./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba --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 5c7b2e547f39f7d53d20335ecc1b1fbde6acdc52384cb52caa86017352bf317a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:07:24,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:07:24,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:07:24,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:07:24,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:07:24,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:07:24,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:07:24,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:07:24,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:07:24,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:07:24,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:07:24,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:07:24,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:07:24,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:07:24,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:07:24,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:07:24,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:07:24,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:07:24,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:07:24,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:07:24,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:07:24,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:07:24,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:07:24,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:07:24,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:07:24,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:07:24,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:07:24,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:07:24,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:07:24,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:07:24,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:07:24,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:07:24,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:07:24,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:07:24,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:07:24,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:07:24,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:07:24,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:07:24,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:07:24,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:07:24,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:07:24,715 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:07:24,756 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:07:24,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:07:24,757 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:07:24,757 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:07:24,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:07:24,764 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:07:24,764 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:07:24,764 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:07:24,764 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:07:24,764 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:07:24,766 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:07:24,766 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:07:24,766 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:07:24,766 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:07:24,767 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:07:24,767 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:07:24,767 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:07:24,767 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:07:24,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:07:24,769 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:07:24,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:07:24,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:07:24,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:07:24,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:07:24,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:07:24,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:07:24,771 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:07:24,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:07:24,772 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:07:24,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:07:24,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:07:24,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:07:24,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:07:24,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:07:24,773 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:07:24,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:07:24,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:07:24,774 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:07:24,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:07:24,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:07:24,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:07:24,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c7b2e547f39f7d53d20335ecc1b1fbde6acdc52384cb52caa86017352bf317a [2022-11-22 02:07:25,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:07:25,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:07:25,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:07:25,114 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:07:25,114 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:07:25,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-22 02:07:28,231 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:07:28,509 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:07:28,510 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-22 02:07:28,520 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/data/451d915c5/3666653ef0204ce19b980a1cfd7aae8e/FLAG01cf0f373 [2022-11-22 02:07:28,536 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/data/451d915c5/3666653ef0204ce19b980a1cfd7aae8e [2022-11-22 02:07:28,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:07:28,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:07:28,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:07:28,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:07:28,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:07:28,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:07:28" (1/1) ... [2022-11-22 02:07:28,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@751ad25c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:28, skipping insertion in model container [2022-11-22 02:07:28,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:07:28" (1/1) ... [2022-11-22 02:07:28,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:07:28,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:07:28,856 WARN L237 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_e13c11ad-a4bb-487a-a708-637a7e7714fc/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7834,7847] [2022-11-22 02:07:28,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:07:28,957 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:07:29,022 WARN L237 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_e13c11ad-a4bb-487a-a708-637a7e7714fc/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7834,7847] [2022-11-22 02:07:29,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:07:29,074 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:07:29,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29 WrapperNode [2022-11-22 02:07:29,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:07:29,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:07:29,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:07:29,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:07:29,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,136 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 616 [2022-11-22 02:07:29,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:07:29,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:07:29,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:07:29,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:07:29,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,170 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:07:29,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:07:29,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:07:29,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:07:29,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (1/1) ... [2022-11-22 02:07:29,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:07:29,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:07:29,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:07:29,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:07:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:07:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:07:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:07:29,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:07:29,446 