./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW --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 e88e261bdd8209c6645351b9246697a266f2a89be3660180d29cb5cfb2f2528f --- 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-4e7fbc6 [2022-11-23 14:35:49,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:35:49,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:35:49,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:35:49,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:35:49,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:35:49,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:35:49,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:35:49,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:35:49,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:35:49,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:35:49,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:35:49,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:35:49,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:35:49,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:35:49,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:35:49,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:35:49,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:35:49,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:35:49,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:35:49,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:35:49,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:35:49,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:35:49,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:35:49,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:35:49,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:35:49,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:35:49,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:35:49,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:35:49,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:35:49,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:35:49,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:35:49,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:35:49,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:35:49,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:35:49,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:35:49,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:35:49,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:35:49,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:35:49,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:35:49,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:35:49,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:35:49,940 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:35:49,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:35:49,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:35:49,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:35:49,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:35:49,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:35:49,943 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:35:49,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:35:49,943 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:35:49,943 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:35:49,944 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:35:49,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:35:49,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:35:49,945 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:35:49,945 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:35:49,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:35:49,946 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:35:49,946 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:35:49,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:35:49,947 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:35:49,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:35:49,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:35:49,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:35:49,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:35:49,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:35:49,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:35:49,948 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:35:49,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:35:49,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:35:49,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:35:49,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:35:49,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:35:49,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:35:49,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:35:49,951 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:35:49,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:35:49,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:35:49,951 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:35:49,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:35:49,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:35:49,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:35:49,953 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_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e88e261bdd8209c6645351b9246697a266f2a89be3660180d29cb5cfb2f2528f [2022-11-23 14:35:50,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:35:50,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:35:50,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:35:50,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:35:50,237 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:35:50,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2022-11-23 14:35:53,252 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:35:53,635 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:35:53,639 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2022-11-23 14:35:53,657 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/data/1e0d5291a/1ed6a59cee1047239c6103ce6d291872/FLAG60d8c2f49 [2022-11-23 14:35:53,681 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/data/1e0d5291a/1ed6a59cee1047239c6103ce6d291872 [2022-11-23 14:35:53,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:35:53,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:35:53,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:35:53,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:35:53,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:35:53,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:53" (1/1) ... [2022-11-23 14:35:53,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5304feba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:53, skipping insertion in model container [2022-11-23 14:35:53,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:53" (1/1) ... [2022-11-23 14:35:53,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:35:53,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:35:54,250 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_0443a594-baca-48cb-a38f-13d91b8ba36e/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[22673,22686] [2022-11-23 14:35:54,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:35:54,416 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:35:54,550 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_0443a594-baca-48cb-a38f-13d91b8ba36e/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[22673,22686] [2022-11-23 14:35:54,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:35:54,729 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:35:54,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54 WrapperNode [2022-11-23 14:35:54,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:35:54,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:35:54,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:35:54,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:35:54,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:54,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:54,881 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2818 [2022-11-23 14:35:54,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:35:54,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:35:54,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:35:54,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:35:54,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:54,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:54,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:54,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:54,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:54,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:54,994 