./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur --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 b86eed5380d57cac13df908fa4bd28a3c3af485a2a70f27e08920aaaec0ccb21 --- 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-38b53e6 [2022-11-26 01:01:17,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:01:17,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:01:17,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:01:17,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:01:17,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:01:17,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:01:17,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:01:17,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:01:17,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:01:17,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:01:17,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:01:17,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:01:17,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:01:17,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:01:17,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:01:17,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:01:17,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:01:17,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:01:17,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:01:17,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:01:17,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:01:17,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:01:17,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:01:17,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:01:17,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:01:17,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:01:17,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:01:17,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:01:17,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:01:17,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:01:17,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:01:17,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:01:17,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:01:17,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:01:17,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:01:17,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:01:17,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:01:17,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:01:17,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:01:17,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:01:17,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:01:17,996 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:01:17,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:01:17,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:01:17,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:01:17,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:01:17,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:01:17,998 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:01:17,998 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:01:17,998 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:01:17,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:01:17,999 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:01:17,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:01:17,999 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:01:17,999 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:01:18,000 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:01:18,000 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:01:18,000 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:01:18,000 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:01:18,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:01:18,001 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:01:18,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:01:18,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:01:18,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:01:18,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:01:18,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:01:18,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:01:18,002 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:01:18,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:01:18,002 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:01:18,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:01:18,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:01:18,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:01:18,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:18,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:01:18,004 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:01:18,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:01:18,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:01:18,010 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:01:18,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:01:18,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:01:18,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:01:18,011 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_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b86eed5380d57cac13df908fa4bd28a3c3af485a2a70f27e08920aaaec0ccb21 [2022-11-26 01:01:18,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:01:18,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:01:18,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:01:18,328 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:01:18,328 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:01:18,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2022-11-26 01:01:21,532 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:01:21,767 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:01:21,774 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2022-11-26 01:01:21,785 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/data/9532b62e2/ce8c7f1ae94a4e6297a03e3ea1a48203/FLAGe63bec584 [2022-11-26 01:01:21,800 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/data/9532b62e2/ce8c7f1ae94a4e6297a03e3ea1a48203 [2022-11-26 01:01:21,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:01:21,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:01:21,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:21,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:01:21,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:01:21,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:21" (1/1) ... [2022-11-26 01:01:21,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce44b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:21, skipping insertion in model container [2022-11-26 01:01:21,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:21" (1/1) ... [2022-11-26 01:01:21,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:01:21,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:01:22,085 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_86284e84-5dd4-40d3-9c8a-bde5ab16b244/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c[6696,6709] [2022-11-26 01:01:22,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:22,140 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:01:22,214 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_86284e84-5dd4-40d3-9c8a-bde5ab16b244/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c[6696,6709] [2022-11-26 01:01:22,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:22,251 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:01:22,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22 WrapperNode [2022-11-26 01:01:22,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:22,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:01:22,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:01:22,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:01:22,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,323 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 496 [2022-11-26 01:01:22,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:01:22,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:01:22,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:01:22,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:01:22,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,364 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:01:22,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:01:22,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:01:22,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:01:22,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (1/1) ... [2022-11-26 01:01:22,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:22,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:22,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:01:22,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:01:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:01:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:01:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:01:22,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:01:22,606 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:01:22,608 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:01:23,165 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:01:23,303 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:01:23,304 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 01:01:23,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:01:23 BoogieIcfgContainer [2022-11-26 01:01:23,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:01:23,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:01:23,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:01:23,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:01:23,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:01:21" (1/3) ... [2022-11-26 01:01:23,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed2ea42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:01:23, skipping insertion in model