./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8 --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 60c415120e2678b24f3b884ebcebefc19905a98d476a557ead28c297441bd0dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:35:19,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:35:19,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:35:19,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:35:19,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:35:19,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:35:19,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:35:19,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:35:19,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:35:19,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:35:19,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:35:19,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:35:19,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:35:19,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:35:19,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:35:19,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:35:19,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:35:19,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:35:19,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:35:19,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:35:19,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:35:19,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:35:19,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:35:19,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:35:19,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:35:19,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:35:19,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:35:19,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:35:19,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:35:19,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:35:19,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:35:19,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:35:19,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:35:19,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:35:19,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:35:19,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:35:19,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:35:19,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:35:19,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:35:19,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:35:19,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:35:19,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:35:19,995 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:35:19,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:35:19,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:35:19,996 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:35:19,996 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:35:19,996 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:35:19,997 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:35:19,997 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:35:19,997 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:35:19,997 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:35:19,998 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:35:19,998 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:35:19,998 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:35:19,998 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:35:19,999 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:35:19,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:35:20,000 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:35:20,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:35:20,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:35:20,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:35:20,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:35:20,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:35:20,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:35:20,001 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:35:20,001 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:35:20,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:35:20,002 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:35:20,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:35:20,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:35:20,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:35:20,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:20,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:35:20,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:35:20,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:35:20,004 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:35:20,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:35:20,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:35:20,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:35:20,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:35:20,005 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60c415120e2678b24f3b884ebcebefc19905a98d476a557ead28c297441bd0dd [2021-11-07 01:35:20,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:35:20,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:35:20,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:35:20,289 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:35:20,290 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:35:20,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 01:35:20,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/data/410de4901/8b677f6b67624c3cba93b2a79c68269d/FLAG847a7f3e5 [2021-11-07 01:35:20,916 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:35:20,917 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 01:35:20,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/data/410de4901/8b677f6b67624c3cba93b2a79c68269d/FLAG847a7f3e5 [2021-11-07 01:35:21,212 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/data/410de4901/8b677f6b67624c3cba93b2a79c68269d [2021-11-07 01:35:21,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:35:21,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:35:21,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:21,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:35:21,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:35:21,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:21,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67450093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21, skipping insertion in model container [2021-11-07 01:35:21,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:21,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:35:21,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:35:21,600 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2021-11-07 01:35:21,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:21,709 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:35:21,791 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2021-11-07 01:35:21,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:21,883 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:35:21,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21 WrapperNode [2021-11-07 01:35:21,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:21,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:35:21,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:35:21,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:35:21,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:21,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:21,976 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:35:21,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:35:21,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:35:21,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:35:21,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:21,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:21,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:22,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:22,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:22,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:22,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:22,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:35:22,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:35:22,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:35:22,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:35:22,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (1/1) ... [2021-11-07 