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:55,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:55,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:35:55,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:35:55,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:35:55,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:35:55,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (1/1) ... [2022-11-23 14:35:55,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:35:55,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:55,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:35:55,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0443a594-baca-48cb-a38f-13d91b8ba36e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:35:55,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:35:55,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:35:55,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:35:55,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:35:55,363 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:35:55,367 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:35:57,265 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:35:58,011 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:35:58,012 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:35:58,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:58 BoogieIcfgContainer [2022-11-23 14:35:58,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:35:58,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:35:58,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:35:58,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:35:58,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:35:53" (1/3) ... [2022-11-23 14:35:58,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c0a216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:58, skipping insertion in model container [2022-11-23 14:35:58,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:54" (2/3) ... [2022-11-23 14:35:58,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c0a216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:58, skipping insertion in model container [2022-11-23 14:35:58,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:58" (3/3) ... [2022-11-23 14:35:58,039 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2022-11-23 14:35:58,057 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:35:58,057 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:35:58,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:35:58,145 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;@2764fda0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:35:58,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:35:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 627 states, 625 states have (on average 1.7216) internal successors, (1076), 626 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-23 14:35:58,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:58,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:58,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:58,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:58,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1593447106, now seen corresponding path program 1 times [2022-11-23 14:35:58,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:58,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201905070] [2022-11-23 14:35:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:58,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:59,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:59,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201905070] [2022-11-23 14:35:59,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201905070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:59,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:59,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:35:59,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570434264] [2022-11-23 14:35:59,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:59,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:59,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:59,155 INFO L87 Difference]: Start difference. First operand has 627 states, 625 states have (on average 1.7216) internal successors, (1076), 626 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:59,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:59,541 INFO L93 Difference]: Finished difference Result 921 states and 1559 transitions. [2022-11-23 14:35:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:59,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-23 14:35:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:59,559 INFO L225 Difference]: With dead ends: 921 [2022-11-23 14:35:59,559 INFO L226 Difference]: Without dead ends: 757 [2022-11-23 14:35:59,563 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 [2022-11-23 14:35:59,566 INFO L413 NwaCegarLoop]: 1215 mSDtfsCounter, 269 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:59,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 2156 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:35:59,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-11-23 14:35:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 755. [2022-11-23 14:35:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 1.6472148541114058) internal successors, (1242), 754 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1242 transitions. [2022-11-23 14:35:59,729 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1242 transitions. Word has length 182 [2022-11-23 14:35:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:59,732 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1242 transitions. [2022-11-23 14:35:59,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1242 transitions. [2022-11-23 14:35:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-23 14:35:59,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:59,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:59,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:35:59,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash -891927037, now seen corresponding path program 1 times [2022-11-23 14:35:59,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:59,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346088859] [2022-11-23 14:35:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:59,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:00,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:00,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346088859] [2022-11-23 14:36:00,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346088859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:00,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:00,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:00,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78690068] [2022-11-23 14:36:00,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:00,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:36:00,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:00,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:36:00,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:36:00,081 INFO L87 Difference]: Start difference. First operand 755 states and 1242 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:00,318 INFO L93 Difference]: Finished difference Result 1202 states and 1977 transitions. [2022-11-23 14:36:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 184 [2022-11-23 14:36:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:00,329 INFO L225 Difference]: With dead ends: 1202 [2022-11-23 14:36:00,329 INFO L226 Difference]: Without dead ends: 914 [2022-11-23 14:36:00,338 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 [2022-11-23 14:36:00,340 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 251 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:00,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1877 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:00,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-11-23 14:36:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 912. [2022-11-23 14:36:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 1.6432491767288693) internal successors, (1497), 911 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1497 transitions. [2022-11-23 14:36:00,409 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1497 transitions. Word has length 184 [2022-11-23 14:36:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:00,414 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1497 transitions. [2022-11-23 14:36:00,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1497 transitions. [2022-11-23 14:36:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-23 