./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI --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 96fefa83b30613ea39cc46bf8d68e79f92b274b671b8c94e773ac8e262712116 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:02:33,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:02:33,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:02:33,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:02:33,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:02:33,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:02:33,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:02:33,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:02:33,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:02:33,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:02:33,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:02:33,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:02:33,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:02:33,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:02:33,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:02:33,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:02:33,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:02:33,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:02:33,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:02:33,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:02:33,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:02:33,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:02:33,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:02:33,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:02:33,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:02:33,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:02:33,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:02:33,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:02:33,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:02:33,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:02:33,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:02:33,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:02:33,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:02:33,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:02:33,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:02:33,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:02:33,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:02:33,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:02:33,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:02:33,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:02:33,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:02:33,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:02:33,985 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:02:33,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:02:33,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:02:33,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:02:33,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:02:33,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:02:33,988 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:02:33,988 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:02:33,988 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:02:33,988 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:02:33,989 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:02:33,990 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:02:33,990 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:02:33,990 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:02:33,990 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:02:33,991 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:02:33,991 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:02:33,991 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:02:33,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:02:33,992 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:02:33,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:02:33,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:02:33,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:02:33,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:02:33,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:02:33,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:02:33,995 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:02:33,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:02:33,995 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:02:33,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:02:33,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:02:33,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:02:33,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:33,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:02:33,997 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:02:33,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:02:33,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:02:33,998 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:02:33,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:02:33,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:02:33,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:02:33,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96fefa83b30613ea39cc46bf8d68e79f92b274b671b8c94e773ac8e262712116 [2022-11-03 02:02:34,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:02:34,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:02:34,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:02:34,404 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:02:34,405 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:02:34,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-03 02:02:34,490 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/data/bc79ff34a/18f23898ebd94b5bbf749d105979e584/FLAG97de403e4 [2022-11-03 02:02:34,999 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:02:35,000 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-03 02:02:35,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/data/bc79ff34a/18f23898ebd94b5bbf749d105979e584/FLAG97de403e4 [2022-11-03 02:02:35,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/data/bc79ff34a/18f23898ebd94b5bbf749d105979e584 [2022-11-03 02:02:35,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:02:35,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:02:35,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:35,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:02:35,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:02:35,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:35,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb2a480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35, skipping insertion in model container [2022-11-03 02:02:35,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:35,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:02:35,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:02:35,768 WARN L230 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_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2022-11-03 02:02:35,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:35,851 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:02:35,920 WARN L230 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_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2022-11-03 02:02:35,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:35,957 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:02:35,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35 WrapperNode [2022-11-03 02:02:35,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:35,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:02:35,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:02:35,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:02:35,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:35,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:36,017 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 588 [2022-11-03 02:02:36,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:02:36,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:02:36,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:02:36,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:02:36,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:36,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:36,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:36,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:36,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:36,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:36,050 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:36,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:36,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:02:36,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:02:36,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:02:36,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:02:36,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (1/1) ... [2022-11-03 02:02:36,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:36,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:36,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:02:36,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:02:36,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:02:36,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:02:36,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:02:36,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:02:36,295 