01:35:22,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:22,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:35:22,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:35:22,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:35:22,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:35:22,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:35:22,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:35:22,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:35:24,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:35:24,279 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:35:24,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:35:24 BoogieIcfgContainer [2021-11-07 01:35:24,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:35:24,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:35:24,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:35:24,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:35:24,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:35:21" (1/3) ... [2021-11-07 01:35:24,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b6bc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:35:24, skipping insertion in model container [2021-11-07 01:35:24,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:21" (2/3) ... [2021-11-07 01:35:24,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b6bc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:35:24, skipping insertion in model container [2021-11-07 01:35:24,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:35:24" (3/3) ... [2021-11-07 01:35:24,293 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 01:35:24,305 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:35:24,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:35:24,366 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:35:24,372 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:35:24,372 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:35:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 253 states have (on average 1.6798418972332017) internal successors, (425), 254 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:35:24,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:24,406 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:24,407 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1325608003, now seen corresponding path program 1 times [2021-11-07 01:35:24,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:24,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577556718] [2021-11-07 01:35:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:24,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:24,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:24,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577556718] [2021-11-07 01:35:25,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577556718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:25,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:25,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:35:25,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779501144] [2021-11-07 01:35:25,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:25,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:25,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:25,037 INFO L87 Difference]: Start difference. First operand has 255 states, 253 states have (on average 1.6798418972332017) internal successors, (425), 254 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:25,169 INFO L93 Difference]: Finished difference Result 420 states and 690 transitions. [2021-11-07 01:35:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:25,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 01:35:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:25,187 INFO L225 Difference]: With dead ends: 420 [2021-11-07 01:35:25,187 INFO L226 Difference]: Without dead ends: 325 [2021-11-07 01:35:25,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-07 01:35:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2021-11-07 01:35:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5372670807453417) internal successors, (495), 322 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 495 transitions. [2021-11-07 01:35:25,268 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 495 transitions. Word has length 101 [2021-11-07 01:35:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:25,269 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 495 transitions. [2021-11-07 01:35:25,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 495 transitions. [2021-11-07 01:35:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:35:25,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:25,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:25,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:35:25,275 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash 672364081, now seen corresponding path program 1 times [2021-11-07 01:35:25,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:25,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923905131] [2021-11-07 01:35:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:25,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:25,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:25,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923905131] [2021-11-07 01:35:25,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923905131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:25,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:25,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:35:25,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797292530] [2021-11-07 01:35:25,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:25,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:25,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:25,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:25,467 INFO L87 Difference]: Start difference. First operand 323 states and 495 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:25,554 INFO L93 Difference]: Finished difference Result 571 states and 897 transitions. [2021-11-07 01:35:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:25,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 01:35:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:25,559 INFO L225 Difference]: With dead ends: 571 [2021-11-07 01:35:25,559 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 01:35:25,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 01:35:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 410. [2021-11-07 01:35:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.547677261613692) internal successors, (633), 409 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 633 transitions. [2021-11-07 01:35:25,625 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 633 transitions. Word has length 103 [2021-11-07 01:35:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:25,626 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 633 transitions. [2021-11-07 01:35:25,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 633 transitions. [2021-11-07 01:35:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:35:25,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:25,631 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:25,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:35:25,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1922675800, now seen corresponding path program 1 times [2021-11-07 01:35:25,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:25,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859174190] [2021-11-07 01:35:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:25,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:25,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:25,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859174190] [2021-11-07 01:35:25,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859174190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:25,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:25,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:35:25,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990201138] [2021-11-07 01:35:25,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:25,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:25,782 INFO L87 Difference]: Start difference. First operand 410 states and 633 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:25,834 