now seen corresponding path program 1 times [2021-11-12 23:04:25,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:25,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849871147] [2021-11-12 23:04:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:25,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:04:25,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:25,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849871147] [2021-11-12 23:04:25,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849871147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:25,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:25,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:04:25,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170548807] [2021-11-12 23:04:25,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:25,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:25,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:25,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:25,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:25,616 INFO L87 Difference]: Start difference. First operand 1147 states and 1964 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:26,386 INFO L93 Difference]: Finished difference Result 2865 states and 4883 transitions. [2021-11-12 23:04:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 160 [2021-11-12 23:04:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:26,398 INFO L225 Difference]: With dead ends: 2865 [2021-11-12 23:04:26,398 INFO L226 Difference]: Without dead ends: 1719 [2021-11-12 23:04:26,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:26,401 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 155 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 573.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 718.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:26,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 36 Invalid, 606 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [151 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 718.84ms Time] [2021-11-12 23:04:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-11-12 23:04:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2021-11-12 23:04:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.6647264260768335) internal successors, (2860), 1718 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2860 transitions. [2021-11-12 23:04:26,449 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2860 transitions. Word has length 160 [2021-11-12 23:04:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:26,449 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2860 transitions. [2021-11-12 23:04:26,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2860 transitions. [2021-11-12 23:04:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-12 23:04:26,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:26,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:26,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:04:26,454 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1854714177, now seen corresponding path program 1 times [2021-11-12 23:04:26,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:26,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751250752] [2021-11-12 23:04:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:26,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:26,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:26,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751250752] [2021-11-12 23:04:26,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751250752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:26,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:26,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:04:26,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200107011] [2021-11-12 23:04:26,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:26,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:26,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:26,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:26,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:26,523 INFO L87 Difference]: Start difference. First operand 1719 states and 2860 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:27,314 INFO L93 Difference]: Finished difference Result 5153 states and 8577 transitions. [2021-11-12 23:04:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:27,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 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 162 [2021-11-12 23:04:27,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:27,335 INFO L225 Difference]: With dead ends: 5153 [2021-11-12 23:04:27,336 INFO L226 Difference]: Without dead ends: 3435 [2021-11-12 23:04:27,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:27,340 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 138 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 609.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.31ms SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 725.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:27,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 106 Invalid, 581 Unknown, 0 Unchecked, 4.31ms Time], IncrementalHoareTripleChecker [123 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 725.12ms Time] [2021-11-12 23:04:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-11-12 23:04:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2021-11-12 23:04:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.4187536400698892) internal successors, (4872), 3434 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4872 transitions. [2021-11-12 23:04:27,444 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4872 transitions. Word has length 162 [2021-11-12 23:04:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:27,444 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 4872 transitions. [2021-11-12 23:04:27,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4872 transitions. [2021-11-12 23:04:27,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 23:04:27,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:27,452 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:27,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:04:27,452 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:27,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:27,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1051097536, now seen corresponding path program 1 times [2021-11-12 23:04:27,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:27,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006433337] [2021-11-12 23:04:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:27,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:04:27,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:27,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006433337] [2021-11-12 23:04:27,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006433337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:27,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:27,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:04:27,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772311564] [2021-11-12 23:04:27,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:27,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:27,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:27,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:27,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:27,519 INFO L87 Difference]: Start difference. First operand 3435 states and 4872 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:28,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:28,299 INFO L93 Difference]: Finished difference Result 8585 states and 12601 transitions. [2021-11-12 23:04:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:28,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 163 [2021-11-12 23:04:28,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:28,328 INFO L225 Difference]: With dead ends: 8585 [2021-11-12 23:04:28,328 INFO L226 Difference]: Without dead ends: 5151 [2021-11-12 23:04:28,333 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 [2021-11-12 23:04:28,336 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 151 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 583.