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:02:36,298 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:02:37,064 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:02:37,484 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:02:37,485 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:02:37,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:02:37 BoogieIcfgContainer [2022-11-03 02:02:37,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:02:37,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:02:37,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:02:37,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:02:37,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:02:35" (1/3) ... [2022-11-03 02:02:37,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae2aa48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:02:37, skipping insertion in model container [2022-11-03 02:02:37,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:35" (2/3) ... [2022-11-03 02:02:37,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae2aa48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:02:37, skipping insertion in model container [2022-11-03 02:02:37,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:02:37" (3/3) ... [2022-11-03 02:02:37,502 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-03 02:02:37,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:02:37,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:02:37,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:02:37,585 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3d8692b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:02:37,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:02:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 1.7647058823529411) internal successors, (150), 86 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) [2022-11-03 02:02:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:02:37,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:37,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:37,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:37,606 INFO L85 PathProgramCache]: Analyzing trace with hash 223748202, now seen corresponding path program 1 times [2022-11-03 02:02:37,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:37,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479736045] [2022-11-03 02:02:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:37,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:38,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:38,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479736045] [2022-11-03 02:02:38,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479736045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:38,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:38,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:02:38,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416109568] [2022-11-03 02:02:38,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:38,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:38,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:38,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:38,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:38,269 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 1.7647058823529411) internal successors, (150), 86 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) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:38,427 INFO L93 Difference]: Finished difference Result 191 states and 317 transitions. [2022-11-03 02:02:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2022-11-03 02:02:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:38,454 INFO L225 Difference]: With dead ends: 191 [2022-11-03 02:02:38,469 INFO L226 Difference]: Without dead ends: 129 [2022-11-03 02:02:38,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:38,475 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 92 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:38,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 322 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-03 02:02:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2022-11-03 02:02:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.492063492063492) internal successors, (188), 126 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 188 transitions. [2022-11-03 02:02:38,545 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 188 transitions. Word has length 38 [2022-11-03 02:02:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:38,545 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 188 transitions. [2022-11-03 02:02:38,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 188 transitions. [2022-11-03 02:02:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:02:38,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:38,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:38,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:02:38,548 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:38,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:38,549 INFO L85 PathProgramCache]: Analyzing trace with hash -679526618, now seen corresponding path program 1 times [2022-11-03 02:02:38,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:38,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618243547] [2022-11-03 02:02:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:38,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:38,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618243547] [2022-11-03 02:02:38,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618243547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:38,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:38,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:02:38,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057554698] [2022-11-03 02:02:38,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:38,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:38,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:38,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:38,707 INFO L87 Difference]: Start difference. First operand 127 states and 188 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:38,787 INFO L93 Difference]: Finished difference Result 282 states and 437 transitions. [2022-11-03 02:02:38,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:38,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2022-11-03 02:02:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:38,790 INFO L225 Difference]: With dead ends: 282 [2022-11-03 02:02:38,790 INFO L226 Difference]: Without dead ends: 184 [2022-11-03 02:02:38,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:38,793 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 81 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:38,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 194 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-03 02:02:38,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2022-11-03 02:02:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5082872928176796) internal successors, (273), 181 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 273 transitions. [2022-11-03 02:02:38,818 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 273 transitions. Word has length 40 [2022-11-03 02:02:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:38,819 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 273 transitions. [2022-11-03 02:02:38,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 273 transitions. [2022-11-03 02:02:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:02:38,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:38,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:38,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:02:38,822 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:38,822 INFO L85 PathProgramCache]: Analyzing trace with hash 128704147, now seen corresponding path program 1 times [2022-11-03 02:02:38,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:38,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112079992] [2022-11-03 02:02:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:38,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:38,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:38,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112079992] [2022-11-03 02:02:38,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112079992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:38,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:38,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:02:38,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628167886] [2022-11-03 02:02:38,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:38,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:38,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:38,922 INFO L87 Difference]: Start difference. First operand 182 states and 273 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:39,000 INFO L93 Difference]: Finished difference Result 448 states and 700 transitions. [2022-11-03 02:02:39,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:39,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2022-11-03 02:02:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:39,003 INFO L225 Difference]: With dead ends: 448 [2022-11-03 02:02:39,004 INFO L226 Difference]: Without dead ends: 297 [2022-11-03 