./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS --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 e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda --- 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-8393723 [2022-11-19 08:29:47,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:29:47,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:29:47,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:29:47,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:29:47,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:29:47,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:29:47,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:29:47,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:29:47,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:29:47,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:29:47,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:29:47,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:29:47,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:29:47,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:29:47,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:29:47,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:29:47,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:29:47,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:29:47,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:29:47,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:29:47,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:29:47,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:29:47,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:29:47,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:29:47,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:29:47,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:29:47,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:29:47,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:29:47,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:29:47,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:29:47,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:29:47,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:29:47,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:29:47,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:29:47,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:29:47,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:29:47,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:29:47,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:29:47,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:29:47,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:29:47,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:29:47,988 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:29:47,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:29:47,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:29:47,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:29:47,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:29:47,990 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:29:47,990 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:29:47,990 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:29:47,991 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:29:47,991 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:29:47,992 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:29:47,992 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:29:47,992 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:29:47,993 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:29:47,993 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:29:47,993 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:29:47,993 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:29:47,993 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:29:47,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:29:47,995 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:29:47,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:29:47,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:29:47,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:29:47,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:29:47,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:29:47,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:29:47,997 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:29:47,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:29:47,998 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:29:47,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:29:47,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:29:47,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:29:47,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:29:47,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:29:48,000 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:29:48,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:29:48,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:29:48,001 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:29:48,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:29:48,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:29:48,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:29:48,002 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_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda [2022-11-19 08:29:48,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:29:48,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:29:48,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:29:48,301 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:29:48,302 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:29:48,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2022-11-19 08:29:48,382 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/data/bc7b4d847/01e81217c917408598b97fe4209ee7d0/FLAGaa48bee5b [2022-11-19 08:29:49,021 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:29:49,022 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2022-11-19 08:29:49,050 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/data/bc7b4d847/01e81217c917408598b97fe4209ee7d0/FLAGaa48bee5b [2022-11-19 08:29:49,222 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/data/bc7b4d847/01e81217c917408598b97fe4209ee7d0 [2022-11-19 08:29:49,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:29:49,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:29:49,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:29:49,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:29:49,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:29:49,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:29:49" (1/1) ... [2022-11-19 08:29:49,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f9c3203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:49, skipping insertion in model container [2022-11-19 08:29:49,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:29:49" (1/1) ... [2022-11-19 08:29:49,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:29:49,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:29:49,959 WARN L234 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_8bafd384-c5f5-482a-b9ab-2d894018f2f2/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2022-11-19 08:29:50,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:29:50,012 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:29:50,101 WARN L234 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_8bafd384-c5f5-482a-b9ab-2d894018f2f2/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2022-11-19 08:29:50,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:29:50,145 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:29:50,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50 WrapperNode [2022-11-19 08:29:50,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:29:50,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:29:50,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:29:50,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:29:50,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,293 INFO L138 Inliner]: procedures = 98, calls = 353, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 937 [2022-11-19 08:29:50,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:29:50,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:29:50,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:29:50,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:29:50,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,393 