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.76ms SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 693.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:28,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 257 Invalid, 572 Unknown, 0 Unchecked, 4.76ms Time], IncrementalHoareTripleChecker [164 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 693.43ms Time] [2021-11-12 23:04:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-11-12 23:04:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4579. [2021-11-12 23:04:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4578 states have (on average 1.3599825251201398) internal successors, (6226), 4578 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6226 transitions. [2021-11-12 23:04:28,520 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 6226 transitions. Word has length 163 [2021-11-12 23:04:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:28,520 INFO L470 AbstractCegarLoop]: Abstraction has 4579 states and 6226 transitions. [2021-11-12 23:04:28,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 6226 transitions. [2021-11-12 23:04:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 23:04:28,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:28,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:28,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:04:28,531 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1976638359, now seen corresponding path program 1 times [2021-11-12 23:04:28,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:28,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490345407] [2021-11-12 23:04:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:28,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:04:28,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:28,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490345407] [2021-11-12 23:04:28,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490345407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:28,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:28,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:04:28,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320807421] [2021-11-12 23:04:28,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:28,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:28,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:28,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:28,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:28,635 INFO L87 Difference]: Start difference. First operand 4579 states and 6226 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:29,466 INFO L93 Difference]: Finished difference Result 12734 states and 17245 transitions. [2021-11-12 23:04:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:29,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 192 [2021-11-12 23:04:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:29,511 INFO L225 Difference]: With dead ends: 12734 [2021-11-12 23:04:29,512 INFO L226 Difference]: Without dead ends: 8156 [2021-11-12 23:04:29,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:29,519 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 617.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.96ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 739.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:29,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 124 Invalid, 654 Unknown, 0 Unchecked, 4.96ms Time], IncrementalHoareTripleChecker [14 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 739.05ms Time] [2021-11-12 23:04:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-11-12 23:04:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 8011. [2021-11-12 23:04:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8011 states, 8010 states have (on average 1.348689138576779) internal successors, (10803), 8010 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8011 states to 8011 states and 10803 transitions. [2021-11-12 23:04:29,768 INFO L78 Accepts]: Start accepts. Automaton has 8011 states and 10803 transitions. Word has length 192 [2021-11-12 23:04:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:29,768 INFO L470 AbstractCegarLoop]: Abstraction has 8011 states and 10803 transitions. [2021-11-12 23:04:29,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 8011 states and 10803 transitions. [2021-11-12 23:04:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-12 23:04:29,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:29,783 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:29,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:04:29,783 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1233346202, now seen corresponding path program 1 times [2021-11-12 23:04:29,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:29,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100090222] [2021-11-12 23:04:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:29,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:04:29,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:29,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100090222] [2021-11-12 23:04:29,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100090222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:29,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567501078] [2021-11-12 23:04:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:29,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:29,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:29,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:29,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:04:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:30,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:04:30,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:04:30,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:04:30,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567501078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:30,991 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:30,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-11-12 23:04:30,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589226974] [2021-11-12 23:04:30,992 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:30,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:30,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:30,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:30,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:30,994 INFO L87 Difference]: Start difference. First operand 8011 states and 10803 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:31,832 INFO L93 Difference]: Finished difference Result 22742 states and 30703 transitions. [2021-11-12 23:04:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:31,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-12 23:04:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:31,886 INFO L225 Difference]: With dead ends: 22742 [2021-11-12 23:04:31,886 INFO L226 Difference]: Without dead ends: 14732 [2021-11-12 23:04:31,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:31,899 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 147 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 605.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.41ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 726.