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:07:29,448 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:07:30,287 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:07:30,516 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:07:30,517 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 02:07:30,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:07:30 BoogieIcfgContainer [2022-11-22 02:07:30,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:07:30,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:07:30,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:07:30,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:07:30,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:07:28" (1/3) ... [2022-11-22 02:07:30,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bae32f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:07:30, skipping insertion in model container [2022-11-22 02:07:30,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:07:29" (2/3) ... [2022-11-22 02:07:30,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bae32f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:07:30, skipping insertion in model container [2022-11-22 02:07:30,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:07:30" (3/3) ... [2022-11-22 02:07:30,536 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-11-22 02:07:30,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:07:30,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:07:30,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:07:30,645 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6bd2ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:07:30,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:07:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 102 states have (on average 1.7647058823529411) internal successors, (180), 103 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 02:07:30,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:30,666 INFO L195 NwaCegarLoop]: 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] [2022-11-22 02:07:30,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:30,675 INFO L85 PathProgramCache]: Analyzing trace with hash -853769130, now seen corresponding path program 1 times [2022-11-22 02:07:30,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:30,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687607898] [2022-11-22 02:07:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:31,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:31,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687607898] [2022-11-22 02:07:31,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687607898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:31,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:31,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:07:31,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671842321] [2022-11-22 02:07:31,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:31,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:07:31,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:31,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:07:31,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:07:31,495 INFO L87 Difference]: Start difference. First operand has 104 states, 102 states have (on average 1.7647058823529411) internal successors, (180), 103 states have internal predecessors, (180), 0 states have call successors, (0), 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 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:31,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:31,698 INFO L93 Difference]: Finished difference Result 176 states and 291 transitions. [2022-11-22 02:07:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:31,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-11-22 02:07:31,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:31,711 INFO L225 Difference]: With dead ends: 176 [2022-11-22 02:07:31,711 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 02:07:31,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:31,718 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 483 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:31,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 111 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:07:31,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 02:07:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 02:07:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2022-11-22 02:07:31,784 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 64 [2022-11-22 02:07:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:31,785 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2022-11-22 02:07:31,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2022-11-22 02:07:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 02:07:31,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:31,787 INFO L195 NwaCegarLoop]: 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] [2022-11-22 02:07:31,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:07:31,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1847172465, now seen corresponding path program 1 times [2022-11-22 02:07:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:31,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163142889] [2022-11-22 02:07:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:32,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:32,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163142889] [2022-11-22 02:07:32,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163142889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:32,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:32,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:07:32,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227958815] [2022-11-22 02:07:32,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:32,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:07:32,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:32,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:07:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:07:32,033 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:32,225 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-11-22 02:07:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:32,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2022-11-22 02:07:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:32,229 INFO L225 Difference]: With dead ends: 152 [2022-11-22 02:07:32,229 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 02:07:32,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:32,237 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 276 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:32,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 96 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:07:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 02:07:32,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 02:07:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.198019801980198) internal successors, (121), 101 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2022-11-22 02:07:32,267 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 65 [2022-11-22 02:07:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:32,269 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2022-11-22 02:07:32,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2022-11-22 02:07:32,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 02:07:32,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:32,273 INFO L195 NwaCegarLoop]: 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] [2022-11-22 02:07:32,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:07:32,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:32,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:32,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1316074358, now seen corresponding path program 1 times [2022-11-22 02:07:32,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:32,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529996913] [2022-11-22 02:07:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:32,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:32,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:32,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529996913] [2022-11-22 02:07:32,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529996913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:32,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:32,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:07:32,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203247251] [2022-11-22 02:07:32,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:32,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:07:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:32,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:07:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:07:32,514 