INFO L93 Difference]: Finished difference Result 849 states and 1344 transitions. [2021-11-07 01:35:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:25,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:35:25,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:25,843 INFO L225 Difference]: With dead ends: 849 [2021-11-07 01:35:25,843 INFO L226 Difference]: Without dead ends: 604 [2021-11-07 01:35:25,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-07 01:35:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 602. [2021-11-07 01:35:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 1.5707154742096505) internal successors, (944), 601 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 944 transitions. [2021-11-07 01:35:25,896 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 944 transitions. Word has length 106 [2021-11-07 01:35:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:25,898 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 944 transitions. [2021-11-07 01:35:25,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 944 transitions. [2021-11-07 01:35:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:35:25,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:25,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:25,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:35:25,907 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1327867533, now seen corresponding path program 1 times [2021-11-07 01:35:25,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:25,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641301602] [2021-11-07 01:35:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:25,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:26,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:26,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641301602] [2021-11-07 01:35:26,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641301602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:26,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:26,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:35:26,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951557212] [2021-11-07 01:35:26,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:26,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:26,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:26,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:26,099 INFO L87 Difference]: Start difference. First operand 602 states and 944 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:26,180 INFO L93 Difference]: Finished difference Result 1302 states and 2074 transitions. [2021-11-07 01:35:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 01:35:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:26,188 INFO L225 Difference]: With dead ends: 1302 [2021-11-07 01:35:26,188 INFO L226 Difference]: Without dead ends: 865 [2021-11-07 01:35:26,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:26,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-11-07 01:35:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2021-11-07 01:35:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.5812064965197217) internal successors, (1363), 862 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1363 transitions. [2021-11-07 01:35:26,250 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1363 transitions. Word has length 108 [2021-11-07 01:35:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:26,252 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1363 transitions. [2021-11-07 01:35:26,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1363 transitions. [2021-11-07 01:35:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 01:35:26,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:26,255 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:26,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:35:26,255 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:26,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1064008304, now seen corresponding path program 1 times [2021-11-07 01:35:26,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:26,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475910838] [2021-11-07 01:35:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:26,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:26,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:26,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475910838] [2021-11-07 01:35:26,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475910838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:26,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:26,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:35:26,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462486615] [2021-11-07 01:35:26,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:26,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:26,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:26,385 INFO L87 Difference]: Start difference. First operand 863 states and 1363 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:26,481 INFO L93 Difference]: Finished difference Result 2070 states and 3318 transitions. [2021-11-07 01:35:26,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:26,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-07 01:35:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:26,492 INFO L225 Difference]: With dead ends: 2070 [2021-11-07 01:35:26,492 INFO L226 Difference]: Without dead ends: 1390 [2021-11-07 01:35:26,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-11-07 01:35:26,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1388. [2021-11-07 01:35:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 1.592645998558039) internal successors, (2209), 1387 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2209 transitions. [2021-11-07 01:35:26,609 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2209 transitions. Word has length 111 [2021-11-07 01:35:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:26,610 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 2209 transitions. [2021-11-07 01:35:26,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2209 transitions. [2021-11-07 01:35:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:35:26,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:26,613 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:26,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:35:26,613 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:26,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:26,614 INFO L85 PathProgramCache]: Analyzing trace with hash -877927785, now seen corresponding path program 1 times [2021-11-07 01:35:26,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:26,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956893394] [2021-11-07 01:35:26,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:26,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:26,705 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:26,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956893394] [2021-11-07 01:35:26,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956893394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:26,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:26,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:35:26,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850871690] [2021-11-07 01:35:26,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:26,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:26,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:26,715 INFO L87 Difference]: Start difference. First operand 1388 states and 2209 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:26,843 INFO L93 Difference]: Finished difference Result 3291 states and 5280 transitions. [2021-11-07 01:35:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:26,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 01:35:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:26,857 INFO L225 Difference]: With dead ends: 3291 [2021-11-07 01:35:26,858 INFO L226 Difference]: Without dead ends: 2086 [2021-11-07 01:35:26,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-11-07 01:35:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 2084. [2021-11-07 01:35:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 1.5962554008641383) internal successors, (3325), 2083 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3325 transitions. [2021-11-07 01:35:27,022 