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:31,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 103 Invalid, 613 Unknown, 0 Unchecked, 4.41ms Time], IncrementalHoareTripleChecker [67 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 726.61ms Time] [2021-11-12 23:04:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14732 states. [2021-11-12 23:04:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14732 to 14303. [2021-11-12 23:04:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14303 states, 14302 states have (on average 1.3149209900713188) internal successors, (18806), 14302 states have internal predecessors, (18806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14303 states to 14303 states and 18806 transitions. [2021-11-12 23:04:32,315 INFO L78 Accepts]: Start accepts. Automaton has 14303 states and 18806 transitions. Word has length 196 [2021-11-12 23:04:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:32,315 INFO L470 AbstractCegarLoop]: Abstraction has 14303 states and 18806 transitions. [2021-11-12 23:04:32,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 14303 states and 18806 transitions. [2021-11-12 23:04:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-12 23:04:32,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:32,333 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:32,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:32,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:32,554 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:32,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:32,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1769897025, now seen corresponding path program 1 times [2021-11-12 23:04:32,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:32,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576506200] [2021-11-12 23:04:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:32,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:04:32,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:32,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576506200] [2021-11-12 23:04:32,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576506200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:32,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196938099] [2021-11-12 23:04:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:32,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:32,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:32,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:32,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:04:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:32,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:32,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:04:33,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:04:33,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196938099] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:33,762 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:33,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-11-12 23:04:33,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301469675] [2021-11-12 23:04:33,762 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:33,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:33,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:33,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:33,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:33,764 INFO L87 Difference]: Start difference. First operand 14303 states and 18806 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 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) [2021-11-12 23:04:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:34,235 INFO L93 Difference]: Finished difference Result 28033 states and 36920 transitions. [2021-11-12 23:04:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 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 199 [2021-11-12 23:04:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:34,266 INFO L225 Difference]: With dead ends: 28033 [2021-11-12 23:04:34,266 INFO L226 Difference]: Without dead ends: 14160 [2021-11-12 23:04:34,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:34,287 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 299.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 368.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:34,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 368.50ms Time] [2021-11-12 23:04:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2021-11-12 23:04:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 14160. [2021-11-12 23:04:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14160 states, 14159 states have (on average 1.2935235539232997) internal successors, (18315), 14159 states have internal predecessors, (18315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14160 states to 14160 states and 18315 transitions. [2021-11-12 23:04:34,628 INFO L78 Accepts]: Start accepts. Automaton has 14160 states and 18315 transitions. Word has length 199 [2021-11-12 23:04:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:34,628 INFO L470 AbstractCegarLoop]: Abstraction has 14160 states and 18315 transitions. [2021-11-12 23:04:34,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 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) [2021-11-12 23:04:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 14160 states and 18315 transitions. [2021-11-12 23:04:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-12 23:04:34,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:34,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:34,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-12 23:04:34,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:34,878 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1717976481, now seen corresponding path program 1 times [2021-11-12 23:04:34,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:34,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447499526] [2021-11-12 23:04:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:34,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:04:35,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:35,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447499526] [2021-11-12 23:04:35,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447499526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:35,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:35,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:04:35,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684873450] [2021-11-12 23:04:35,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:35,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:35,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:35,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:35,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:35,039 INFO L87 Difference]: Start difference. First operand 14160 states and 18315 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:35,520 INFO L93 Difference]: Finished difference Result 37044 states and 47927 transitions. [2021-11-12 23:04:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:35,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 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 253 [2021-11-12 23:04:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:35,570 INFO L225 Difference]: With dead ends: 37044 [2021-11-12 23:04:35,570 INFO L226 Difference]: Without dead ends: 23314 [2021-11-12 23:04:35,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:35,587 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 148 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 306.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.08ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 365.