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:32,650 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-11-22 02:07:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-22 02:07:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:32,656 INFO L225 Difference]: With dead ends: 160 [2022-11-22 02:07:32,656 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 02:07:32,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:32,665 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 292 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:32,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 80 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:07:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 02:07:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 02:07:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-11-22 02:07:32,685 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 66 [2022-11-22 02:07:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:32,687 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-11-22 02:07:32,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-11-22 02:07:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 02:07:32,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:32,696 INFO L195 NwaCegarLoop]: 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] [2022-11-22 02:07:32,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:07:32,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:32,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:32,698 INFO L85 PathProgramCache]: Analyzing trace with hash 990643055, now seen corresponding path program 1 times [2022-11-22 02:07:32,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:32,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610638935] [2022-11-22 02:07:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:32,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:32,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:32,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610638935] [2022-11-22 02:07:32,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610638935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:32,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:32,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:07:32,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241299431] [2022-11-22 02:07:32,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:32,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:07:32,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:07:32,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:07:32,930 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:33,048 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2022-11-22 02:07:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-11-22 02:07:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:33,050 INFO L225 Difference]: With dead ends: 156 [2022-11-22 02:07:33,050 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 02:07:33,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:33,052 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 274 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:33,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 88 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:07:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 02:07:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 02:07:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2022-11-22 02:07:33,067 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 67 [2022-11-22 02:07:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:33,068 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2022-11-22 02:07:33,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2022-11-22 02:07:33,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 02:07:33,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:33,069 INFO L195 NwaCegarLoop]: 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] [2022-11-22 02:07:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:07:33,070 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1627175134, now seen corresponding path program 1 times [2022-11-22 02:07:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:33,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156775954] [2022-11-22 02:07:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:33,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:33,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:33,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156775954] [2022-11-22 02:07:33,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156775954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:33,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:33,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:07:33,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881025800] [2022-11-22 02:07:33,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:33,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:07:33,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:07:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:07:33,196 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:33,309 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2022-11-22 02:07:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:07:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-22 02:07:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:33,311 INFO L225 Difference]: With dead ends: 164 [2022-11-22 02:07:33,311 INFO L226 Difference]: Without dead ends: 102 [2022-11-22 02:07:33,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:07:33,313 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 291 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:33,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 72 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:07:33,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-22 02:07:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-22 02:07:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-11-22 02:07:33,330 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 68 [2022-11-22 02:07:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:33,330 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-11-22 02:07:33,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-11-22 02:07:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-22 02:07:33,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:33,332 INFO L195 NwaCegarLoop]: 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] [2022-11-22 02:07:33,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:07:33,332 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1174071911, now seen corresponding path program 1 times [2022-11-22 02:07:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126568148] [2022-11-22 02:07:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:33,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:07:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:07:42,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:07:42,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126568148] [2022-11-22 02:07:42,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126568148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:07:42,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:07:42,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-11-22 02:07:42,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894354973] [2022-11-22 02:07:42,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:07:42,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 02:07:42,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:07:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 02:07:42,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:07:42,835 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:07:52,159 INFO L93 Difference]: Finished difference Result 175 states and 212 transitions. [2022-11-22 02:07:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-22 02:07:52,160 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2022-11-22 02:07:52,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:07:52,161 INFO L225 Difference]: With dead ends: 175 [2022-11-22 02:07:52,161 INFO L226 Difference]: Without dead ends: 137 [2022-11-22 02:07:52,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=722, Invalid=2358, Unknown=0, NotChecked=0, Total=3080 [2022-11-22 02:07:52,163 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 604 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:07:52,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 595 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-22 02:07:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-22 02:07:52,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-11-22 02:07:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 134 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2022-11-22 02:07:52,207 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 69 [2022-11-22 02:07:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:07:52,208 