02:02:39,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:39,006 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 82 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:39,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 244 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-03 02:02:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2022-11-03 02:02:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.5442176870748299) internal successors, (454), 294 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 454 transitions. [2022-11-03 02:02:39,072 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 454 transitions. Word has length 42 [2022-11-03 02:02:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:39,072 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 454 transitions. [2022-11-03 02:02:39,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 454 transitions. [2022-11-03 02:02:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:02:39,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:39,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:39,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:02:39,080 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:39,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash -725243457, now seen corresponding path program 1 times [2022-11-03 02:02:39,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:39,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654034628] [2022-11-03 02:02:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:39,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:39,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:39,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654034628] [2022-11-03 02:02:39,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654034628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:39,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:39,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:02:39,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199114005] [2022-11-03 02:02:39,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:39,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:39,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:39,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:39,250 INFO L87 Difference]: Start difference. First operand 295 states and 454 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:39,341 INFO L93 Difference]: Finished difference Result 723 states and 1138 transitions. [2022-11-03 02:02:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:39,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2022-11-03 02:02:39,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:39,347 INFO L225 Difference]: With dead ends: 723 [2022-11-03 02:02:39,348 INFO L226 Difference]: Without dead ends: 459 [2022-11-03 02:02:39,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:39,362 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 81 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:39,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 210 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-03 02:02:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2022-11-03 02:02:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.5592105263157894) internal successors, (711), 456 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 711 transitions. [2022-11-03 02:02:39,432 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 711 transitions. Word has length 44 [2022-11-03 02:02:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:39,433 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 711 transitions. [2022-11-03 02:02:39,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 711 transitions. [2022-11-03 02:02:39,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:02:39,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:39,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:39,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:02:39,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:39,441 INFO L85 PathProgramCache]: Analyzing trace with hash -448509902, now seen corresponding path program 1 times [2022-11-03 02:02:39,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:39,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832867499] [2022-11-03 02:02:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:39,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:39,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:39,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832867499] [2022-11-03 02:02:39,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832867499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:39,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:39,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:02:39,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262510631] [2022-11-03 02:02:39,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:39,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:39,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:39,610 INFO L87 Difference]: Start difference. First operand 457 states and 711 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:39,810 INFO L93 Difference]: Finished difference Result 1175 states and 1862 transitions. [2022-11-03 02:02:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 46 [2022-11-03 02:02:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:39,821 INFO L225 Difference]: With dead ends: 1175 [2022-11-03 02:02:39,821 INFO L226 Difference]: Without dead ends: 762 [2022-11-03 02:02:39,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:39,829 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 77 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:39,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 225 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-03 02:02:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 760. [2022-11-03 02:02:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 1.5691699604743083) internal successors, (1191), 759 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1191 transitions. [2022-11-03 02:02:39,956 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1191 transitions. Word has length 46 [2022-11-03 02:02:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:39,957 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 1191 transitions. [2022-11-03 02:02:39,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1191 transitions. [2022-11-03 02:02:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:02:39,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:39,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:39,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:02:39,966 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1743853951, now seen corresponding path program 1 times [2022-11-03 02:02:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:39,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179606626] [2022-11-03 02:02:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:40,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:40,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179606626] [2022-11-03 02:02:40,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179606626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:40,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:40,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:02:40,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334426839] [2022-11-03 02:02:40,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:40,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:40,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:40,094 INFO L87 Difference]: Start difference. First operand 760 states and 1191 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:40,282 INFO L93 Difference]: Finished difference Result 1902 states and 3012 transitions. [2022-11-03 02:02:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:40,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2022-11-03 02:02:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:40,288 INFO L225 Difference]: With dead ends: 1902 [2022-11-03 02:02:40,289 INFO L226 Difference]: Without dead ends: 1186 [2022-11-03 02:02:40,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:40,291 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 76 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:40,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 212 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-11-03 02:02:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1184. [2022-11-03 02:02:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.5731191885038038) internal successors, (1861), 1183 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1861 transitions. [2022-11-03 02:02:40,439 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1861 transitions. Word has length 48 [2022-11-03 02:02:40,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:40,439 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1861 transitions. [2022-11-03 02:02:40,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1861 transitions. [2022-11-03 02:02:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:02:40,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:40,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:40,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:02:40,441 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:40,441 INFO