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:35,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 307 Invalid, 247 Unknown, 0 Unchecked, 3.08ms Time], IncrementalHoareTripleChecker [55 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 365.26ms Time] [2021-11-12 23:04:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23314 states. [2021-11-12 23:04:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23314 to 23312. [2021-11-12 23:04:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23312 states, 23311 states have (on average 1.289219681695337) internal successors, (30053), 23311 states have internal predecessors, (30053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23312 states to 23312 states and 30053 transitions. [2021-11-12 23:04:36,140 INFO L78 Accepts]: Start accepts. Automaton has 23312 states and 30053 transitions. Word has length 253 [2021-11-12 23:04:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:36,141 INFO L470 AbstractCegarLoop]: Abstraction has 23312 states and 30053 transitions. [2021-11-12 23:04:36,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 23312 states and 30053 transitions. [2021-11-12 23:04:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-12 23:04:36,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:36,180 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:36,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:04:36,181 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash -348317428, now seen corresponding path program 1 times [2021-11-12 23:04:36,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:36,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207096174] [2021-11-12 23:04:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:36,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:36,342 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:36,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207096174] [2021-11-12 23:04:36,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207096174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:36,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:36,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:04:36,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520209069] [2021-11-12 23:04:36,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:36,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:36,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:36,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:36,345 INFO L87 Difference]: Start difference. First operand 23312 states and 30053 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:37,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:37,327 INFO L93 Difference]: Finished difference Result 52200 states and 67840 transitions. [2021-11-12 23:04:37,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:37,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 258 [2021-11-12 23:04:37,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:37,387 INFO L225 Difference]: With dead ends: 52200 [2021-11-12 23:04:37,387 INFO L226 Difference]: Without dead ends: 29318 [2021-11-12 23:04:37,412 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 [2021-11-12 23:04:37,413 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 164 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 654.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.95ms SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 769.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:37,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 220 Invalid, 546 Unknown, 0 Unchecked, 4.95ms Time], IncrementalHoareTripleChecker [141 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 769.11ms Time] [2021-11-12 23:04:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29318 states. [2021-11-12 23:04:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29318 to 28889. [2021-11-12 23:04:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28889 states, 28888 states have (on average 1.2575810024923844) internal successors, (36329), 28888 states have internal predecessors, (36329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28889 states to 28889 states and 36329 transitions. [2021-11-12 23:04:38,087 INFO L78 Accepts]: Start accepts. Automaton has 28889 states and 36329 transitions. Word has length 258 [2021-11-12 23:04:38,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:38,088 INFO L470 AbstractCegarLoop]: Abstraction has 28889 states and 36329 transitions. [2021-11-12 23:04:38,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28889 states and 36329 transitions. [2021-11-12 23:04:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-12 23:04:38,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:38,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:38,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:04:38,140 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash -780376318, now seen corresponding path program 1 times [2021-11-12 23:04:38,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:38,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499051030] [2021-11-12 23:04:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:38,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:38,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:38,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499051030] [2021-11-12 23:04:38,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499051030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:38,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:38,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:04:38,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899853092] [2021-11-12 23:04:38,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:38,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:38,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:38,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:38,280 INFO L87 Difference]: Start difference. First operand 28889 states and 36329 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:39,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:39,246 INFO L93 Difference]: Finished difference Result 57062 states and 71776 transitions. [2021-11-12 23:04:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:39,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 262 [2021-11-12 23:04:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:39,300 INFO L225 Difference]: With dead ends: 57062 [2021-11-12 23:04:39,300 INFO L226 Difference]: Without dead ends: 28603 [2021-11-12 23:04:39,319 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 [2021-11-12 23:04:39,320 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 146 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 531.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.60ms SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 734.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:39,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 211 Invalid, 548 Unknown, 0 Unchecked, 4.60ms Time], IncrementalHoareTripleChecker [128 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 734.62ms Time] [2021-11-12 23:04:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28603 states. [2021-11-12 23:04:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28603 to 25171. [2021-11-12 23:04:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25171 states, 25170 states have (on average 1.2260230433055224) internal successors, (30859), 25170 states have internal predecessors, (30859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25171 states to 25171 states and 30859 transitions. [2021-11-12 23:04:39,886 INFO L78 Accepts]: Start accepts. Automaton has 25171 states and 30859 transitions. Word has length 262 [2021-11-12 23:04:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:39,887 INFO L470 AbstractCegarLoop]: Abstraction has 25171 states and 30859 transitions. [2021-11-12 23:04:39,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 25171 states and 30859 transitions. [2021-11-12 23:04:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-12 23:04:39,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:39,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:39,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 23:04:39,917 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:39,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:39,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1739239235, now seen corresponding path program 1 times [2021-11-12 23:04:39,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:39,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446929735] [2021-11-12 23:04:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:39,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:40,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:40,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446929735] [2021-11-12 