14:36:00,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:00,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:00,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:36:00,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:00,435 INFO L85 PathProgramCache]: Analyzing trace with hash 958343624, now seen corresponding path program 1 times [2022-11-23 14:36:00,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:00,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603773967] [2022-11-23 14:36:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:00,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:00,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:00,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603773967] [2022-11-23 14:36:00,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603773967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:00,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:00,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:00,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802816484] [2022-11-23 14:36:00,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:00,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:36:00,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:36:00,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:36:00,712 INFO L87 Difference]: Start difference. First operand 912 states and 1497 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:00,986 INFO L93 Difference]: Finished difference Result 1720 states and 2824 transitions. [2022-11-23 14:36:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:00,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 188 [2022-11-23 14:36:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:00,994 INFO L225 Difference]: With dead ends: 1720 [2022-11-23 14:36:00,994 INFO L226 Difference]: Without dead ends: 1277 [2022-11-23 14:36:00,996 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 [2022-11-23 14:36:00,996 INFO L413 NwaCegarLoop]: 1118 mSDtfsCounter, 249 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:00,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 2024 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-11-23 14:36:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1275. [2022-11-23 14:36:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 1.642072213500785) internal successors, (2092), 1274 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 2092 transitions. [2022-11-23 14:36:01,070 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 2092 transitions. Word has length 188 [2022-11-23 14:36:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:01,070 INFO L495 AbstractCegarLoop]: Abstraction has 1275 states and 2092 transitions. [2022-11-23 14:36:01,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 2092 transitions. [2022-11-23 14:36:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-23 14:36:01,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:01,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:01,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:36:01,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:01,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:01,075 INFO L85 PathProgramCache]: Analyzing trace with hash -236514659, now seen corresponding path program 1 times [2022-11-23 14:36:01,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:01,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553304027] [2022-11-23 14:36:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:01,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:01,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:01,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553304027] [2022-11-23 14:36:01,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553304027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:01,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:01,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:01,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687566422] [2022-11-23 14:36:01,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:01,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:36:01,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:01,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:36:01,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:36:01,340 INFO L87 Difference]: Start difference. First operand 1275 states and 2092 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:01,617 INFO L93 Difference]: Finished difference Result 2552 states and 4187 transitions. [2022-11-23 14:36:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:01,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-11-23 14:36:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:01,625 INFO L225 Difference]: With dead ends: 2552 [2022-11-23 14:36:01,625 INFO L226 Difference]: Without dead ends: 1746 [2022-11-23 14:36:01,627 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 [2022-11-23 14:36:01,628 INFO L413 NwaCegarLoop]: 965 mSDtfsCounter, 248 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:01,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1893 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-11-23 14:36:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1744. [2022-11-23 14:36:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 1.6408491107286287) internal successors, (2860), 1743 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2860 transitions. [2022-11-23 14:36:01,767 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2860 transitions. Word has length 190 [2022-11-23 14:36:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:01,768 INFO L495 AbstractCegarLoop]: Abstraction has 1744 states and 2860 transitions. [2022-11-23 14:36:01,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2860 transitions. [2022-11-23 14:36:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-23 14:36:01,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:01,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:01,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:36:01,775 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:01,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1845681186, now seen corresponding path program 1 times [2022-11-23 14:36:01,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:01,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353532] [2022-11-23 14:36:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:01,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:02,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:02,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353532] [2022-11-23 14:36:02,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:02,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:02,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:02,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323640061] [2022-11-23 14:36:02,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:02,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:36:02,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:36:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:36:02,013 INFO L87 Difference]: Start difference. First operand 1744 states and 2860 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:02,445 INFO L93 Difference]: Finished difference Result 4004 states and 6567 transitions. [2022-11-23 14:36:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:02,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-11-23 14:36:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:02,456 INFO L225 Difference]: With dead ends: 4004 [2022-11-23 14:36:02,456 INFO L226 Difference]: Without dead ends: 2757 [2022-11-23 14:36:02,458 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 [2022-11-23 14:36:02,459 INFO L413 NwaCegarLoop]: 1073 mSDtfsCounter, 241 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1980 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:02,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 1980 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2022-11-23 14:36:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2755. [2022-11-23 14:36:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2754 states have (on average 1.6376180101670297) internal successors, (4510), 2754 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:02,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4510 transitions. [2022-11-23 14:36:02,672 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4510 transitions. Word has length 194 [2022-11-23 14:36:02,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:02,673 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4510 transitions. [2022-11-23 14:36:02,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:02,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4510 transitions. [2022-11-23 