L85 PathProgramCache]: Analyzing trace with hash -496972498, now seen corresponding path program 1 times [2022-11-03 02:02:40,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:40,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813588628] [2022-11-03 02:02:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:40,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:40,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:40,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813588628] [2022-11-03 02:02:40,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813588628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:40,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:40,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:02:40,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52983767] [2022-11-03 02:02:40,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:40,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:40,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:40,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:40,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:40,617 INFO L87 Difference]: Start difference. First operand 1184 states and 1861 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:41,104 INFO L93 Difference]: Finished difference Result 3012 states and 4750 transitions. [2022-11-03 02:02:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 50 [2022-11-03 02:02:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:41,152 INFO L225 Difference]: With dead ends: 3012 [2022-11-03 02:02:41,152 INFO L226 Difference]: Without dead ends: 1885 [2022-11-03 02:02:41,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:02:41,155 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 460 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:41,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 816 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:02:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2022-11-03 02:02:41,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1875. [2022-11-03 02:02:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5618996798292422) internal successors, (2927), 1874 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2927 transitions. [2022-11-03 02:02:41,385 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2927 transitions. Word has length 50 [2022-11-03 02:02:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:41,385 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2927 transitions. [2022-11-03 02:02:41,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2927 transitions. [2022-11-03 02:02:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 02:02:41,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:41,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:41,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:02:41,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:41,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:41,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1711217546, now seen corresponding path program 1 times [2022-11-03 02:02:41,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:41,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799064242] [2022-11-03 02:02:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:41,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:41,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799064242] [2022-11-03 02:02:41,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799064242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:41,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:41,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:41,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855784829] [2022-11-03 02:02:41,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:41,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:41,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:41,555 INFO L87 Difference]: Start difference. First operand 1875 states and 2927 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:41,900 INFO L93 Difference]: Finished difference Result 3695 states and 5786 transitions. [2022-11-03 02:02:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:02:41,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2022-11-03 02:02:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:41,914 INFO L225 Difference]: With dead ends: 3695 [2022-11-03 02:02:41,915 INFO L226 Difference]: Without dead ends: 1877 [2022-11-03 02:02:41,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:41,918 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 153 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:41,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 302 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-03 02:02:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-03 02:02:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.555496264674493) internal successors, (2915), 1874 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2915 transitions. [2022-11-03 02:02:42,179 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2915 transitions. Word has length 51 [2022-11-03 02:02:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:42,180 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2915 transitions. [2022-11-03 02:02:42,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2915 transitions. [2022-11-03 02:02:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:02:42,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:42,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:42,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:02:42,182 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1450190197, now seen corresponding path program 1 times [2022-11-03 02:02:42,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:42,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498687267] [2022-11-03 02:02:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:42,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:42,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:42,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498687267] [2022-11-03 02:02:42,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498687267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:42,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:42,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:42,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290372053] [2022-11-03 02:02:42,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:42,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:42,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:42,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:42,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:42,306 INFO L87 Difference]: Start difference. First operand 1875 states and 2915 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:42,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:42,601 INFO L93 Difference]: Finished difference Result 3695 states and 5762 transitions. [2022-11-03 02:02:42,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:02:42,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 52 [2022-11-03 02:02:42,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:42,610 INFO L225 Difference]: With dead ends: 3695 [2022-11-03 02:02:42,610 INFO L226 Difference]: Without dead ends: 1877 [2022-11-03 02:02:42,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:42,619 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 161 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:42,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 308 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-03 02:02:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-03 02:02:42,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5490928495197438) internal successors, (2903), 1874 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2903 transitions. [2022-11-03 02:02:42,859 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2903 transitions. Word has length 52 [2022-11-03 02:02:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:42,860 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2903 transitions. [2022-11-03 02:02:42,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2903 transitions. [2022-11-03 02:02:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:02:42,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:42,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:42,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:02:42,861 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:42,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1952834993, now seen corresponding path program 1 times [2022-11-03 02:02:42,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:42,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119186895] [2022-11-03 02:02:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:43,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:43,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119186895] [2022-11-03 02:02:43,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119186895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:43,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:43,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:43,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421585625] [2022-11-03 