23:04:40,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446929735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:40,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977187148] [2021-11-12 23:04:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:40,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:40,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:40,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:40,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:04:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:40,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:40,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:04:41,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:04:42,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977187148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:42,549 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:42,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-11-12 23:04:42,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376225451] [2021-11-12 23:04:42,553 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:42,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:42,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:42,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:42,556 INFO L87 Difference]: Start difference. First operand 25171 states and 30859 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:43,366 INFO L93 Difference]: Finished difference Result 51056 states and 62718 transitions. [2021-11-12 23:04:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:43,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 271 [2021-11-12 23:04:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:43,407 INFO L225 Difference]: With dead ends: 51056 [2021-11-12 23:04:43,407 INFO L226 Difference]: Without dead ends: 26458 [2021-11-12 23:04:43,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:43,423 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 538.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.44ms SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 654.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:43,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 617 Unknown, 0 Unchecked, 3.44ms Time], IncrementalHoareTripleChecker [200 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 654.25ms Time] [2021-11-12 23:04:43,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26458 states. [2021-11-12 23:04:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26458 to 25457. [2021-11-12 23:04:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25457 states, 25456 states have (on average 1.2324402891263357) internal successors, (31373), 25456 states have internal predecessors, (31373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:43,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25457 states to 25457 states and 31373 transitions. [2021-11-12 23:04:43,979 INFO L78 Accepts]: Start accepts. Automaton has 25457 states and 31373 transitions. Word has length 271 [2021-11-12 23:04:43,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:43,980 INFO L470 AbstractCegarLoop]: Abstraction has 25457 states and 31373 transitions. [2021-11-12 23:04:43,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 25457 states and 31373 transitions. [2021-11-12 23:04:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-12 23:04:44,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:44,009 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:44,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:44,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-12 23:04:44,222 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash 576372828, now seen corresponding path program 2 times [2021-11-12 23:04:44,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:44,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300787903] [2021-11-12 23:04:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:44,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 134 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:44,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:44,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300787903] [2021-11-12 23:04:44,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300787903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:44,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345453265] [2021-11-12 23:04:44,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:04:44,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:44,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:44,462 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:44,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:04:44,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:04:44,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:04:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:04:45,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:04:45,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345453265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:45,630 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:45,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-11-12 23:04:45,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792980518] [2021-11-12 23:04:45,630 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:45,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:45,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:45,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:45,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:45,632 INFO L87 Difference]: Start difference. First operand 25457 states and 31373 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:46,511 INFO L93 Difference]: Finished difference Result 60065 states and 73587 transitions. [2021-11-12 23:04:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 278 [2021-11-12 23:04:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:46,561 INFO L225 Difference]: With dead ends: 60065 [2021-11-12 23:04:46,561 INFO L226 Difference]: Without dead ends: 35181 [2021-11-12 23:04:46,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:46,582 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 529.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.15ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 648.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:46,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 118 Invalid, 553 Unknown, 0 Unchecked, 7.15ms Time], IncrementalHoareTripleChecker [41 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 648.37ms Time] [2021-11-12 23:04:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35181 states. [2021-11-12 23:04:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35181 to 25457. [2021-11-12 23:04:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25457 states, 25456 states have (on average 1.2341687617850408) internal successors, (31417), 25456 states have internal predecessors, (31417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25457 states to 25457 states and 31417 transitions. [2021-11-12 23:04:47,145 INFO L78 Accepts]: Start accepts. Automaton has 25457 states and 31417 transitions. Word has length 278 [2021-11-12 23:04:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:47,146 INFO L470 AbstractCegarLoop]: Abstraction has 25457 states and 31417 transitions. [2021-11-12 23:04:47,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 25457 states and 31417 transitions. [2021-11-12 23:04:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-12 23:04:47,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:47,177 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:47,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:47,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:47,402 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:47,403 INFO L85 PathProgramCache]: Analyzing trace with hash 598054814, now seen corresponding path program 1 times [2021-11-12 23:04:47,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:47,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649984741] [2021-11-12 