14:36:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-23 14:36:02,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:02,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:02,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:36:02,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash 457476527, now seen corresponding path program 1 times [2022-11-23 14:36:02,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:02,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448808701] [2022-11-23 14:36:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:02,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:02,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:02,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448808701] [2022-11-23 14:36:02,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448808701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:02,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:02,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:02,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124414026] [2022-11-23 14:36:02,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:02,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:36:02,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:02,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:36:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:36:02,863 INFO L87 Difference]: Start difference. First operand 2755 states and 4510 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:03,335 INFO L93 Difference]: Finished difference Result 6288 states and 10298 transitions. [2022-11-23 14:36:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:03,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-11-23 14:36:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:03,351 INFO L225 Difference]: With dead ends: 6288 [2022-11-23 14:36:03,352 INFO L226 Difference]: Without dead ends: 4030 [2022-11-23 14:36:03,356 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 [2022-11-23 14:36:03,356 INFO L413 NwaCegarLoop]: 966 mSDtfsCounter, 240 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:03,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1895 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2022-11-23 14:36:03,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 4028. [2022-11-23 14:36:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 1.6367022597467098) internal successors, (6591), 4027 states have internal predecessors, (6591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 6591 transitions. [2022-11-23 14:36:03,669 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 6591 transitions. Word has length 196 [2022-11-23 14:36:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:03,670 INFO L495 AbstractCegarLoop]: Abstraction has 4028 states and 6591 transitions. [2022-11-23 14:36:03,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 6591 transitions. [2022-11-23 14:36:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-23 14:36:03,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:03,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:03,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:36:03,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:03,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:03,675 INFO L85 PathProgramCache]: Analyzing trace with hash 170943476, now seen corresponding path program 1 times [2022-11-23 14:36:03,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:03,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760939932] [2022-11-23 14:36:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:03,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:03,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:03,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760939932] [2022-11-23 14:36:03,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760939932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:03,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:03,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:03,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844424842] [2022-11-23 14:36:03,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:03,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:36:03,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:36:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:36:03,845 INFO L87 Difference]: Start difference. First operand 4028 states and 6591 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:04,709 INFO L93 Difference]: Finished difference Result 10332 states and 16898 transitions. [2022-11-23 14:36:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:04,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 200 [2022-11-23 14:36:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:04,735 INFO L225 Difference]: With dead ends: 10332 [2022-11-23 14:36:04,735 INFO L226 Difference]: Without dead ends: 6829 [2022-11-23 14:36:04,741 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 [2022-11-23 14:36:04,744 INFO L413 NwaCegarLoop]: 1028 mSDtfsCounter, 233 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:04,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1936 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2022-11-23 14:36:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 6827. [2022-11-23 14:36:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6827 states, 6826 states have (on average 1.6314093173161441) internal successors, (11136), 6826 states have internal predecessors, (11136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6827 states to 6827 states and 11136 transitions. [2022-11-23 14:36:05,367 INFO L78 Accepts]: Start accepts. Automaton has 6827 states and 11136 transitions. Word has length 200 [2022-11-23 14:36:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:05,368 INFO L495 AbstractCegarLoop]: Abstraction has 6827 states and 11136 transitions. [2022-11-23 14:36:05,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 6827 states and 11136 transitions. [2022-11-23 14:36:05,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-23 14:36:05,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:05,372 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:05,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:36:05,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2055253978, now seen corresponding path program 1 times [2022-11-23 14:36:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:05,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905291353] [2022-11-23 14:36:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:05,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:05,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:05,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905291353] [2022-11-23 14:36:05,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905291353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:05,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:05,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:05,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527525959] [2022-11-23 14:36:05,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:05,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:36:05,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:05,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:36:05,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:36:05,583 INFO L87 Difference]: Start difference. First operand 6827 states and 11136 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:06,627 INFO L93 Difference]: Finished difference Result 16660 states and 27193 transitions. [2022-11-23 14:36:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 202 [2022-11-23 14:36:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:06,688 INFO L225 Difference]: With dead ends: 16660 [2022-11-23 14:36:06,689 INFO L226 Difference]: Without dead ends: 10358 [2022-11-23 14:36:06,698 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 [2022-11-23 14:36:06,699 INFO L413 NwaCegarLoop]: 967 mSDtfsCounter, 232 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:06,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1897 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10358 states. [2022-11-23 14:36:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10358 to 10356. [2022-11-23 14:36:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10356 states, 10355 states have (on average 1.6307098020280058) internal successors, (16886), 10355 states have internal predecessors, (16886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10356 states to 10356 states and 16886 transitions. [2022-11-23 14:36:07,748 INFO L78 Accepts]: Start accepts. Automaton has 10356 states and 16886 transitions. Word has length 202 [2022-11-23 