02:02:43,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:43,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:43,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:43,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:43,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:43,008 INFO L87 Difference]: Start difference. First operand 1875 states and 2903 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:43,274 INFO L93 Difference]: Finished difference Result 3695 states and 5738 transitions. [2022-11-03 02:02:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:02:43,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2022-11-03 02:02:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:43,287 INFO L225 Difference]: With dead ends: 3695 [2022-11-03 02:02:43,288 INFO L226 Difference]: Without dead ends: 1877 [2022-11-03 02:02:43,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:43,292 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 159 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:43,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 311 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:43,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-03 02:02:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-03 02:02:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5426894343649946) internal successors, (2891), 1874 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2891 transitions. [2022-11-03 02:02:43,575 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2891 transitions. Word has length 53 [2022-11-03 02:02:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:43,576 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2891 transitions. [2022-11-03 02:02:43,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:43,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2891 transitions. [2022-11-03 02:02:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:02:43,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:43,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:43,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:02:43,577 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1743591742, now seen corresponding path program 1 times [2022-11-03 02:02:43,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:43,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457668387] [2022-11-03 02:02:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:43,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:43,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:43,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457668387] [2022-11-03 02:02:43,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457668387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:43,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:43,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:02:43,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840677971] [2022-11-03 02:02:43,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:43,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:43,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:43,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:43,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:43,830 INFO L87 Difference]: Start difference. First operand 1875 states and 2891 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:44,169 INFO L93 Difference]: Finished difference Result 3695 states and 5714 transitions. [2022-11-03 02:02:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:02:44,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 55 [2022-11-03 02:02:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:44,177 INFO L225 Difference]: With dead ends: 3695 [2022-11-03 02:02:44,177 INFO L226 Difference]: Without dead ends: 1877 [2022-11-03 02:02:44,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:02:44,181 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 185 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:44,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 297 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-03 02:02:44,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-03 02:02:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.538420490928495) internal successors, (2883), 1874 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2883 transitions. [2022-11-03 02:02:44,429 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2883 transitions. Word has length 55 [2022-11-03 02:02:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:44,430 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2883 transitions. [2022-11-03 02:02:44,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2883 transitions. [2022-11-03 02:02:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 02:02:44,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:44,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:44,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:02:44,432 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2055668249, now seen corresponding path program 1 times [2022-11-03 02:02:44,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:44,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014502306] [2022-11-03 02:02:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:44,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:44,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:44,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014502306] [2022-11-03 02:02:44,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014502306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:44,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:44,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:02:44,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264342853] [2022-11-03 02:02:44,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:44,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:44,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:44,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:44,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:44,647 INFO L87 Difference]: Start difference. First operand 1875 states and 2883 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:45,121 INFO L93 Difference]: Finished difference Result 4716 states and 7241 transitions. [2022-11-03 02:02:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:02:45,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 58 [2022-11-03 02:02:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:45,133 INFO L225 Difference]: With dead ends: 4716 [2022-11-03 02:02:45,133 INFO L226 Difference]: Without dead ends: 2898 [2022-11-03 02:02:45,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:02:45,137 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 244 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:45,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 316 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2022-11-03 02:02:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2896. [2022-11-03 02:02:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 1.5246977547495681) internal successors, (4414), 2895 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4414 transitions. [2022-11-03 02:02:45,557 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4414 transitions. Word has length 58 [2022-11-03 02:02:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:45,557 INFO L495 AbstractCegarLoop]: Abstraction has 2896 states and 4414 transitions. [2022-11-03 02:02:45,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4414 transitions. [2022-11-03 02:02:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 02:02:45,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:45,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:45,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:02:45,560 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash 709545590, now seen corresponding path program 1 times [2022-11-03 02:02:45,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:45,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309636154] [2022-11-03 02:02:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:45,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:45,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:45,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309636154] [2022-11-03 02:02:45,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309636154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:45,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:45,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:02:45,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293568027] [2022-11-03 02:02:45,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:45,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:02:45,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:45,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:02:45,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:02:45,921 INFO L87 Difference]: Start difference. First operand 2896 states and 4414 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:46,587 INFO L93 Difference]: Finished difference Result 3555 states and 5390 transitions. [2022-11-03 02:02:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:02:46,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-03 02:02:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:46,601 INFO L225 Difference]: With dead ends: 3555 [2022-11-03 02:02:46,602 INFO L226 Difference]: Without dead ends: 3553 [2022-11-03 02:02:46,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:02:46,605 