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3325 transitions. Word has length 113 [2021-11-07 01:35:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:27,023 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 3325 transitions. [2021-11-07 01:35:27,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3325 transitions. [2021-11-07 01:35:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 01:35:27,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:27,025 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:27,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:35:27,025 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:27,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2114041290, now seen corresponding path program 1 times [2021-11-07 01:35:27,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:27,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319633829] [2021-11-07 01:35:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:27,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:27,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:27,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319633829] [2021-11-07 01:35:27,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319633829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:27,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:27,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:35:27,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238687249] [2021-11-07 01:35:27,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:27,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:27,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:27,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:27,114 INFO L87 Difference]: Start difference. First operand 2084 states and 3325 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:27,345 INFO L93 Difference]: Finished difference Result 5391 states and 8664 transitions. [2021-11-07 01:35:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 01:35:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:27,371 INFO L225 Difference]: With dead ends: 5391 [2021-11-07 01:35:27,371 INFO L226 Difference]: Without dead ends: 3508 [2021-11-07 01:35:27,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2021-11-07 01:35:27,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3506. [2021-11-07 01:35:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.5982881597717546) internal successors, (5602), 3505 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 5602 transitions. [2021-11-07 01:35:27,678 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 5602 transitions. Word has length 116 [2021-11-07 01:35:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:27,678 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 5602 transitions. [2021-11-07 01:35:27,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 5602 transitions. [2021-11-07 01:35:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:35:27,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:27,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:27,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:35:27,680 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:27,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2139714335, now seen corresponding path program 1 times [2021-11-07 01:35:27,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:27,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997861894] [2021-11-07 01:35:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:27,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:27,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:27,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997861894] [2021-11-07 01:35:27,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997861894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:27,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:27,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:35:27,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564710823] [2021-11-07 01:35:27,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:27,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:27,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:27,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:27,770 INFO L87 Difference]: Start difference. First operand 3506 states and 5602 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:28,175 INFO L93 Difference]: Finished difference Result 8712 states and 13974 transitions. [2021-11-07 01:35:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:28,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 01:35:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:28,210 INFO L225 Difference]: With dead ends: 8712 [2021-11-07 01:35:28,210 INFO L226 Difference]: Without dead ends: 5407 [2021-11-07 01:35:28,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:28,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-11-07 01:35:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 5405. [2021-11-07 01:35:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 5404 states have (on average 1.5978904515173946) internal successors, (8635), 5404 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8635 transitions. [2021-11-07 01:35:28,650 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8635 transitions. Word has length 118 [2021-11-07 01:35:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:28,650 INFO L470 AbstractCegarLoop]: Abstraction has 5405 states and 8635 transitions. [2021-11-07 01:35:28,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8635 transitions. [2021-11-07 01:35:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:35:28,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:28,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:28,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:35:28,653 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash 949471684, now seen corresponding path program 1 times [2021-11-07 01:35:28,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:28,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518975711] [2021-11-07 01:35:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:28,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:28,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:28,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518975711] [2021-11-07 01:35:28,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518975711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:28,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:28,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:35:28,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517381081] [2021-11-07 01:35:28,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:28,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:28,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:28,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:28,780 INFO L87 Difference]: Start difference. First operand 5405 states and 8635 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:29,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:29,826 INFO L93 Difference]: Finished difference Result 13488 states and 21561 transitions. [2021-11-07 01:35:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:35:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 01:35:29,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:29,881 INFO L225 Difference]: With dead ends: 13488 [2021-11-07 01:35:29,882 INFO L226 Difference]: Without dead ends: 8302 [2021-11-07 01:35:29,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:35:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8302 states. [2021-11-07 01:35:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8302 to 8288. [2021-11-07 01:35:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5888741402196211) internal successors, (13167), 8287 states have internal predecessors, (13167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13167 transitions. [2021-11-07 01:35:30,606 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13167 transitions. Word has length 121 [2021-11-07 01:35:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:30,607 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13167 transitions. [2021-11-07 01:35:30,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:30,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13167 transitions. [2021-11-07 01:35:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 01:35:30,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:30,610 