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:29:50,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:29:50,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:29:50,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:29:50,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (1/1) ... [2022-11-19 08:29:50,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:29:50,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:29:50,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:29:50,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bafd384-c5f5-482a-b9ab-2d894018f2f2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:29:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-19 08:29:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-19 08:29:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 08:29:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 08:29:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 08:29:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 08:29:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 08:29:50,512 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 08:29:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 08:29:50,512 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 08:29:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 08:29:50,512 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 08:29:50,513 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-19 08:29:50,513 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-19 08:29:50,513 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-19 08:29:50,513 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-19 08:29:50,513 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 08:29:50,513 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 08:29:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 08:29:50,514 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 08:29:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:29:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-19 08:29:50,514 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-19 08:29:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-19 08:29:50,514 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-19 08:29:50,515 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-19 08:29:50,515 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-19 08:29:50,515 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 08:29:50,515 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 08:29:50,515 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 08:29:50,515 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 08:29:50,516 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-19 08:29:50,516 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-19 08:29:50,516 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 08:29:50,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 08:29:50,516 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 08:29:50,516 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 08:29:50,516 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 08:29:50,517 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 08:29:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 08:29:50,517 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 08:29:50,517 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 08:29:50,517 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 08:29:50,518 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 08:29:50,518 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 08:29:50,519 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 08:29:50,519 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 08:29:50,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:29:50,520 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 08:29:50,521 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 08:29:50,521 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-19 08:29:50,521 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-19 08:29:50,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:29:50,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:29:50,522 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 08:29:50,522 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 08:29:50,522 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-19 08:29:50,522 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-19 08:29:50,765 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:29:50,767 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:29:52,002 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:29:52,829 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:29:52,830 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:29:52,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:29:52 BoogieIcfgContainer [2022-11-19 08:29:52,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:29:52,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:29:52,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:29:52,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:29:52,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:29:49" (1/3) ... [2022-11-19 08:29:52,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618ef6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:29:52, skipping insertion in model container [2022-11-19 08:29:52,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:29:50" (2/3) ... [2022-11-19 08:29:52,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618ef6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:29:52, skipping insertion in model container [2022-11-19 08:29:52,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:29:52" (3/3) ... [2022-11-19 08:29:52,843 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product24.cil.c [2022-11-19 08:29:52,862 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:29:52,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:29:52,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:29:52,937 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;@3745b4f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:29:52,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:29:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-19 08:29:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 08:29:52,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:52,957 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] [2022-11-19 08:29:52,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:52,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059780, now seen corresponding path program 1 times [2022-11-19 08:29:52,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:52,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009244638] [2022-11-19 08:29:52,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:52,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:53,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:53,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009244638] [2022-11-19 08:29:53,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009244638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:53,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:29:53,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:29:53,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92252359] [2022-11-19 08:29:53,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:53,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:29:53,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:53,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:29:53,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:29:53,515 INFO L87 Difference]: Start difference. First operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 08:29:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:53,773 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2022-11-19 08:29:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:29:53,777 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-11-19 08:29:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:53,804 INFO L225 Difference]: With dead ends: 424 [2022-11-19 08:29:53,804 INFO L226 Difference]: Without dead ends: 402 [2022-11-19 08:29:53,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:29:53,815 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:53,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 593 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:29:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-19 