container [2022-11-26 01:01:23,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:22" (2/3) ... [2022-11-26 01:01:23,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed2ea42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:01:23, skipping insertion in model container [2022-11-26 01:01:23,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:01:23" (3/3) ... [2022-11-26 01:01:23,315 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2022-11-26 01:01:23,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:01:23,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:01:23,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:01:23,394 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;@50eee13b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:01:23,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:01:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 87 states have (on average 1.7471264367816093) internal successors, (152), 88 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-26 01:01:23,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:23,416 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] [2022-11-26 01:01:23,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2033501881, now seen corresponding path program 1 times [2022-11-26 01:01:23,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:23,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30795649] [2022-11-26 01:01:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:23,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:23,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:23,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30795649] [2022-11-26 01:01:23,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30795649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:23,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:23,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:01:23,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731017727] [2022-11-26 01:01:23,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:23,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:23,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:24,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:24,042 INFO L87 Difference]: Start difference. First operand has 89 states, 87 states have (on average 1.7471264367816093) internal successors, (152), 88 states have internal predecessors, (152), 0 states have call successors, (0), 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 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:24,149 INFO L93 Difference]: Finished difference Result 179 states and 284 transitions. [2022-11-26 01:01:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-11-26 01:01:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:24,163 INFO L225 Difference]: With dead ends: 179 [2022-11-26 01:01:24,163 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 01:01:24,169 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 [2022-11-26 01:01:24,173 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 101 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:24,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 253 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:24,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 01:01:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-11-26 01:01:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.328) internal successors, (166), 125 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2022-11-26 01:01:24,253 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 59 [2022-11-26 01:01:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:24,257 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2022-11-26 01:01:24,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2022-11-26 01:01:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-26 01:01:24,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:24,264 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] [2022-11-26 01:01:24,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:01:24,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:24,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1181302857, now seen corresponding path program 1 times [2022-11-26 01:01:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566612680] [2022-11-26 01:01:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:24,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:24,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:24,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566612680] [2022-11-26 01:01:24,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566612680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:24,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:24,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:01:24,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38078156] [2022-11-26 01:01:24,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:24,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:24,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:24,442 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:24,542 INFO L93 Difference]: Finished difference Result 286 states and 402 transitions. [2022-11-26 01:01:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:24,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2022-11-26 01:01:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:24,547 INFO L225 Difference]: With dead ends: 286 [2022-11-26 01:01:24,548 INFO L226 Difference]: Without dead ends: 202 [2022-11-26 01:01:24,549 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 [2022-11-26 01:01:24,553 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 58 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:24,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 202 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-26 01:01:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-11-26 01:01:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.3819095477386936) internal successors, (275), 199 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 275 transitions. [2022-11-26 01:01:24,615 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 275 transitions. Word has length 62 [2022-11-26 01:01:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:24,617 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 275 transitions. [2022-11-26 01:01:24,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:24,618 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 275 transitions. [2022-11-26 01:01:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-26 01:01:24,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:24,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:24,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:01:24,625 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:24,627 INFO L85 PathProgramCache]: Analyzing trace with hash -155062584, now seen corresponding path program 1 times [2022-11-26 01:01:24,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:24,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196186066] [2022-11-26 01:01:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:24,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:24,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:24,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196186066] [2022-11-26 01:01:24,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196186066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:24,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:24,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:01:24,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645284893] [2022-11-26 01:01:24,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:24,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:24,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:24,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:24,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:24,761 INFO L87 Difference]: Start difference. First operand 200 states and 275 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:24,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:24,845 INFO L93 Difference]: Finished difference Result 500 states and 717 transitions. [2022-11-26 01:01:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-26 01:01:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:24,852 INFO L225 Difference]: With dead ends: 500 [2022-11-26 01:01:24,852 INFO L226 Difference]: Without dead ends: 342 [2022-11-26 01:01:24,859 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 [2022-11-26 01:01:24,863 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 53 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:24,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 198 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:01:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-26 01:01:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 340. [2022-11-26 01:01:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.4129793510324484) internal successors, (479), 339 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 479 transitions. [2022-11-26 01:01:24,929 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 479 transitions. Word has length 65 [2022-11-26 01:01:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:24,930 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 479 transitions. [2022-11-26 01:01:24,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 479 transitions. [2022-11-26 01:01:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 01:01:24,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:24,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:24,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 01:01:24,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:24,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1933041947, now seen corresponding path program 1 times [2022-11-26 01:01:24,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:24,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299637360] [2022-11-26 