23:04:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:47,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:04:47,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:47,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649984741] [2021-11-12 23:04:47,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649984741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:47,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:47,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:04:47,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736354189] [2021-11-12 23:04:47,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:47,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:47,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:47,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:47,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:47,589 INFO L87 Difference]: Start difference. First operand 25457 states and 31417 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:48,446 INFO L93 Difference]: Finished difference Result 53630 states and 66300 transitions. [2021-11-12 23:04:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:48,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 290 [2021-11-12 23:04:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:48,479 INFO L225 Difference]: With dead ends: 53630 [2021-11-12 23:04:48,479 INFO L226 Difference]: Without dead ends: 28746 [2021-11-12 23:04:48,496 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 [2021-11-12 23:04:48,497 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 156 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 543.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.54ms SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 656.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:48,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 188 Invalid, 577 Unknown, 0 Unchecked, 4.54ms Time], IncrementalHoareTripleChecker [172 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 656.31ms Time] [2021-11-12 23:04:48,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28746 states. [2021-11-12 23:04:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28746 to 26601. [2021-11-12 23:04:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26601 states, 26600 states have (on average 1.2352631578947368) internal successors, (32858), 26600 states have internal predecessors, (32858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26601 states to 26601 states and 32858 transitions. [2021-11-12 23:04:49,049 INFO L78 Accepts]: Start accepts. Automaton has 26601 states and 32858 transitions. Word has length 290 [2021-11-12 23:04:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:49,049 INFO L470 AbstractCegarLoop]: Abstraction has 26601 states and 32858 transitions. [2021-11-12 23:04:49,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 26601 states and 32858 transitions. [2021-11-12 23:04:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-12 23:04:49,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:49,072 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:49,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 23:04:49,072 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:49,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:49,073 INFO L85 PathProgramCache]: Analyzing trace with hash -545387728, now seen corresponding path program 1 times [2021-11-12 23:04:49,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:49,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876250819] [2021-11-12 23:04:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:49,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 148 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:04:49,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:49,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876250819] [2021-11-12 23:04:49,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876250819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:49,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504485045] [2021-11-12 23:04:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:49,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:49,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:49,254 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:49,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:04:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:49,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:04:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:04:50,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:04:52,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504485045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:52,240 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:52,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 4 [2021-11-12 23:04:52,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478320144] [2021-11-12 23:04:52,241 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:52,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:04:52,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:04:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:52,243 INFO L87 Difference]: Start difference. First operand 26601 states and 32858 transitions. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:53,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:53,168 INFO L93 Difference]: Finished difference Result 76512 states and 94330 transitions. [2021-11-12 23:04:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:04:53,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 292 [2021-11-12 23:04:53,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:53,222 INFO L225 Difference]: With dead ends: 76512 [2021-11-12 23:04:53,223 INFO L226 Difference]: Without dead ends: 50484 [2021-11-12 23:04:53,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:53,240 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 552 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 589.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.01ms SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 697.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:53,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 8 Invalid, 629 Unknown, 0 Unchecked, 4.01ms Time], IncrementalHoareTripleChecker [103 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 697.79ms Time] [2021-11-12 23:04:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50484 states. [2021-11-12 23:04:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50484 to 50482. [2021-11-12 23:04:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50482 states, 50481 states have (on average 1.2286800974624117) internal successors, (62025), 50481 states have internal predecessors, (62025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50482 states to 50482 states and 62025 transitions. [2021-11-12 23:04:53,999 INFO L78 Accepts]: Start accepts. Automaton has 50482 states and 62025 transitions. Word has length 292 [2021-11-12 23:04:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:53,999 INFO L470 AbstractCegarLoop]: Abstraction has 50482 states and 62025 transitions. [2021-11-12 23:04:53,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 50482 states and 62025 transitions. [2021-11-12 23:04:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-12 23:04:54,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:54,071 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:54,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:54,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-12 23:04:54,298 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:54,299 INFO L85 PathProgramCache]: Analyzing trace with hash -394605667, now seen corresponding path program 1 times [2021-11-12 23:04:54,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:54,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922911584] [2021-11-12 23:04:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:54,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 88 proven. 