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 216 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:46,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 711 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2022-11-03 02:02:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2902. [2022-11-03 02:02:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 1.5215442950706652) internal successors, (4414), 2901 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 4414 transitions. [2022-11-03 02:02:47,054 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 4414 transitions. Word has length 59 [2022-11-03 02:02:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:47,055 INFO L495 AbstractCegarLoop]: Abstraction has 2902 states and 4414 transitions. [2022-11-03 02:02:47,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 4414 transitions. [2022-11-03 02:02:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:02:47,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:47,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:47,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:02:47,063 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:47,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1768604799, now seen corresponding path program 1 times [2022-11-03 02:02:47,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:47,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212797617] [2022-11-03 02:02:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:47,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:02:48,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:48,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212797617] [2022-11-03 02:02:48,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212797617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:48,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372738790] [2022-11-03 02:02:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:48,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:48,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:48,346 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:48,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:02:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:48,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:02:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:02:49,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:49,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372738790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:49,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:02:49,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-03 02:02:49,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11331550] [2022-11-03 02:02:49,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:49,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:49,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:49,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:49,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:49,085 INFO L87 Difference]: Start difference. First operand 2902 states and 4414 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:50,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:50,930 INFO L93 Difference]: Finished difference Result 8379 states and 12782 transitions. [2022-11-03 02:02:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:02:50,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-03 02:02:50,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:50,981 INFO L225 Difference]: With dead ends: 8379 [2022-11-03 02:02:50,981 INFO L226 Difference]: Without dead ends: 5519 [2022-11-03 02:02:50,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:02:50,987 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 428 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:50,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 221 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5519 states. [2022-11-03 02:02:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5519 to 5517. [2022-11-03 02:02:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 1.5143219724438) internal successors, (8353), 5516 states have internal predecessors, (8353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 8353 transitions. [2022-11-03 02:02:52,308 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 8353 transitions. Word has length 67 [2022-11-03 02:02:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:52,308 INFO L495 AbstractCegarLoop]: Abstraction has 5517 states and 8353 transitions. [2022-11-03 02:02:52,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 8353 transitions. [2022-11-03 02:02:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:02:52,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:52,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:52,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:52,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:02:52,526 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:52,527 INFO L85 PathProgramCache]: Analyzing trace with hash 318928394, now seen corresponding path program 1 times [2022-11-03 02:02:52,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:52,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703994679] [2022-11-03 02:02:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:52,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:02:52,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703994679] [2022-11-03 02:02:52,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703994679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:52,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:52,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:52,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111071770] [2022-11-03 02:02:52,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:52,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:52,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:52,712 INFO L87 Difference]: Start difference. First operand 5517 states and 8353 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:54,293 INFO L93 Difference]: Finished difference Result 10998 states and 16667 transitions. [2022-11-03 02:02:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:02:54,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-03 02:02:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:54,308 INFO L225 Difference]: With dead ends: 10998 [2022-11-03 02:02:54,308 INFO L226 Difference]: Without dead ends: 5517 [2022-11-03 02:02:54,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:02:54,315 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 294 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:54,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 103 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5517 states. [2022-11-03 02:02:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5517 to 5517. [2022-11-03 02:02:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 1.4807831762146484) internal successors, (8168), 5516 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 8168 transitions. [2022-11-03 02:02:55,541 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 8168 transitions. Word has length 70 [2022-11-03 02:02:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:55,542 INFO L495 AbstractCegarLoop]: Abstraction has 5517 states and 8168 transitions. [2022-11-03 02:02:55,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 8168 transitions. [2022-11-03 02:02:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:02:55,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:55,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:55,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:02:55,545 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:55,546 INFO L85 PathProgramCache]: Analyzing trace with hash -184116433, now seen corresponding path program 1 times [2022-11-03 02:02:55,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:55,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162219616] [2022-11-03 02:02:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:55,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:02:56,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:56,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162219616] [2022-11-03 02:02:56,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162219616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:56,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119516440] [2022-11-03 02:02:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:56,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:56,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:56,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:56,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:02:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:56,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:02:56,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:02:57,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:57,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119516440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:57,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:02:57,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-03 02:02:57,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791728344] [2022-11-03 