08:29:53,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-11-19 08:29:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 270 states have (on average 1.5629629629629629) internal successors, (422), 291 states have internal predecessors, (422), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-19 08:29:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2022-11-19 08:29:53,928 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2022-11-19 08:29:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:53,929 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2022-11-19 08:29:53,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 08:29:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2022-11-19 08:29:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 08:29:53,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:53,942 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] [2022-11-19 08:29:53,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:29:53,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1857954273, now seen corresponding path program 1 times [2022-11-19 08:29:53,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:53,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826482045] [2022-11-19 08:29:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:53,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:29:54,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:54,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826482045] [2022-11-19 08:29:54,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826482045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:54,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:29:54,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:29:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381403226] [2022-11-19 08:29:54,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:29:54,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:29:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:29:54,583 INFO L87 Difference]: Start difference. First operand 402 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 08:29:57,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:57,139 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2022-11-19 08:29:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:29:57,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-11-19 08:29:57,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:57,147 INFO L225 Difference]: With dead ends: 1312 [2022-11-19 08:29:57,147 INFO L226 Difference]: Without dead ends: 926 [2022-11-19 08:29:57,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:29:57,163 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1300 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:57,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1374 Valid, 965 Invalid, 2144 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [475 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 08:29:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-19 08:29:57,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2022-11-19 08:29:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 586 states have (on average 1.5853242320819112) internal successors, (929), 616 states have internal predecessors, (929), 204 states have call successors, (204), 47 states have call predecessors, (204), 48 states have return successors, (206), 188 states have call predecessors, (206), 199 states have call successors, (206) [2022-11-19 08:29:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2022-11-19 08:29:57,268 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2022-11-19 08:29:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:57,269 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2022-11-19 08:29:57,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 08:29:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2022-11-19 08:29:57,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 08:29:57,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:57,274 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 08:29:57,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:29:57,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:57,275 INFO L85 PathProgramCache]: Analyzing trace with hash -5833543, now seen corresponding path program 1 times [2022-11-19 08:29:57,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:57,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139381986] [2022-11-19 08:29:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:57,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:29:57,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:57,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139381986] [2022-11-19 08:29:57,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139381986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:57,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:29:57,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:29:57,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669080635] [2022-11-19 08:29:57,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:57,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:29:57,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:29:57,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:29:57,789 INFO L87 Difference]: Start difference. First operand 839 states and 1339 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 08:30:00,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:00,426 INFO L93 Difference]: Finished difference Result 2617 states and 4223 transitions. [2022-11-19 08:30:00,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:30:00,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2022-11-19 08:30:00,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:00,442 INFO L225 Difference]: With dead ends: 2617 [2022-11-19 08:30:00,442 INFO L226 Difference]: Without dead ends: 1795 [2022-11-19 08:30:00,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:30:00,458 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1222 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2722 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:00,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 1663 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2722 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-19 08:30:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-11-19 08:30:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1708. [2022-11-19 08:30:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1203 states have (on average 1.5901911886949294) internal successors, (1913), 1259 states have internal predecessors, (1913), 406 states have call successors, (406), 91 states have call predecessors, (406), 98 states have return successors, (433), 381 states have call predecessors, (433), 401 states have call successors, (433) [2022-11-19 08:30:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2752 transitions. [2022-11-19 08:30:00,655 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2752 transitions. Word has length 88 [2022-11-19 08:30:00,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:00,656 INFO L495 AbstractCegarLoop]: Abstraction has 1708 states and 2752 transitions. [2022-11-19 08:30:00,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 08:30:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2752 transitions. [2022-11-19 08:30:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-19 08:30:00,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:00,660 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 08:30:00,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:30:00,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1071408980, now seen corresponding path program 1 times [2022-11-19 08:30:00,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:00,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572654406] [2022-11-19 08:30:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:00,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:30:00,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:00,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572654406] [2022-11-19 08:30:00,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572654406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:00,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:00,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:30:00,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220335035] [2022-11-19 