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:30,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:35:30,610 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:30,611 INFO L85 PathProgramCache]: Analyzing trace with hash -698210882, now seen corresponding path program 1 times [2021-11-07 01:35:30,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:30,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630597064] [2021-11-07 01:35:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:30,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:30,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:30,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630597064] [2021-11-07 01:35:30,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630597064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:30,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:30,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:35:30,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487321862] [2021-11-07 01:35:30,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:35:30,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:35:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:30,709 INFO L87 Difference]: Start difference. First operand 8288 states and 13167 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:31,334 INFO L93 Difference]: Finished difference Result 16359 states and 26017 transitions. [2021-11-07 01:35:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:35:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-07 01:35:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:31,379 INFO L225 Difference]: With dead ends: 16359 [2021-11-07 01:35:31,379 INFO L226 Difference]: Without dead ends: 8290 [2021-11-07 01:35:31,390 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:35:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-07 01:35:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-07 01:35:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5847713285869434) internal successors, (13133), 8287 states have internal predecessors, (13133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13133 transitions. [2021-11-07 01:35:31,930 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13133 transitions. Word has length 122 [2021-11-07 01:35:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:31,934 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13133 transitions. [2021-11-07 01:35:31,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13133 transitions. [2021-11-07 01:35:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 01:35:31,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:31,936 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:31,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:35:31,937 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:31,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:31,938 INFO L85 PathProgramCache]: Analyzing trace with hash -232204853, now seen corresponding path program 1 times [2021-11-07 01:35:31,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:31,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207792338] [2021-11-07 01:35:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:31,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:32,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:32,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207792338] [2021-11-07 01:35:32,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207792338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:32,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:32,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:35:32,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332894155] [2021-11-07 01:35:32,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:35:32,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:32,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:35:32,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:32,019 INFO L87 Difference]: Start difference. First operand 8288 states and 13133 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:32,704 INFO L93 Difference]: Finished difference Result 16359 states and 25949 transitions. [2021-11-07 01:35:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:35:32,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-07 01:35:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:32,730 INFO L225 Difference]: With dead ends: 16359 [2021-11-07 01:35:32,730 INFO L226 Difference]: Without dead ends: 8290 [2021-11-07 01:35:32,744 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:35:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-07 01:35:33,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-07 01:35:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5806685169542658) internal successors, (13099), 8287 states have internal predecessors, (13099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13099 transitions. [2021-11-07 01:35:33,424 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13099 transitions. Word has length 123 [2021-11-07 01:35:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:33,424 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13099 transitions. [2021-11-07 01:35:33,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13099 transitions. [2021-11-07 01:35:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 01:35:33,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:33,427 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:33,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:35:33,427 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:33,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:33,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1333638181, now seen corresponding path program 1 times [2021-11-07 01:35:33,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:33,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416065581] [2021-11-07 01:35:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:33,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:33,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:33,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416065581] [2021-11-07 01:35:33,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416065581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:33,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:33,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:35:33,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896075145] [2021-11-07 01:35:33,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:35:33,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:33,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:35:33,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:33,501 INFO L87 Difference]: Start difference. First operand 8288 states and 13099 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:33,987 INFO L93 Difference]: Finished difference Result 16359 states and 25881 transitions. [2021-11-07 01:35:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:35:33,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-07 01:35:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:34,009 INFO L225 Difference]: With dead ends: 16359 [2021-11-07 01:35:34,010 INFO L226 Difference]: Without dead ends: 8290 [2021-11-07 01:35:34,024 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:35:34,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-07 01:35:34,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-07 01:35:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.576565705321588) internal successors, (13065), 8287 states have internal predecessors, (13065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:34,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13065 transitions. [2021-11-07 01:35:34,614 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13065 transitions. Word has length 124 [2021-11-07 01:35:34,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:34,615 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13065 transitions. [2021-11-07 01:35:34,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:34,615 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13065 transitions. [2021-11-07 01:35:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 01:35:34,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:34,617 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:34,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:35:34,618 