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2022-11-22 02:07:52,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:07:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2022-11-22 02:07:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 02:07:52,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:07:52,212 INFO L195 NwaCegarLoop]: 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] [2022-11-22 02:07:52,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:07:52,213 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:07:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:07:52,213 INFO L85 PathProgramCache]: Analyzing trace with hash 971361958, now seen corresponding path program 1 times [2022-11-22 02:07:52,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:07:52,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286258489] [2022-11-22 02:07:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:07:52,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:07:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:03,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:08:03,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286258489] [2022-11-22 02:08:03,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286258489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:08:03,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:08:03,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-11-22 02:08:03,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615826316] [2022-11-22 02:08:03,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:08:03,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 02:08:03,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:08:03,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 02:08:03,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:08:03,666 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:17,692 INFO L93 Difference]: Finished difference Result 244 states and 304 transitions. [2022-11-22 02:08:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-22 02:08:17,693 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-22 02:08:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:17,695 INFO L225 Difference]: With dead ends: 244 [2022-11-22 02:08:17,696 INFO L226 Difference]: Without dead ends: 173 [2022-11-22 02:08:17,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1087, Invalid=3335, Unknown=0, NotChecked=0, Total=4422 [2022-11-22 02:08:17,699 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 700 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:17,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 699 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 02:08:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-22 02:08:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-11-22 02:08:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2176470588235293) internal successors, (207), 170 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 207 transitions. [2022-11-22 02:08:17,747 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 207 transitions. Word has length 71 [2022-11-22 02:08:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:17,748 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 207 transitions. [2022-11-22 02:08:17,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 207 transitions. [2022-11-22 02:08:17,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 02:08:17,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:17,749 INFO L195 NwaCegarLoop]: 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] [2022-11-22 02:08:17,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:08:17,749 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:08:17,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash 775009477, now seen corresponding path program 1 times [2022-11-22 02:08:17,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:08:17,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395931149] [2022-11-22 02:08:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:17,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:08:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:17,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:08:17,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395931149] [2022-11-22 02:08:17,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395931149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:08:17,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:08:17,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:08:17,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267765974] [2022-11-22 02:08:17,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:08:17,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:08:17,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:08:17,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:08:17,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:08:17,945 INFO L87 Difference]: Start difference. First operand 171 states and 207 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:18,048 INFO L93 Difference]: Finished difference Result 384 states and 492 transitions. [2022-11-22 02:08:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:08:18,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-11-22 02:08:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:18,052 INFO L225 Difference]: With dead ends: 384 [2022-11-22 02:08:18,052 INFO L226 Difference]: Without dead ends: 277 [2022-11-22 02:08:18,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:08:18,055 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 47 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:18,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 301 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:08:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-22 02:08:18,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2022-11-22 02:08:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.2627737226277371) internal successors, (346), 274 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 346 transitions. [2022-11-22 02:08:18,116 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 346 transitions. Word has length 71 [2022-11-22 02:08:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:18,116 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 346 transitions. [2022-11-22 02:08:18,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 346 transitions. [2022-11-22 02:08:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 02:08:18,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:18,117 INFO L195 NwaCegarLoop]: 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] [2022-11-22 02:08:18,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:08:18,118 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:08:18,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:18,119 INFO L85 PathProgramCache]: Analyzing trace with hash 57039674, now seen corresponding path program 1 times [2022-11-22 02:08:18,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:08:18,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175592720] [2022-11-22 02:08:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:18,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:08:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:18,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:08:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175592720] [2022-11-22 02:08:18,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175592720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:08:18,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:08:18,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:08:18,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925328360] [2022-11-22 02:08:18,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:08:18,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:08:18,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:08:18,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:08:18,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:08:18,371 INFO L87 Difference]: Start difference. First operand 275 states and 346 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:18,655 INFO L93 Difference]: Finished difference Result 537 states and 694 transitions. [2022-11-22 02:08:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:08:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-22 02:08:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:18,660 INFO L225 Difference]: With dead ends: 537 [2022-11-22 02:08:18,660 INFO L226 Difference]: Without dead ends: 430 [2022-11-22 02:08:18,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:08:18,663 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 238 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:18,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 588 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:08:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-11-22 02:08:18,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 238. [2022-11-22 02:08:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.2447257383966244) internal