08:30:00,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:00,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:30:00,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:00,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:30:00,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:30:00,981 INFO L87 Difference]: Start difference. First operand 1708 states and 2752 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 08:30:01,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:01,795 INFO L93 Difference]: Finished difference Result 1807 states and 2914 transitions. [2022-11-19 08:30:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:01,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-11-19 08:30:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:01,815 INFO L225 Difference]: With dead ends: 1807 [2022-11-19 08:30:01,816 INFO L226 Difference]: Without dead ends: 1792 [2022-11-19 08:30:01,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:30:01,823 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 721 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:01,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1940 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:30:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2022-11-19 08:30:01,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1714. [2022-11-19 08:30:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1209 states have (on average 1.587262200165426) internal successors, (1919), 1265 states have internal predecessors, (1919), 406 states have call successors, (406), 91 states have call predecessors, (406), 98 states have return successors, (433), 381 states have call predecessors, (433), 401 states have call successors, (433) [2022-11-19 08:30:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2758 transitions. [2022-11-19 08:30:02,020 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2758 transitions. Word has length 92 [2022-11-19 08:30:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:02,020 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 2758 transitions. [2022-11-19 08:30:02,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 08:30:02,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2758 transitions. [2022-11-19 08:30:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-19 08:30:02,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:02,025 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:02,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:30:02,026 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1984549610, now seen corresponding path program 1 times [2022-11-19 08:30:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:02,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709600606] [2022-11-19 08:30:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:02,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:30:02,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:02,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709600606] [2022-11-19 08:30:02,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709600606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:02,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:02,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-19 08:30:02,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443095278] [2022-11-19 08:30:02,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:02,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:30:02,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:02,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:30:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:30:02,621 INFO L87 Difference]: Start difference. First operand 1714 states and 2758 transitions. Second operand has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-19 08:30:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:09,592 INFO L93 Difference]: Finished difference Result 4973 states and 7968 transitions. [2022-11-19 08:30:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 08:30:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2022-11-19 08:30:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:09,613 INFO L225 Difference]: With dead ends: 4973 [2022-11-19 08:30:09,614 INFO L226 Difference]: Without dead ends: 3273 [2022-11-19 08:30:09,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 08:30:09,624 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 2773 mSDsluCounter, 3387 mSDsCounter, 0 mSdLazyCounter, 9356 mSolverCounterSat, 1631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2802 SdHoareTripleChecker+Valid, 3939 SdHoareTripleChecker+Invalid, 10987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1631 IncrementalHoareTripleChecker+Valid, 9356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:09,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2802 Valid, 3939 Invalid, 10987 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1631 Valid, 9356 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-19 08:30:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2022-11-19 08:30:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2991. [2022-11-19 08:30:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2069 states have (on average 1.5616239729337844) internal successors, (3231), 2166 states have internal predecessors, (3231), 728 states have call successors, (728), 174 states have call predecessors, (728), 193 states have return successors, (779), 694 states have call predecessors, (779), 723 states have call successors, (779) [2022-11-19 08:30:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 4738 transitions. [2022-11-19 08:30:09,925 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 4738 transitions. Word has length 97 [2022-11-19 08:30:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:09,926 INFO L495 AbstractCegarLoop]: Abstraction has 2991 states and 4738 transitions. [2022-11-19 08:30:09,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-19 08:30:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 4738 transitions. [2022-11-19 08:30:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-19 08:30:09,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:09,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:09,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:30:09,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1903755269, now seen corresponding path program 1 times [2022-11-19 08:30:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:09,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691883895] [2022-11-19 08:30:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:09,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:30:10,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:10,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691883895] [2022-11-19 08:30:10,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691883895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:10,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:10,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:30:10,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711430716] [2022-11-19 08:30:10,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:10,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:10,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:10,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:10,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:10,242 INFO L87 Difference]: Start difference. First operand 2991 states and 4738 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:30:12,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:12,185 INFO L93 Difference]: Finished difference Result 8037 states and 12889 transitions. [2022-11-19 08:30:12,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:12,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2022-11-19 08:30:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:12,219 INFO L225 Difference]: With dead ends: 8037 [2022-11-19 08:30:12,219 INFO L226 Difference]: Without dead ends: 5066 [2022-11-19 08:30:12,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:12,235 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1233 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:12,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1311 Valid, 731 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:30:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2022-11-19 08:30:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4691. [2022-11-19 