01:01:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:24,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:25,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:25,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299637360] [2022-11-26 01:01:25,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299637360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:25,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:25,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:01:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195471833] [2022-11-26 01:01:25,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:25,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:25,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:25,100 INFO L87 Difference]: Start difference. First operand 340 states and 479 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:25,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:25,221 INFO L93 Difference]: Finished difference Result 904 states and 1305 transitions. [2022-11-26 01:01:25,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:25,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-26 01:01:25,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:25,225 INFO L225 Difference]: With dead ends: 904 [2022-11-26 01:01:25,225 INFO L226 Difference]: Without dead ends: 606 [2022-11-26 01:01:25,226 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 [2022-11-26 01:01:25,227 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 48 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:25,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 194 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:01:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-26 01:01:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 604. [2022-11-26 01:01:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.4245439469320067) internal successors, (859), 603 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 859 transitions. [2022-11-26 01:01:25,315 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 859 transitions. Word has length 68 [2022-11-26 01:01:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:25,316 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 859 transitions. [2022-11-26 01:01:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 859 transitions. [2022-11-26 01:01:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 01:01:25,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:25,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:25,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 01:01:25,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash 165325669, now seen corresponding path program 1 times [2022-11-26 01:01:25,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:25,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590522263] [2022-11-26 01:01:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:25,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:25,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:25,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590522263] [2022-11-26 01:01:25,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590522263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:25,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:25,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:01:25,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17830544] [2022-11-26 01:01:25,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:25,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:25,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:25,412 INFO L87 Difference]: Start difference. First operand 604 states and 859 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:25,694 INFO L93 Difference]: Finished difference Result 1664 states and 2397 transitions. [2022-11-26 01:01:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:25,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-26 01:01:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:25,701 INFO L225 Difference]: With dead ends: 1664 [2022-11-26 01:01:25,701 INFO L226 Difference]: Without dead ends: 1102 [2022-11-26 01:01:25,703 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 [2022-11-26 01:01:25,705 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 43 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:25,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 190 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:01:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-11-26 01:01:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1100. [2022-11-26 01:01:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 1.4222020018198362) internal successors, (1563), 1099 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1563 transitions. [2022-11-26 01:01:25,911 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1563 transitions. Word has length 71 [2022-11-26 01:01:25,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:25,913 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1563 transitions. [2022-11-26 01:01:25,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1563 transitions. [2022-11-26 01:01:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 01:01:25,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:25,921 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] [2022-11-26 01:01:25,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 01:01:25,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:25,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash -945514294, now seen corresponding path program 1 times [2022-11-26 01:01:25,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:25,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051832337] [2022-11-26 01:01:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:25,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:26,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:26,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051832337] [2022-11-26 01:01:26,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051832337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:26,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:26,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:01:26,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501637313] [2022-11-26 01:01:26,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:26,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:26,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:26,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:26,047 INFO L87 Difference]: Start difference. First operand 1100 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:26,512 INFO L93 Difference]: Finished difference Result 3088 states and 4413 transitions. [2022-11-26 01:01:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-26 01:01:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:26,520 INFO L225 Difference]: With dead ends: 3088 [2022-11-26 01:01:26,521 INFO L226 Difference]: Without dead ends: 2030 [2022-11-26 01:01:26,523 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 [2022-11-26 01:01:26,525 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 38 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:26,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 186 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:01:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-11-26 01:01:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 2028. [2022-11-26 01:01:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 1.4104588061174148) internal successors, (2859), 2027 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2859 transitions. [2022-11-26 01:01:26,862 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2859 transitions. Word has length 74 [2022-11-26 01:01:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:26,862 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 2859 transitions. [2022-11-26 01:01:26,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2859 transitions. [2022-11-26 01:01:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 01:01:26,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:26,866 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] [2022-11-26 01:01:26,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 01:01:26,866 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:26,867 INFO L85 PathProgramCache]: Analyzing trace with hash 88724831, now seen corresponding path program 1 times [2022-11-26 01:01:26,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:26,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705356107] [2022-11-26 01:01:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:26,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:27,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:27,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705356107] [2022-11-26 01:01:27,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705356107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:27,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:27,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:01:27,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623473636] [2022-11-26 01:01:27,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:27,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:01:27,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:27,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:01:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:01:27,118 INFO L87 Difference]: Start difference. First operand 2028 states and 2859 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:28,551 INFO L93 Difference]: Finished difference Result 8258 states and 11740 transitions. [2022-11-26 01:01:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:01:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-26 01:01:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:28,574 INFO L225 Difference]: With dead ends: 8258 [2022-11-26 01:01:28,574 INFO L226 Difference]: Without dead ends: 6272 [2022-11-26 