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:34,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1660277294, now seen corresponding path program 1 times [2021-11-07 01:35:34,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:34,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172170169] [2021-11-07 01:35:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:34,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:34,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:34,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172170169] [2021-11-07 01:35:34,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172170169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:34,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:34,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:35:34,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65382686] [2021-11-07 01:35:34,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:35:34,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:34,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:35:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:34,695 INFO L87 Difference]: Start difference. First operand 8288 states and 13065 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:35,250 INFO L93 Difference]: Finished difference Result 16359 states and 25813 transitions. [2021-11-07 01:35:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:35:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-07 01:35:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:35,270 INFO L225 Difference]: With dead ends: 16359 [2021-11-07 01:35:35,270 INFO L226 Difference]: Without dead ends: 8290 [2021-11-07 01:35:35,282 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:35:35,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-07 01:35:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-07 01:35:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5724628936889102) internal successors, (13031), 8287 states have internal predecessors, (13031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13031 transitions. [2021-11-07 01:35:35,808 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13031 transitions. Word has length 125 [2021-11-07 01:35:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:35,809 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13031 transitions. [2021-11-07 01:35:35,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13031 transitions. [2021-11-07 01:35:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 01:35:35,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:35,811 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:35,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:35:35,811 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash 684049603, now seen corresponding path program 1 times [2021-11-07 01:35:35,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:35,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975061206] [2021-11-07 01:35:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:35,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:36,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:36,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975061206] [2021-11-07 01:35:36,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975061206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:36,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:36,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:35:36,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126946349] [2021-11-07 01:35:36,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:36,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:36,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:36,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:36,006 INFO L87 Difference]: Start difference. First operand 8288 states and 13031 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:36,922 INFO L93 Difference]: Finished difference Result 16359 states and 25745 transitions. [2021-11-07 01:35:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:35:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-07 01:35:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:36,946 INFO L225 Difference]: With dead ends: 16359 [2021-11-07 01:35:36,946 INFO L226 Difference]: Without dead ends: 8290 [2021-11-07 01:35:36,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:35:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-07 01:35:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-07 01:35:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5705321588029444) internal successors, (13015), 8287 states have internal predecessors, (13015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13015 transitions. [2021-11-07 01:35:37,599 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13015 transitions. Word has length 127 [2021-11-07 01:35:37,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:37,600 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13015 transitions. [2021-11-07 01:35:37,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13015 transitions. [2021-11-07 01:35:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 01:35:37,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:37,602 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:37,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:35:37,603 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:37,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:37,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1148518135, now seen corresponding path program 1 times [2021-11-07 01:35:37,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:37,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574250325] [2021-11-07 01:35:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:37,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:37,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:37,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574250325] [2021-11-07 01:35:37,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574250325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:37,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:37,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:35:37,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007460794] [2021-11-07 01:35:37,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:37,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:37,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:37,791 INFO L87 Difference]: Start difference. First operand 8288 states and 13015 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:38,783 INFO L93 Difference]: Finished difference Result 20553 states and 32209 transitions. [2021-11-07 01:35:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:35:38,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-07 01:35:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:38,816 INFO L225 Difference]: With dead ends: 20553 [2021-11-07 01:35:38,816 INFO L226 Difference]: Without dead ends: 12484 [2021-11-07 01:35:38,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:35:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-11-07 01:35:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12482. [2021-11-07 01:35:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12482 states, 12481 states have (on average 1.5613332265042865) internal successors, (19487), 12481 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12482 states to 12482 states and 19487 transitions. [2021-11-07 01:35:39,613 INFO L78 Accepts]: Start accepts. Automaton has 12482 states and 19487 transitions. Word has length 130 [2021-11-07 01:35:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:39,614 INFO L470 AbstractCegarLoop]: Abstraction has 12482 states and 19487 transitions. [2021-11-07 01:35:39,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 12482 states and 19487 transitions. [2021-11-07 01:35:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:35:39,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:39,616 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:39,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:35:39,617 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:39,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1277687264, now seen corresponding path program 1 times [2021-11-07 01:35:39,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:39,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466299317] [2021-11-07 