08:30:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 3252 states have (on average 1.556580565805658) internal successors, (5062), 3413 states have internal predecessors, (5062), 1131 states have call successors, (1131), 262 states have call predecessors, (1131), 307 states have return successors, (1262), 1075 states have call predecessors, (1262), 1126 states have call successors, (1262) [2022-11-19 08:30:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7455 transitions. [2022-11-19 08:30:12,777 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7455 transitions. Word has length 104 [2022-11-19 08:30:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:12,778 INFO L495 AbstractCegarLoop]: Abstraction has 4691 states and 7455 transitions. [2022-11-19 08:30:12,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:30:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7455 transitions. [2022-11-19 08:30:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-19 08:30:12,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:12,785 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:12,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:30:12,786 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:12,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:12,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1112836714, now seen corresponding path program 1 times [2022-11-19 08:30:12,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:12,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101478772] [2022-11-19 08:30:12,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:12,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:30:13,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:13,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101478772] [2022-11-19 08:30:13,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101478772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:13,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:13,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:30:13,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481535703] [2022-11-19 08:30:13,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:13,049 INFO L87 Difference]: Start difference. First operand 4691 states and 7455 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:30:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:15,266 INFO L93 Difference]: Finished difference Result 13030 states and 21062 transitions. [2022-11-19 08:30:15,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:15,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2022-11-19 08:30:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:15,320 INFO L225 Difference]: With dead ends: 13030 [2022-11-19 08:30:15,320 INFO L226 Difference]: Without dead ends: 8362 [2022-11-19 08:30:15,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:15,343 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1220 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:15,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 740 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:30:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8362 states. [2022-11-19 08:30:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8362 to 7900. [2022-11-19 08:30:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 5490 states have (on average 1.5546448087431695) internal successors, (8535), 5792 states have internal predecessors, (8535), 1875 states have call successors, (1875), 438 states have call predecessors, (1875), 534 states have return successors, (2226), 1769 states have call predecessors, (2226), 1870 states have call successors, (2226) [2022-11-19 08:30:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 12636 transitions. [2022-11-19 08:30:16,330 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 12636 transitions. Word has length 105 [2022-11-19 08:30:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:16,332 INFO L495 AbstractCegarLoop]: Abstraction has 7900 states and 12636 transitions. [2022-11-19 08:30:16,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:30:16,342 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 12636 transitions. [2022-11-19 08:30:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 08:30:16,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:16,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:16,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:30:16,346 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash 137911581, now seen corresponding path program 1 times [2022-11-19 08:30:16,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:16,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239015770] [2022-11-19 08:30:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:16,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:30:16,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:16,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239015770] [2022-11-19 08:30:16,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239015770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:16,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:16,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:30:16,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127505294] [2022-11-19 08:30:16,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:16,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:16,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:16,637 INFO L87 Difference]: Start difference. First operand 7900 states and 12636 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:30:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:19,443 INFO L93 Difference]: Finished difference Result 22793 states and 37460 transitions. [2022-11-19 08:30:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2022-11-19 08:30:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:19,545 INFO L225 Difference]: With dead ends: 22793 [2022-11-19 08:30:19,545 INFO L226 Difference]: Without dead ends: 14922 [2022-11-19 08:30:19,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:19,599 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1207 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:19,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 749 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:30:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14922 states. [2022-11-19 08:30:21,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14922 to 14257. [2022-11-19 08:30:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14257 states, 9913 states have (on average 1.5507918894381116) internal successors, (15373), 10511 states have internal predecessors, (15373), 3341 states have call successors, (3341), 790 states have call predecessors, (3341), 1002 states have return successors, (4384), 3135 states have call predecessors, (4384), 3336 states have call successors, (4384) [2022-11-19 08:30:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14257 states to 14257 states and 23098 transitions. [2022-11-19 08:30:21,273 INFO L78 Accepts]: Start accepts. Automaton has 14257 states and 23098 transitions. Word has length 106 [2022-11-19 08:30:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:21,274 INFO L495 AbstractCegarLoop]: Abstraction has 14257 states and 23098 transitions. [2022-11-19 08:30:21,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:30:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 14257 states and 23098 transitions. [2022-11-19 08:30:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 08:30:21,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:21,288 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:21,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:30:21,291 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash -19992564, now seen corresponding path program 1 times [2022-11-19 08:30:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:21,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555731864] [2022-11-19 08:30:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:21,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:30:21,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:21,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555731864] [2022-11-19 08:30:21,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555731864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:21,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:21,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:30:21,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536201498] [2022-11-19 