01:01:28,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:01:28,584 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 809 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:28,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 2134 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:01:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6272 states. [2022-11-26 01:01:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6272 to 2728. [2022-11-26 01:01:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2727 states have (on average 1.3986065273193986) internal successors, (3814), 2727 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 3814 transitions. [2022-11-26 01:01:29,237 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 3814 transitions. Word has length 77 [2022-11-26 01:01:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:29,237 INFO L495 AbstractCegarLoop]: Abstraction has 2728 states and 3814 transitions. [2022-11-26 01:01:29,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 3814 transitions. [2022-11-26 01:01:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 01:01:29,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:29,239 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] [2022-11-26 01:01:29,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 01:01:29,240 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:29,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1548470038, now seen corresponding path program 1 times [2022-11-26 01:01:29,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:29,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195910958] [2022-11-26 01:01:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:29,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:29,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195910958] [2022-11-26 01:01:29,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195910958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:29,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:29,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:01:29,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35906480] [2022-11-26 01:01:29,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:29,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:29,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:29,319 INFO L87 Difference]: Start difference. First operand 2728 states and 3814 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:30,152 INFO L93 Difference]: Finished difference Result 6982 states and 9840 transitions. [2022-11-26 01:01:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:30,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-26 01:01:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:30,169 INFO L225 Difference]: With dead ends: 6982 [2022-11-26 01:01:30,169 INFO L226 Difference]: Without dead ends: 4296 [2022-11-26 01:01:30,173 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 [2022-11-26 01:01:30,174 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 32 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:30,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 157 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:01:30,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2022-11-26 01:01:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4294. [2022-11-26 01:01:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.4055439086885628) internal successors, (6034), 4293 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6034 transitions. [2022-11-26 01:01:30,858 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6034 transitions. Word has length 79 [2022-11-26 01:01:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:30,858 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 6034 transitions. [2022-11-26 01:01:30,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6034 transitions. [2022-11-26 01:01:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 01:01:30,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:30,859 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] [2022-11-26 01:01:30,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 01:01:30,860 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:30,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1535600326, now seen corresponding path program 1 times [2022-11-26 01:01:30,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:30,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611025485] [2022-11-26 01:01:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:30,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:31,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:31,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611025485] [2022-11-26 01:01:31,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611025485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:31,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:31,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:01:31,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592848805] [2022-11-26 01:01:31,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:31,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:01:31,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:01:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:01:31,304 INFO L87 Difference]: Start difference. First operand 4294 states and 6034 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:32,537 INFO L93 Difference]: Finished difference Result 8546 states and 12025 transitions. [2022-11-26 01:01:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:01:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-26 01:01:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:32,553 INFO L225 Difference]: With dead ends: 8546 [2022-11-26 01:01:32,554 INFO L226 Difference]: Without dead ends: 4296 [2022-11-26 01:01:32,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:01:32,559 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 140 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:32,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 418 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2022-11-26 01:01:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4294. [2022-11-26 01:01:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.4050780340088516) internal successors, (6032), 4293 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6032 transitions. [2022-11-26 01:01:33,230 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6032 transitions. Word has length 79 [2022-11-26 01:01:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:33,231 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 6032 transitions. [2022-11-26 01:01:33,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6032 transitions. [2022-11-26 01:01:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 01:01:33,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:33,232 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] [2022-11-26 01:01:33,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 01:01:33,232 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:33,233 INFO L85 PathProgramCache]: Analyzing trace with hash -352746222, now seen corresponding path program 1 times [2022-11-26 01:01:33,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:33,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189813350] [2022-11-26 01:01:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:33,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:33,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:33,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189813350] [2022-11-26 01:01:33,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189813350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:33,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:33,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:01:33,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233098175] [2022-11-26 01:01:33,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:33,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:01:33,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:01:33,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:01:33,362 INFO L87 Difference]: Start difference. First operand 4294 states and 6032 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:33,992 INFO L93 Difference]: Finished difference Result 8544 states and 12020 transitions. [2022-11-26 01:01:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:01:33,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-26 01:01:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:34,007 INFO L225 Difference]: With dead ends: 8544 [2022-11-26 01:01:34,007 INFO L226 Difference]: Without dead ends: 4294 [2022-11-26 01:01:34,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:01:34,014 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 244 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:34,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 82 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2022-11-26 01:01:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4294. [2022-11-26 01:01:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3901700442580947) internal successors, (5968), 4293 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5968 transitions. [2022-11-26 01:01:34,910 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5968 transitions. Word has length 80 [2022-11-26 01:01:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:34,911 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5968 transitions. [2022-11-26 01:01:34,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5968 transitions. [2022-11-26 01:01:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 01:01:34,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:34,912 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] [2022-11-26 01:01:34,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 01:01:34,912 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1115609929, now seen corresponding path program 1 times [2022-11-26 