successors, (295), 237 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 295 transitions. [2022-11-22 02:08:18,729 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 295 transitions. Word has length 72 [2022-11-22 02:08:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:18,730 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 295 transitions. [2022-11-22 02:08:18,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 295 transitions. [2022-11-22 02:08:18,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-22 02:08:18,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:18,731 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:08:18,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:08:18,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:08:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash 353118257, now seen corresponding path program 1 times [2022-11-22 02:08:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:08:18,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856730419] [2022-11-22 02:08:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:08:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:18,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:08:18,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856730419] [2022-11-22 02:08:18,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856730419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:08:18,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:08:18,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:08:18,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570463729] [2022-11-22 02:08:18,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:08:18,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:08:18,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:08:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:08:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:08:18,881 INFO L87 Difference]: Start difference. First operand 238 states and 295 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:18,997 INFO L93 Difference]: Finished difference Result 476 states and 611 transitions. [2022-11-22 02:08:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:08:19,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2022-11-22 02:08:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:19,003 INFO L225 Difference]: With dead ends: 476 [2022-11-22 02:08:19,004 INFO L226 Difference]: Without dead ends: 302 [2022-11-22 02:08:19,004 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:08:19,005 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 42 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:19,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 231 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:08:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-22 02:08:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 284. [2022-11-22 02:08:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.254416961130742) internal successors, (355), 283 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 355 transitions. [2022-11-22 02:08:19,080 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 355 transitions. Word has length 85 [2022-11-22 02:08:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:19,080 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 355 transitions. [2022-11-22 02:08:19,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 355 transitions. [2022-11-22 02:08:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 02:08:19,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:19,081 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:08:19,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 02:08:19,082 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:08:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:19,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1241787828, now seen corresponding path program 1 times [2022-11-22 02:08:19,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:08:19,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269918073] [2022-11-22 02:08:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:19,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:08:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:19,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:08:19,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269918073] [2022-11-22 02:08:19,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269918073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:08:19,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:08:19,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:08:19,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284667704] [2022-11-22 02:08:19,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:08:19,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:08:19,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:08:19,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:08:19,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:08:19,239 INFO L87 Difference]: Start difference. First operand 284 states and 355 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:19,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:19,394 INFO L93 Difference]: Finished difference Result 654 states and 849 transitions. [2022-11-22 02:08:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:08:19,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2022-11-22 02:08:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:19,398 INFO L225 Difference]: With dead ends: 654 [2022-11-22 02:08:19,398 INFO L226 Difference]: Without dead ends: 438 [2022-11-22 02:08:19,399 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:08:19,399 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 37 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:19,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 225 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:08:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-22 02:08:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 412. [2022-11-22 02:08:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.2773722627737227) internal successors, (525), 411 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 525 transitions. [2022-11-22 02:08:19,508 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 525 transitions. Word has length 88 [2022-11-22 02:08:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:19,509 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 525 transitions. [2022-11-22 02:08:19,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:19,509 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 525 transitions. [2022-11-22 02:08:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 02:08:19,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:19,512 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:08:19,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:08:19,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:08:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash 80899168, now seen corresponding path program 1 times [2022-11-22 02:08:19,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:08:19,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307570757] [2022-11-22 02:08:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:19,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:08:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:19,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:08:19,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307570757] [2022-11-22 02:08:19,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307570757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:08:19,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:08:19,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:08:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927120951] [2022-11-22 02:08:19,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:08:19,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:08:19,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:08:19,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:08:19,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:08:19,656 INFO L87 Difference]: Start difference. First operand 412 states and 525 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:19,897 INFO L93 Difference]: Finished difference Result 1056 states and 1383 transitions. [2022-11-22 02:08:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:08:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-22 02:08:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:19,901 INFO L225 Difference]: With dead ends: 1056 [2022-11-22 02:08:19,901 INFO L226 Difference]: Without dead ends: 712 [2022-11-22 02:08:19,902 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:08:19,903 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 32 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:19,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 218 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:08:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-11-22 