08:30:21,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:21,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:21,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:21,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:21,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:21,562 INFO L87 Difference]: Start difference. First operand 14257 states and 23098 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:30:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:25,258 INFO L93 Difference]: Finished difference Result 42146 states and 71423 transitions. [2022-11-19 08:30:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:25,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2022-11-19 08:30:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:25,457 INFO L225 Difference]: With dead ends: 42146 [2022-11-19 08:30:25,458 INFO L226 Difference]: Without dead ends: 27930 [2022-11-19 08:30:25,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:25,540 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1194 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:25,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 761 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:30:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27930 states. [2022-11-19 08:30:28,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27930 to 26830. [2022-11-19 08:30:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26830 states, 18640 states have (on average 1.5454399141630901) internal successors, (28807), 19858 states have internal predecessors, (28807), 6223 states have call successors, (6223), 1494 states have call predecessors, (6223), 1966 states have return successors, (9502), 5817 states have call predecessors, (9502), 6218 states have call successors, (9502) [2022-11-19 08:30:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26830 states to 26830 states and 44532 transitions. [2022-11-19 08:30:28,245 INFO L78 Accepts]: Start accepts. Automaton has 26830 states and 44532 transitions. Word has length 107 [2022-11-19 08:30:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:28,246 INFO L495 AbstractCegarLoop]: Abstraction has 26830 states and 44532 transitions. [2022-11-19 08:30:28,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:30:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 26830 states and 44532 transitions. [2022-11-19 08:30:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 08:30:28,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:28,252 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:28,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:30:28,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash -620049857, now seen corresponding path program 1 times [2022-11-19 08:30:28,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:28,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257065035] [2022-11-19 08:30:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:28,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:30:28,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:28,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257065035] [2022-11-19 08:30:28,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257065035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:28,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:28,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:30:28,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522726355] [2022-11-19 08:30:28,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:28,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:28,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:28,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:28,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:28,578 INFO L87 Difference]: Start difference. First operand 26830 states and 44532 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:30:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:34,761 INFO L93 Difference]: Finished difference Result 80628 states and 144213 transitions. [2022-11-19 08:30:34,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:34,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2022-11-19 08:30:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:35,094 INFO L225 Difference]: With dead ends: 80628 [2022-11-19 08:30:35,095 INFO L226 Difference]: Without dead ends: 53853 [2022-11-19 08:30:35,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:35,218 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1203 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:35,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 754 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:30:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53853 states. [2022-11-19 08:30:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53853 to 51494. [2022-11-19 08:30:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51494 states, 35791 states have (on average 1.542790086893353) internal successors, (55218), 38195 states have internal predecessors, (55218), 11873 states have call successors, (11873), 2892 states have call predecessors, (11873), 3829 states have return successors, (21476), 11066 states have call predecessors, (21476), 11868 states have call successors, (21476) [2022-11-19 08:30:40,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51494 states to 51494 states and 88567 transitions. [2022-11-19 08:30:40,782 INFO L78 Accepts]: Start accepts. Automaton has 51494 states and 88567 transitions. Word has length 108 [2022-11-19 08:30:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:40,783 INFO L495 AbstractCegarLoop]: Abstraction has 51494 states and 88567 transitions. [2022-11-19 08:30:40,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 08:30:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 51494 states and 88567 transitions. [2022-11-19 08:30:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-19 08:30:40,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:40,796 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:30:40,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:30:40,796 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:40,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:40,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1540139114, now seen corresponding path program 1 times [2022-11-19 08:30:40,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:40,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098021135] [2022-11-19 08:30:40,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:40,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:30:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 08:30:41,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:30:41,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098021135] [2022-11-19 08:30:41,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098021135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:30:41,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:30:41,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:30:41,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095232462] [2022-11-19 08:30:41,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:30:41,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:30:41,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:30:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:30:41,012 INFO L87 Difference]: Start difference. First operand 51494 states and 88567 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-19 08:30:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:46,531 INFO L93 Difference]: Finished difference Result 104654 states and 186136 transitions. [2022-11-19 08:30:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:30:46,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 156 [2022-11-19 08:30:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:46,877 INFO L225 Difference]: With dead ends: 104654 [2022-11-19 08:30:46,877 INFO L226 Difference]: Without dead ends: 53177 [2022-11-19 08:30:47,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:30:47,131 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 30 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:47,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1759 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:30:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53177 states.