01:35:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:39,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:39,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:39,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466299317] [2021-11-07 01:35:39,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466299317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:39,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:39,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:35:39,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826936600] [2021-11-07 01:35:39,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:39,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:39,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:39,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:39,858 INFO L87 Difference]: Start difference. First operand 12482 states and 19487 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:40,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:40,862 INFO L93 Difference]: Finished difference Result 15360 states and 23868 transitions. [2021-11-07 01:35:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:35:40,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 01:35:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:40,895 INFO L225 Difference]: With dead ends: 15360 [2021-11-07 01:35:40,895 INFO L226 Difference]: Without dead ends: 15358 [2021-11-07 01:35:40,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:35:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15358 states. [2021-11-07 01:35:41,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15358 to 12496. [2021-11-07 01:35:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12496 states, 12495 states have (on average 1.5591036414565826) internal successors, (19481), 12495 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12496 states to 12496 states and 19481 transitions. [2021-11-07 01:35:41,764 INFO L78 Accepts]: Start accepts. Automaton has 12496 states and 19481 transitions. Word has length 131 [2021-11-07 01:35:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:41,765 INFO L470 AbstractCegarLoop]: Abstraction has 12496 states and 19481 transitions. [2021-11-07 01:35:41,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 12496 states and 19481 transitions. [2021-11-07 01:35:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 01:35:41,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:41,768 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:41,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:35:41,768 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:41,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1212519615, now seen corresponding path program 1 times [2021-11-07 01:35:41,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:41,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537350201] [2021-11-07 01:35:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:41,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:35:42,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:42,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537350201] [2021-11-07 01:35:42,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537350201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:35:42,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165797189] [2021-11-07 01:35:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:42,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:35:42,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:35:42,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:35:42,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:35:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:42,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:42,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:35:43,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:35:43,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165797189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:43,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:35:43,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-07 01:35:43,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200399383] [2021-11-07 01:35:43,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:35:43,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:43,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:35:43,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:35:43,715 INFO L87 Difference]: Start difference. First operand 12496 states and 19481 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:45,304 INFO L93 Difference]: Finished difference Result 36720 states and 57288 transitions. [2021-11-07 01:35:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:35:45,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-07 01:35:45,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:45,355 INFO L225 Difference]: With dead ends: 36720 [2021-11-07 01:35:45,356 INFO L226 Difference]: Without dead ends: 24233 [2021-11-07 01:35:45,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:35:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24233 states. [2021-11-07 01:35:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24233 to 24231. [2021-11-07 01:35:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24231 states, 24230 states have (on average 1.5529096161782914) internal successors, (37627), 24230 states have internal predecessors, (37627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24231 states to 24231 states and 37627 transitions. [2021-11-07 01:35:47,045 INFO L78 Accepts]: Start accepts. Automaton has 24231 states and 37627 transitions. Word has length 139 [2021-11-07 01:35:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:47,045 INFO L470 AbstractCegarLoop]: Abstraction has 24231 states and 37627 transitions. [2021-11-07 01:35:47,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 24231 states and 37627 transitions. [2021-11-07 01:35:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 01:35:47,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:47,049 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:47,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:47,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 01:35:47,275 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash -392625810, now seen corresponding path program 1 times [2021-11-07 01:35:47,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:47,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399652479] [2021-11-07 01:35:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:47,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:35:47,315 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:47,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399652479] [2021-11-07 01:35:47,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399652479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:47,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:47,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:35:47,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608548608] [2021-11-07 01:35:47,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:47,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:47,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:47,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:47,320 INFO L87 Difference]: Start difference. First operand 24231 states and 37627 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:49,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:49,917 INFO L93 Difference]: Finished difference Result 72665 states and 112839 transitions. [2021-11-07 01:35:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:49,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-07 01:35:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:49,996 INFO L225 Difference]: With dead ends: 72665 [2021-11-07 01:35:49,996 INFO L226 Difference]: Without dead ends: 48451 [2021-11-07 01:35:50,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48451 states. [2021-11-07 01:35:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48451 to 24234. [2021-11-07 01:35:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24234 states, 24233 states have (on average 1.5528411670036726) internal successors, (37630), 24233 states have internal predecessors, (37630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24234 states to 24234 states and 37630 transitions. [2021-11-07 01:35:52,288 INFO L78 Accepts]: Start accepts. Automaton has 24234 states and 37630 transitions. Word has length 141 [2021-11-07 