6 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-12 23:04:54,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:54,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922911584] [2021-11-12 23:04:54,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922911584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:54,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859465784] [2021-11-12 23:04:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:54,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:54,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:54,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:54,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:04:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:54,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:04:54,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-12 23:04:55,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-12 23:04:56,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859465784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:56,091 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:56,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-11-12 23:04:56,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191819346] [2021-11-12 23:04:56,091 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:56,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:56,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:04:56,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:56,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:56,093 INFO L87 Difference]: Start difference. First operand 50482 states and 62025 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 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) [2021-11-12 23:04:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:56,906 INFO L93 Difference]: Finished difference Result 146582 states and 180030 transitions. [2021-11-12 23:04:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:56,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 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) Word has length 316 [2021-11-12 23:04:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:57,009 INFO L225 Difference]: With dead ends: 146582 [2021-11-12 23:04:57,009 INFO L226 Difference]: Without dead ends: 96673 [2021-11-12 23:04:57,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 629 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:57,035 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 125 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.03ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 248.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:57,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 366 Invalid, 186 Unknown, 0 Unchecked, 2.03ms Time], IncrementalHoareTripleChecker [25 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 248.04ms Time] [2021-11-12 23:04:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96673 states. [2021-11-12 23:04:58,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96673 to 96671. [2021-11-12 23:04:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96671 states, 96670 states have (on average 1.2258404882590255) internal successors, (118502), 96670 states have internal predecessors, (118502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:04:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96671 states to 96671 states and 118502 transitions. [2021-11-12 23:04:58,826 INFO L78 Accepts]: Start accepts. Automaton has 96671 states and 118502 transitions. Word has length 316 [2021-11-12 23:04:58,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:58,827 INFO L470 AbstractCegarLoop]: Abstraction has 96671 states and 118502 transitions. [2021-11-12 23:04:58,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 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) [2021-11-12 23:04:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 96671 states and 118502 transitions. [2021-11-12 23:04:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-12 23:04:58,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:58,898 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:58,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:59,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-12 23:04:59,100 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2040125810, now seen corresponding path program 1 times [2021-11-12 23:04:59,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:04:59,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541900214] [2021-11-12 23:04:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:59,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:04:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-12 23:04:59,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:04:59,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541900214] [2021-11-12 23:04:59,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541900214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:59,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086277461] [2021-11-12 23:04:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:59,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:59,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:59,237 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:59,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 23:04:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:04:59,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 23:05:00,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 23:05:00,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086277461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:00,836 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:05:00,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2021-11-12 23:05:00,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79968214] [2021-11-12 23:05:00,837 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:00,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:05:00,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:05:00,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:05:00,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:05:00,838 INFO L87 Difference]: Start difference. First operand 96671 states and 118502 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 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) [2021-11-12 23:05:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:02,381 INFO L93 Difference]: Finished difference Result 242247 states and 295718 transitions. [2021-11-12 23:05:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:05:02,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 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) Word has length 321 [2021-11-12 23:05:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:02,571 INFO L225 Difference]: With dead ends: 242247 [2021-11-12 23:05:02,571 INFO L226 Difference]: Without dead ends: 146149 [2021-11-12 23:05:02,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 639 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:05:02,611 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 448.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.47ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 565.