14:36:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:07,748 INFO L495 AbstractCegarLoop]: Abstraction has 10356 states and 16886 transitions. [2022-11-23 14:36:07,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 10356 states and 16886 transitions. [2022-11-23 14:36:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-23 14:36:07,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:07,753 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:07,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:36:07,753 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash 72984107, now seen corresponding path program 1 times [2022-11-23 14:36:07,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:07,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843023793] [2022-11-23 14:36:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:07,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:07,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:07,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843023793] [2022-11-23 14:36:07,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843023793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:07,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:07,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:07,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366983276] [2022-11-23 14:36:07,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:07,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:36:07,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:36:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:36:07,916 INFO L87 Difference]: Start difference. First operand 10356 states and 16886 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:09,487 INFO L93 Difference]: Finished difference Result 27856 states and 45373 transitions. [2022-11-23 14:36:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 206 [2022-11-23 14:36:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:09,539 INFO L225 Difference]: With dead ends: 27856 [2022-11-23 14:36:09,540 INFO L226 Difference]: Without dead ends: 18053 [2022-11-23 14:36:09,555 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 [2022-11-23 14:36:09,556 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 225 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:09,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1892 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18053 states. [2022-11-23 14:36:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18053 to 18051. [2022-11-23 14:36:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18051 states, 18050 states have (on average 1.623601108033241) internal successors, (29306), 18050 states have internal predecessors, (29306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18051 states to 18051 states and 29306 transitions. [2022-11-23 14:36:11,377 INFO L78 Accepts]: Start accepts. Automaton has 18051 states and 29306 transitions. Word has length 206 [2022-11-23 14:36:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:11,378 INFO L495 AbstractCegarLoop]: Abstraction has 18051 states and 29306 transitions. [2022-11-23 14:36:11,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 18051 states and 29306 transitions. [2022-11-23 14:36:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-23 14:36:11,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:11,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:11,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:36:11,382 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:11,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:11,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1479277718, now seen corresponding path program 1 times [2022-11-23 14:36:11,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:11,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016950742] [2022-11-23 14:36:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:11,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:11,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016950742] [2022-11-23 14:36:11,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016950742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:11,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:11,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:11,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858278185] [2022-11-23 14:36:11,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:11,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:36:11,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:11,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:36:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:36:11,579 INFO L87 Difference]: Start difference. First operand 18051 states and 29306 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:13,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:13,484 INFO L93 Difference]: Finished difference Result 45380 states and 73740 transitions. [2022-11-23 14:36:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:13,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2022-11-23 14:36:13,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:13,556 INFO L225 Difference]: With dead ends: 45380 [2022-11-23 14:36:13,556 INFO L226 Difference]: Without dead ends: 27882 [2022-11-23 14:36:13,576 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 [2022-11-23 14:36:13,576 INFO L413 NwaCegarLoop]: 968 mSDtfsCounter, 224 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:13,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1899 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27882 states. [2022-11-23 14:36:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27882 to 27880. [2022-11-23 14:36:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27880 states, 27879 states have (on average 1.6231930844004447) internal successors, (45253), 27879 states have internal predecessors, (45253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27880 states to 27880 states and 45253 transitions. [2022-11-23 14:36:16,053 INFO L78 Accepts]: Start accepts. Automaton has 27880 states and 45253 transitions. Word has length 208 [2022-11-23 14:36:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:16,054 INFO L495 AbstractCegarLoop]: Abstraction has 27880 states and 45253 transitions. [2022-11-23 14:36:16,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 27880 states and 45253 transitions. [2022-11-23 14:36:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-23 14:36:16,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:16,058 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:16,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:36:16,058 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:16,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:16,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1890289317, now seen corresponding path program 1 times [2022-11-23 14:36:16,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:16,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819229452] [2022-11-23 14:36:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:16,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:16,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:16,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819229452] [2022-11-23 14:36:16,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819229452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:16,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:16,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:36:16,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594469648] [2022-11-23 14:36:16,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:16,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:36:16,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:16,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:36:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:36:16,408 INFO L87 Difference]: Start difference. First operand 27880 states and 45253 transitions. Second operand has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:21,218 INFO L93 Difference]: Finished difference Result 68868 states and 111664 transitions. [2022-11-23 14:36:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:36:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2022-11-23 14:36:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:21,316 INFO L225 Difference]: With dead ends: 68868 [2022-11-23 14:36:21,316 INFO L226 Difference]: Without dead ends: 41569 [2022-11-23 14:36:21,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:36:21,347 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 2466 mSDsluCounter, 9297 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2466 SdHoareTripleChecker+Valid, 10272 