01:35:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:52,289 INFO L470 AbstractCegarLoop]: Abstraction has 24234 states and 37630 transitions. [2021-11-07 01:35:52,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 24234 states and 37630 transitions. [2021-11-07 01:35:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 01:35:52,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:52,291 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:52,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:35:52,292 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:52,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1399762905, now seen corresponding path program 1 times [2021-11-07 01:35:52,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:52,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151614719] [2021-11-07 01:35:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:52,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:35:52,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:52,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151614719] [2021-11-07 01:35:52,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151614719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:52,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:52,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:35:52,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993356220] [2021-11-07 01:35:52,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:52,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:35:52,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:52,386 INFO L87 Difference]: Start difference. First operand 24234 states and 37630 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:55,455 INFO L93 Difference]: Finished difference Result 71663 states and 111326 transitions. [2021-11-07 01:35:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-07 01:35:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:55,535 INFO L225 Difference]: With dead ends: 71663 [2021-11-07 01:35:55,535 INFO L226 Difference]: Without dead ends: 47553 [2021-11-07 01:35:55,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47553 states. [2021-11-07 01:35:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47553 to 47551. [2021-11-07 01:35:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47551 states, 47550 states have (on average 1.549106203995794) internal successors, (73660), 47550 states have internal predecessors, (73660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47551 states to 47551 states and 73660 transitions. [2021-11-07 01:35:59,367 INFO L78 Accepts]: Start accepts. Automaton has 47551 states and 73660 transitions. Word has length 141 [2021-11-07 01:35:59,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:59,368 INFO L470 AbstractCegarLoop]: Abstraction has 47551 states and 73660 transitions. [2021-11-07 01:35:59,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:59,368 INFO L276 IsEmpty]: Start isEmpty. Operand 47551 states and 73660 transitions. [2021-11-07 01:35:59,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 01:35:59,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:59,371 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:59,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 01:35:59,371 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:59,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1636414588, now seen corresponding path program 1 times [2021-11-07 01:35:59,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:35:59,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106637425] [2021-11-07 01:35:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:59,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:35:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:35:59,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:35:59,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106637425] [2021-11-07 01:35:59,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106637425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:35:59,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066719516] [2021-11-07 01:35:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:59,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:35:59,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:35:59,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:36:00,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:36:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:00,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:36:00,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:36:00,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:36:01,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066719516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:01,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:36:01,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-07 01:36:01,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813137816] [2021-11-07 01:36:01,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:36:01,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:36:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:36:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:36:01,547 INFO L87 Difference]: Start difference. First operand 47551 states and 73660 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:08,598 INFO L93 Difference]: Finished difference Result 140249 states and 217370 transitions. [2021-11-07 01:36:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:08,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-07 01:36:08,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:08,777 INFO L225 Difference]: With dead ends: 140249 [2021-11-07 01:36:08,777 INFO L226 Difference]: Without dead ends: 92761 [2021-11-07 01:36:08,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:36:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92761 states. [2021-11-07 01:36:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92761 to 92759. [2021-11-07 01:36:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92759 states, 92758 states have (on average 1.5440393281442033) internal successors, (143222), 92758 states have internal predecessors, (143222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92759 states to 92759 states and 143222 transitions. [2021-11-07 01:36:16,660 INFO L78 Accepts]: Start accepts. Automaton has 92759 states and 143222 transitions. Word has length 142 [2021-11-07 01:36:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:16,661 INFO L470 AbstractCegarLoop]: Abstraction has 92759 states and 143222 transitions. [2021-11-07 01:36:16,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 92759 states and 143222 transitions. [2021-11-07 01:36:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 01:36:16,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:16,668 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:16,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:16,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8968e4ee-7aec-43c6-8a6b-85995f21fe27/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:36:16,871 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:36:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:16,871 INFO L85 PathProgramCache]: Analyzing trace with hash -34359920, now seen corresponding path program 1 times [2021-11-07 01:36:16,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:36:16,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802167922] [2021-11-07 01:36:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:16,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:36:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:36:16,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:36:16,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802167922] [2021-11-07 01:36:16,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802167922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:16,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:16,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:36:16,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107262547] [2021-11-07 01:36:16,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:36:16,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:36:16,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:36:16,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:36:16,934 INFO L87 Difference]: Start difference. First operand 92759 states and 143222 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)