02:08:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 674. [2022-11-22 02:08:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 1.2942050520059436) internal successors, (871), 673 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 871 transitions. [2022-11-22 02:08:20,090 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 871 transitions. Word has length 91 [2022-11-22 02:08:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:20,091 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 871 transitions. [2022-11-22 02:08:20,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 871 transitions. [2022-11-22 02:08:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 02:08:20,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:20,094 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:08:20,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:08:20,095 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:08:20,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:20,095 INFO L85 PathProgramCache]: Analyzing trace with hash -356018612, now seen corresponding path program 1 times [2022-11-22 02:08:20,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:08:20,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143641384] [2022-11-22 02:08:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:20,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:08:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:20,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:08:20,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143641384] [2022-11-22 02:08:20,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143641384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:08:20,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:08:20,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:08:20,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584099462] [2022-11-22 02:08:20,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:08:20,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:08:20,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:08:20,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:08:20,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:08:20,248 INFO L87 Difference]: Start difference. First operand 674 states and 871 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:20,603 INFO L93 Difference]: Finished difference Result 1860 states and 2445 transitions. [2022-11-22 02:08:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:08:20,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-22 02:08:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:20,609 INFO L225 Difference]: With dead ends: 1860 [2022-11-22 02:08:20,609 INFO L226 Difference]: Without dead ends: 1254 [2022-11-22 02:08:20,611 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:08:20,612 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 27 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:20,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 211 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:08:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-11-22 02:08:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1192. [2022-11-22 02:08:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 1.3022670025188916) internal successors, (1551), 1191 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1551 transitions. [2022-11-22 02:08:20,941 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1551 transitions. Word has length 94 [2022-11-22 02:08:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:20,941 INFO L495 AbstractCegarLoop]: Abstraction has 1192 states and 1551 transitions. [2022-11-22 02:08:20,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1551 transitions. [2022-11-22 02:08:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-22 02:08:20,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:20,943 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:08:20,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:08:20,943 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:08:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1971522173, now seen corresponding path program 1 times [2022-11-22 02:08:20,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:08:20,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613286305] [2022-11-22 02:08:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:08:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:08:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:08:21,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:08:21,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613286305] [2022-11-22 02:08:21,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613286305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:08:21,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:08:21,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:08:21,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998168277] [2022-11-22 02:08:21,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:08:21,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:08:21,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:08:21,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:08:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:08:21,088 INFO L87 Difference]: Start difference. First operand 1192 states and 1551 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:08:21,750 INFO L93 Difference]: Finished difference Result 3432 states and 4509 transitions. [2022-11-22 02:08:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:08:21,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2022-11-22 02:08:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:08:21,760 INFO L225 Difference]: With dead ends: 3432 [2022-11-22 02:08:21,760 INFO L226 Difference]: Without dead ends: 2308 [2022-11-22 02:08:21,762 INFO L412 NwaCegarLoop]: 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 [2022-11-22 02:08:21,763 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 22 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:08:21,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 200 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:08:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-11-22 02:08:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2198. [2022-11-22 02:08:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 1.3031406463359125) internal successors, (2863), 2197 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 2863 transitions. [2022-11-22 02:08:22,388 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 2863 transitions. Word has length 97 [2022-11-22 02:08:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:08:22,389 INFO L495 AbstractCegarLoop]: Abstraction has 2198 states and 2863 transitions. [2022-11-22 02:08:22,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:08:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 2863 transitions. [2022-11-22 02:08:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-22 02:08:22,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:08:22,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 02:08:22,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 02:08:22,391 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:08:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:08:22,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1949386391, now seen corresponding path program 1 times [2022-11-22 02:08:22,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:08:22,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381928661] [2022-11-22 02:08:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:08:22,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:08:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:10:34,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:10:34,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381928661] [2022-11-22 02:10:34,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381928661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:10:34,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246811921] [2022-11-22 02:10:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:10:34,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:10:34,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:10:34,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:10:34,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13c11ad-a4bb-487a-a708-637a7e7714fc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:10:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:10:34,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-22 02:10:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:05,634 WARN L233 SmtUtils]: Spent 27.97s on a formula simplification. DAG size of input: 309 DAG size of output: 293 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:15:03,225 WARN L233 SmtUtils]: Spent 25.22s on a formula simplification. DAG size of input: 8345 DAG size of output: 5193 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)