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:21,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2466 Valid, 10272 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:36:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41569 states. [2022-11-23 14:36:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41569 to 41551. [2022-11-23 14:36:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41551 states, 41550 states have (on average 1.6161973525872442) internal successors, (67153), 41550 states have internal predecessors, (67153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41551 states to 41551 states and 67153 transitions. [2022-11-23 14:36:24,392 INFO L78 Accepts]: Start accepts. Automaton has 41551 states and 67153 transitions. Word has length 212 [2022-11-23 14:36:24,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:24,393 INFO L495 AbstractCegarLoop]: Abstraction has 41551 states and 67153 transitions. [2022-11-23 14:36:24,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 41551 states and 67153 transitions. [2022-11-23 14:36:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-23 14:36:24,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:24,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:24,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:36:24,398 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1458953532, now seen corresponding path program 1 times [2022-11-23 14:36:24,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:24,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447946519] [2022-11-23 14:36:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:24,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:24,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:24,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447946519] [2022-11-23 14:36:24,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447946519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:24,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:24,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:36:24,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093370672] [2022-11-23 14:36:24,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:24,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:36:24,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:36:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:36:24,635 INFO L87 Difference]: Start difference. First operand 41551 states and 67153 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:27,550 INFO L93 Difference]: Finished difference Result 82523 states and 133362 transitions. [2022-11-23 14:36:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:36:27,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2022-11-23 14:36:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:27,640 INFO L225 Difference]: With dead ends: 82523 [2022-11-23 14:36:27,640 INFO L226 Difference]: Without dead ends: 41553 [2022-11-23 14:36:27,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:36:27,679 INFO L413 NwaCegarLoop]: 958 mSDtfsCounter, 478 mSDsluCounter, 1864 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 2822 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:27,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 2822 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41553 states. [2022-11-23 14:36:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41553 to 41551. [2022-11-23 14:36:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41551 states, 41550 states have (on average 1.6138868832731648) internal successors, (67057), 41550 states have internal predecessors, (67057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41551 states to 41551 states and 67057 transitions. [2022-11-23 14:36:30,508 INFO L78 Accepts]: Start accepts. Automaton has 41551 states and 67057 transitions. Word has length 213 [2022-11-23 14:36:30,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:30,509 INFO L495 AbstractCegarLoop]: Abstraction has 41551 states and 67057 transitions. [2022-11-23 14:36:30,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:30,509 INFO L276 IsEmpty]: Start isEmpty. Operand 41551 states and 67057 transitions. [2022-11-23 14:36:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-23 14:36:30,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:30,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:30,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:36:30,513 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:30,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2084142526, now seen corresponding path program 1 times [2022-11-23 14:36:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:30,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208049311] [2022-11-23 14:36:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:30,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:30,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208049311] [2022-11-23 14:36:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208049311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:30,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:30,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:36:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323393471] [2022-11-23 14:36:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:30,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:36:30,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:36:30,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:36:30,714 INFO L87 Difference]: Start difference. First operand 41551 states and 67057 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:33,978 INFO L93 Difference]: Finished difference Result 82523 states and 133170 transitions. [2022-11-23 14:36:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:36:33,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2022-11-23 14:36:33,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:34,063 INFO L225 Difference]: With dead ends: 82523 [2022-11-23 14:36:34,063 INFO L226 Difference]: Without dead ends: 41553 [2022-11-23 14:36:34,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:36:34,093 INFO L413 NwaCegarLoop]: 962 mSDtfsCounter, 486 mSDsluCounter, 1866 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:34,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 2828 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41553 states. [2022-11-23 14:36:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41553 to 41551. [2022-11-23 14:36:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41551 states, 41550 states have (on average 1.6115764139590854) internal successors, (66961), 41550 states have internal predecessors, (66961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41551 states to 41551 states and 66961 transitions. [2022-11-23 14:36:37,624 INFO L78 Accepts]: Start accepts. Automaton has 41551 states and 66961 transitions. Word has length 214 [2022-11-23 14:36:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:37,625 INFO L495 AbstractCegarLoop]: Abstraction has 41551 states and 66961 transitions. [2022-11-23 14:36:37,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:36:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 41551 states and 66961 transitions. [2022-11-23 14:36:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-23 14:36:37,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:37,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:37,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:36:37,629 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash -246412605, now seen corresponding path program 1 times [2022-11-23 14:36:37,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:37,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090843261] [2022-11-23 14:36:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:37,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:37,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:37,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090843261] [2022-11-23 14:36:37,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090843261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:37,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:37,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:36:37,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723445571] [2022-11-23 14:36:37,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:37,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:36:37,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:37,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:36:37,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:36:37,832 INFO L87 Difference]: Start difference. First operand 41551 states and 66961 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)