02:02:57,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:57,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:57,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:57,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:57,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:57,414 INFO L87 Difference]: Start difference. First operand 5517 states and 8168 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:00,423 INFO L93 Difference]: Finished difference Result 16047 states and 23786 transitions. [2022-11-03 02:03:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:03:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-03 02:03:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:00,455 INFO L225 Difference]: With dead ends: 16047 [2022-11-03 02:03:00,456 INFO L226 Difference]: Without dead ends: 10599 [2022-11-03 02:03:00,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:03:00,465 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 374 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:00,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 234 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:03:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10599 states. [2022-11-03 02:03:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10599 to 10597. [2022-11-03 02:03:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 1.4730086825217064) internal successors, (15608), 10596 states have internal predecessors, (15608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 15608 transitions. [2022-11-03 02:03:02,421 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 15608 transitions. Word has length 70 [2022-11-03 02:03:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:02,421 INFO L495 AbstractCegarLoop]: Abstraction has 10597 states and 15608 transitions. [2022-11-03 02:03:02,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 15608 transitions. [2022-11-03 02:03:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:03:02,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:02,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:02,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:02,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:03:02,651 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash 886657518, now seen corresponding path program 1 times [2022-11-03 02:03:02,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:02,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494974857] [2022-11-03 02:03:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:02,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:03:02,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:02,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494974857] [2022-11-03 02:03:02,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494974857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:02,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:02,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:03:02,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505330044] [2022-11-03 02:03:02,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:02,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:03:02,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:02,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:03:02,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:02,826 INFO L87 Difference]: Start difference. First operand 10597 states and 15608 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:05,422 INFO L93 Difference]: Finished difference Result 21137 states and 31149 transitions. [2022-11-03 02:03:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:03:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-03 02:03:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:05,456 INFO L225 Difference]: With dead ends: 21137 [2022-11-03 02:03:05,456 INFO L226 Difference]: Without dead ends: 10597 [2022-11-03 02:03:05,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:03:05,472 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 278 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:05,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 105 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10597 states. [2022-11-03 02:03:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10597 to 10597. [2022-11-03 02:03:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 1.446583616459041) internal successors, (15328), 10596 states have internal predecessors, (15328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 15328 transitions. [2022-11-03 02:03:07,561 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 15328 transitions. Word has length 73 [2022-11-03 02:03:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:07,562 INFO L495 AbstractCegarLoop]: Abstraction has 10597 states and 15328 transitions. [2022-11-03 02:03:07,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 15328 transitions. [2022-11-03 02:03:07,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:03:07,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:07,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:07,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:03:07,564 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash 530696617, now seen corresponding path program 1 times [2022-11-03 02:03:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:07,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246759609] [2022-11-03 02:03:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:07,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:03:08,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:08,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246759609] [2022-11-03 02:03:08,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246759609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:08,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179748102] [2022-11-03 02:03:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:08,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:08,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:08,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:08,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:03:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:03:09,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:03:09,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:09,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179748102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:09,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:03:09,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-03 02:03:09,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363363414] [2022-11-03 02:03:09,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:09,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:03:09,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:09,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:03:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:03:09,821 INFO L87 Difference]: Start difference. First operand 10597 states and 15328 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:14,038 INFO L93 Difference]: Finished difference Result 31057 states and 44938 transitions. [2022-11-03 02:03:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:03:14,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-03 02:03:14,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:14,094 INFO L225 Difference]: With dead ends: 31057 [2022-11-03 02:03:14,095 INFO L226 Difference]: Without dead ends: 20539 [2022-11-03 02:03:14,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:03:14,109 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 246 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:14,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 289 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:03:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20539 states. [2022-11-03 02:03:18,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20539 to 20537. [2022-11-03 02:03:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20537 states, 20536 states have (on average 1.4392286716010907) internal successors, (29556), 20536 states have internal predecessors, (29556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20537 states to 20537 states and 29556 transitions. [2022-11-03 02:03:18,734 INFO L78 Accepts]: Start accepts. Automaton has 20537 states and 29556 transitions. Word has length 73 [2022-11-03 02:03:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:18,735 INFO L495 AbstractCegarLoop]: Abstraction has 20537 states and 29556 transitions. [2022-11-03 02:03:18,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 20537 states and 29556 transitions. [2022-11-03 02:03:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:03:18,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:18,737 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:18,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:18,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:03:18,950 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:18,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1012531897, now seen corresponding path program 1 times [2022-11-03 02:03:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657216058] [2022-11-03 02:03:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:18,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:03:19,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:19,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657216058] [2022-11-03 