01:01:34,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:34,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554551035] [2022-11-26 01:01:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:34,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:35,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:35,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554551035] [2022-11-26 01:01:35,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554551035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:35,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:35,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:01:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320582904] [2022-11-26 01:01:35,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:35,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:01:35,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:35,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:01:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:01:35,016 INFO L87 Difference]: Start difference. First operand 4294 states and 5968 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:35,792 INFO L93 Difference]: Finished difference Result 8546 states and 11893 transitions. [2022-11-26 01:01:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:01:35,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-26 01:01:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:35,808 INFO L225 Difference]: With dead ends: 8546 [2022-11-26 01:01:35,809 INFO L226 Difference]: Without dead ends: 4296 [2022-11-26 01:01:35,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:01:35,816 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 380 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:35,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 96 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2022-11-26 01:01:36,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 4294. [2022-11-26 01:01:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3752620545073375) internal successors, (5904), 4293 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5904 transitions. [2022-11-26 01:01:36,609 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5904 transitions. Word has length 80 [2022-11-26 01:01:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:36,610 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5904 transitions. [2022-11-26 01:01:36,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5904 transitions. [2022-11-26 01:01:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 01:01:36,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:36,611 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] [2022-11-26 01:01:36,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 01:01:36,611 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1437940252, now seen corresponding path program 1 times [2022-11-26 01:01:36,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:36,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332080536] [2022-11-26 01:01:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:36,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:36,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:36,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332080536] [2022-11-26 01:01:36,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332080536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:36,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:36,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:01:36,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414007253] [2022-11-26 01:01:36,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:36,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:01:36,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:36,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:01:36,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:01:36,721 INFO L87 Difference]: Start difference. First operand 4294 states and 5904 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:37,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:37,388 INFO L93 Difference]: Finished difference Result 8544 states and 11764 transitions. [2022-11-26 01:01:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:01:37,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-26 01:01:37,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:37,399 INFO L225 Difference]: With dead ends: 8544 [2022-11-26 01:01:37,399 INFO L226 Difference]: Without dead ends: 4294 [2022-11-26 01:01:37,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:01:37,406 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 215 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:37,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 98 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2022-11-26 01:01:38,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4294. [2022-11-26 01:01:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3631493128348475) internal successors, (5852), 4293 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5852 transitions. [2022-11-26 01:01:38,323 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5852 transitions. Word has length 80 [2022-11-26 01:01:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:38,323 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5852 transitions. [2022-11-26 01:01:38,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5852 transitions. [2022-11-26 01:01:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 01:01:38,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:38,326 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] [2022-11-26 01:01:38,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 01:01:38,326 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:38,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:38,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1991494655, now seen corresponding path program 1 times [2022-11-26 01:01:38,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:38,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297586632] [2022-11-26 01:01:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:38,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:38,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:38,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297586632] [2022-11-26 01:01:38,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297586632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:38,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:38,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:01:38,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438254446] [2022-11-26 01:01:38,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:38,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:01:38,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:01:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:01:38,646 INFO L87 Difference]: Start difference. First operand 4294 states and 5852 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:40,097 INFO L93 Difference]: Finished difference Result 5843 states and 7899 transitions. [2022-11-26 01:01:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:01:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-26 01:01:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:40,107 INFO L225 Difference]: With dead ends: 5843 [2022-11-26 01:01:40,108 INFO L226 Difference]: Without dead ends: 5841 [2022-11-26 01:01:40,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:01:40,110 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 150 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:40,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 578 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2022-11-26 01:01:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 4294. [2022-11-26 01:01:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.3556953179594688) internal successors, (5820), 4293 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5820 transitions. [2022-11-26 01:01:40,784 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5820 transitions. Word has length 80 [2022-11-26 01:01:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:40,785 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5820 transitions. [2022-11-26 01:01:40,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5820 transitions. [2022-11-26 01:01:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 01:01:40,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:40,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:40,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 01:01:40,787 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:40,788 INFO L85 PathProgramCache]: Analyzing trace with hash 317313593, now seen corresponding path program 1 times [2022-11-26 01:01:40,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:40,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628488016] [2022-11-26 01:01:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:40,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:57,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628488016] [2022-11-26 01:01:57,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628488016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:01:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247480627] [2022-11-26 01:01:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:57,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:57,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:57,038 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:57,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86284e84-5dd4-40d3-9c8a-bde5ab16b244/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:01:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:57,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-26 01:01:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:27,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:50,964 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 554 DAG size of output: 548 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)