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:02,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 75 Invalid, 549 Unknown, 0 Unchecked, 2.47ms Time], IncrementalHoareTripleChecker [69 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 565.23ms Time] [2021-11-12 23:05:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146149 states. [2021-11-12 23:05:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146149 to 140429. [2021-11-12 23:05:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140429 states, 140428 states have (on average 1.1949682399521464) internal successors, (167807), 140428 states have internal predecessors, (167807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140429 states to 140429 states and 167807 transitions. [2021-11-12 23:05:05,382 INFO L78 Accepts]: Start accepts. Automaton has 140429 states and 167807 transitions. Word has length 321 [2021-11-12 23:05:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:05,383 INFO L470 AbstractCegarLoop]: Abstraction has 140429 states and 167807 transitions. [2021-11-12 23:05:05,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 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) [2021-11-12 23:05:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 140429 states and 167807 transitions. [2021-11-12 23:05:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-12 23:05:05,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:05,466 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:05:05,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:05,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-12 23:05:05,670 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:05,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:05,671 INFO L85 PathProgramCache]: Analyzing trace with hash 386778196, now seen corresponding path program 1 times [2021-11-12 23:05:05,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:05:05,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543914054] [2021-11-12 23:05:05,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:05,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:05:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-12 23:05:05,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:05:05,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543914054] [2021-11-12 23:05:05,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543914054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:05,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:05:05,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:05:05,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683521654] [2021-11-12 23:05:05,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:05,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:05:05,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:05:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:05:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:05:05,804 INFO L87 Difference]: Start difference. First operand 140429 states and 167807 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 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) [2021-11-12 23:05:09,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:09,567 INFO L93 Difference]: Finished difference Result 498936 states and 594727 transitions. [2021-11-12 23:05:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:05:09,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 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) Word has length 364 [2021-11-12 23:05:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:10,111 INFO L225 Difference]: With dead ends: 498936 [2021-11-12 23:05:10,111 INFO L226 Difference]: Without dead ends: 359080 [2021-11-12 23:05:10,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:05:10,211 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 395 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1214.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.67ms SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1444.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:10,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 20 Invalid, 1088 Unknown, 0 Unchecked, 4.67ms Time], IncrementalHoareTripleChecker [124 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1444.70ms Time] [2021-11-12 23:05:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359080 states. [2021-11-12 23:05:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359080 to 359076. [2021-11-12 23:05:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359076 states, 359075 states have (on average 1.1871447469191674) internal successors, (426274), 359075 states have internal predecessors, (426274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359076 states to 359076 states and 426274 transitions. [2021-11-12 23:05:17,241 INFO L78 Accepts]: Start accepts. Automaton has 359076 states and 426274 transitions. Word has length 364 [2021-11-12 23:05:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:17,241 INFO L470 AbstractCegarLoop]: Abstraction has 359076 states and 426274 transitions. [2021-11-12 23:05:17,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 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) [2021-11-12 23:05:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 359076 states and 426274 transitions. [2021-11-12 23:05:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-11-12 23:05:17,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:17,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:05:17,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 23:05:17,320 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:17,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1875145916, now seen corresponding path program 1 times [2021-11-12 23:05:17,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:05:17,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761628198] [2021-11-12 23:05:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:17,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:05:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 60 proven. 130 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-12 23:05:18,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:05:18,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761628198] [2021-11-12 23:05:18,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761628198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:05:18,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637852736] [2021-11-12 23:05:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:18,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:18,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:18,632 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:05:18,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62252e9d-6fe8-4c1e-bbcb-e03be9bdf442/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 23:05:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:18,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:05:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-12 23:05:19,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-12 23:05:20,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637852736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:20,629 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:05:20,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2021-11-12 23:05:20,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918840096] [2021-11-12 23:05:20,630 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:20,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:05:20,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:05:20,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:05:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:05:20,631 INFO L87 Difference]: Start difference. First operand 359076 states and 426274 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:05:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:24,504 INFO L93 Difference]: Finished difference Result 743319 states and 885366 transitions. [2021-11-12 23:05:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:05:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 370 [2021-11-12 23:05:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:25,212 INFO L225 Difference]: With dead ends: 743319 [2021-11-12 23:05:25,212 INFO L226 Difference]: Without dead ends: 384816 [2021-11-12 23:05:25,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 738 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:05:25,410 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 487.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.32ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 619.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:25,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 194 Invalid, 552 Unknown, 0 Unchecked, 3.32ms Time], IncrementalHoareTripleChecker [57 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 619.88ms Time] [2021-11-12 23:05:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384816 states.