02:03:19,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657216058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:19,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123241027] [2022-11-03 02:03:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:19,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:19,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:19,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:19,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:03:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:20,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:03:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:03:20,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:20,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123241027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:20,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:03:20,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2022-11-03 02:03:20,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942515314] [2022-11-03 02:03:20,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:20,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:03:20,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:20,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:03:20,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:03:20,779 INFO L87 Difference]: Start difference. First operand 20537 states and 29556 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:26,896 INFO L93 Difference]: Finished difference Result 39711 states and 56806 transitions. [2022-11-03 02:03:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:03:26,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:03:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:26,979 INFO L225 Difference]: With dead ends: 39711 [2022-11-03 02:03:26,980 INFO L226 Difference]: Without dead ends: 28993 [2022-11-03 02:03:26,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:03:26,999 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 407 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:26,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 387 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:27,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28993 states. [2022-11-03 02:03:31,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28993 to 20559. [2022-11-03 02:03:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20559 states, 20558 states have (on average 1.4390018484288354) internal successors, (29583), 20558 states have internal predecessors, (29583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 29583 transitions. [2022-11-03 02:03:31,658 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 29583 transitions. Word has length 76 [2022-11-03 02:03:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:31,658 INFO L495 AbstractCegarLoop]: Abstraction has 20559 states and 29583 transitions. [2022-11-03 02:03:31,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 29583 transitions. [2022-11-03 02:03:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:03:31,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:31,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:31,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:03:31,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:31,866 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1639058183, now seen corresponding path program 1 times [2022-11-03 02:03:31,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:31,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335911266] [2022-11-03 02:03:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:31,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:03:33,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:33,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335911266] [2022-11-03 02:03:33,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335911266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:33,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184728225] [2022-11-03 02:03:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:33,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:33,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:33,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:33,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:03:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:03:33,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:03:34,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:34,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184728225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:34,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:03:34,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2022-11-03 02:03:34,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969571616] [2022-11-03 02:03:34,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:34,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:03:34,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:34,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:03:34,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:03:34,091 INFO L87 Difference]: Start difference. First operand 20559 states and 29583 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:43,039 INFO L93 Difference]: Finished difference Result 48663 states and 69901 transitions. [2022-11-03 02:03:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:03:43,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:03:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:43,138 INFO L225 Difference]: With dead ends: 48663 [2022-11-03 02:03:43,138 INFO L226 Difference]: Without dead ends: 38145 [2022-11-03 02:03:43,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:03:43,157 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 369 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:43,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 429 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38145 states. [2022-11-03 02:03:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38145 to 30525. [2022-11-03 02:03:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30525 states, 30524 states have (on average 1.426942733586686) internal successors, (43556), 30524 states have internal predecessors, (43556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30525 states to 30525 states and 43556 transitions. [2022-11-03 02:03:50,072 INFO L78 Accepts]: Start accepts. Automaton has 30525 states and 43556 transitions. Word has length 76 [2022-11-03 02:03:50,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:50,073 INFO L495 AbstractCegarLoop]: Abstraction has 30525 states and 43556 transitions. [2022-11-03 02:03:50,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 30525 states and 43556 transitions. [2022-11-03 02:03:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:03:50,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:50,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:50,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 02:03:50,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:50,282 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:50,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1006096199, now seen corresponding path program 1 times [2022-11-03 02:03:50,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:50,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585553903] [2022-11-03 02:03:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:50,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:03:51,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:51,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585553903] [2022-11-03 02:03:51,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585553903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:51,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560048766] [2022-11-03 02:03:51,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:51,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:51,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:51,427 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:51,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e00b0ce-a3d8-4654-ab11-c0f9d7fbbb14/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:03:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:03:51,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:03:52,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:03:57,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560048766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:57,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879664073] [2022-11-03 02:03:57,775 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 02:03:57,775 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:57,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:57,786 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:57,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:58,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:58,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:58,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:03:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:58,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:58,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:58,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 02:03:58,453 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 02:04:07,317 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6