./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:33:04,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:33:04,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:33:04,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:33:04,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:33:04,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:33:04,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:33:04,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:33:04,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:33:04,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:33:04,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:33:04,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:33:04,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:33:04,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:33:04,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:33:04,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:33:04,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:33:04,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:33:04,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:33:04,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:33:04,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:33:04,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:33:04,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:33:04,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:33:04,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:33:04,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:33:04,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:33:04,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:33:04,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:33:04,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:33:04,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:33:04,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:33:04,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:33:04,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:33:04,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:33:04,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:33:04,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:33:04,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:33:04,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:33:04,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:33:04,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:33:04,779 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:33:04,827 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:33:04,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:33:04,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:33:04,832 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:33:04,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:33:04,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:33:04,834 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:33:04,834 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:33:04,835 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:33:04,835 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:33:04,836 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:33:04,837 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:33:04,837 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:33:04,837 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:33:04,837 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:33:04,838 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:33:04,838 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:33:04,838 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:33:04,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:33:04,840 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:33:04,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:33:04,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:33:04,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:33:04,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:33:04,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:33:04,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:33:04,844 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:33:04,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:33:04,844 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:33:04,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:33:04,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:33:04,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:33:04,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:33:04,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:33:04,846 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:33:04,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:33:04,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:33:04,847 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:33:04,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:33:04,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:33:04,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:33:04,848 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_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2022-11-19 06:33:05,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:33:05,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:33:05,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:33:05,255 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:33:05,256 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:33:05,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2022-11-19 06:33:05,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/data/fb1db5bc6/ff850a0895fb424d83b8aff7e31fb15f/FLAG6a47d8f0d [2022-11-19 06:33:06,245 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:33:06,246 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2022-11-19 06:33:06,263 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/data/fb1db5bc6/ff850a0895fb424d83b8aff7e31fb15f/FLAG6a47d8f0d [2022-11-19 06:33:06,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/data/fb1db5bc6/ff850a0895fb424d83b8aff7e31fb15f [2022-11-19 06:33:06,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:33:06,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:33:06,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:33:06,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:33:06,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:33:06,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:06,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180f2259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06, skipping insertion in model container [2022-11-19 06:33:06,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:06,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:33:06,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:33:06,737 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2022-11-19 06:33:06,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:33:06,783 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:33:06,822 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2022-11-19 06:33:06,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:33:06,872 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:33:06,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06 WrapperNode [2022-11-19 06:33:06,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:33:06,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:33:06,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:33:06,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:33:06,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:06,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:06,955 INFO L138 Inliner]: procedures = 125, calls = 83, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 285 [2022-11-19 06:33:06,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:33:06,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:33:06,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:33:06,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:33:06,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:06,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:06,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:06,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:07,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:07,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:07,041 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:07,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:07,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:33:07,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:33:07,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:33:07,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:33:07,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (1/1) ... [2022-11-19 06:33:07,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:33:07,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:33:07,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:33:07,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:33:07,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:33:07,146 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2022-11-19 06:33:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2022-11-19 06:33:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-19 06:33:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-19 06:33:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:33:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:33:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:33:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:33:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 06:33:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:33:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:33:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:33:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:33:07,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:33:07,360 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:33:07,363 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:33:07,925 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:33:08,110 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:33:08,110 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-19 06:33:08,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:33:08 BoogieIcfgContainer [2022-11-19 06:33:08,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:33:08,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:33:08,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:33:08,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:33:08,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:33:06" (1/3) ... [2022-11-19 06:33:08,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf4dfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:33:08, skipping insertion in model container [2022-11-19 06:33:08,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:06" (2/3) ... [2022-11-19 06:33:08,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf4dfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:33:08, skipping insertion in model container [2022-11-19 06:33:08,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:33:08" (3/3) ... [2022-11-19 06:33:08,127 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2022-11-19 06:33:08,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:33:08,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:33:08,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:33:08,238 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;@10312c19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:33:08,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:33:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 61 states have (on average 1.901639344262295) internal successors, (116), 77 states have internal predecessors, (116), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 06:33:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:33:08,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:33:08,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:33:08,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:33:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:33:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash -27349111, now seen corresponding path program 1 times [2022-11-19 06:33:08,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:33:08,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246316250] [2022-11-19 06:33:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:33:08,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:33:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:33:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:33:08,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:33:08,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246316250] [2022-11-19 06:33:08,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246316250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:33:08,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:33:08,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:33:08,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312231239] [2022-11-19 06:33:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:33:08,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 06:33:08,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:33:08,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 06:33:08,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:33:08,531 INFO L87 Difference]: Start difference. First operand has 80 states, 61 states have (on average 1.901639344262295) internal successors, (116), 77 states have internal predecessors, (116), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:33:08,652 INFO L93 Difference]: Finished difference Result 156 states and 287 transitions. [2022-11-19 06:33:08,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 06:33:08,657 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:33:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:33:08,675 INFO L225 Difference]: With dead ends: 156 [2022-11-19 06:33:08,675 INFO L226 Difference]: Without dead ends: 74 [2022-11-19 06:33:08,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:33:08,687 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:33:08,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:33:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-19 06:33:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-19 06:33:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 71 states have internal predecessors, (77), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:33:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-11-19 06:33:08,765 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 6 [2022-11-19 06:33:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:33:08,766 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-11-19 06:33:08,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-11-19 06:33:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:33:08,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:33:08,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:33:08,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:33:08,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:33:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:33:08,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1471689877, now seen corresponding path program 1 times [2022-11-19 06:33:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:33:08,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456872134] [2022-11-19 06:33:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:33:08,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:33:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:33:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:33:08,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:33:08,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456872134] [2022-11-19 06:33:08,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456872134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:33:08,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:33:08,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:33:08,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584630043] [2022-11-19 06:33:08,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:33:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:33:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:33:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:33:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:33:08,920 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:33:09,062 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2022-11-19 06:33:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:33:09,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:33:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:33:09,070 INFO L225 Difference]: With dead ends: 147 [2022-11-19 06:33:09,072 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 06:33:09,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:33:09,076 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:33:09,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:33:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 06:33:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-19 06:33:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 73 states have internal predecessors, (79), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:33:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2022-11-19 06:33:09,099 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 7 [2022-11-19 06:33:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:33:09,101 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2022-11-19 06:33:09,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2022-11-19 06:33:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:33:09,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:33:09,104 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:33:09,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:33:09,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:33:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:33:09,106 INFO L85 PathProgramCache]: Analyzing trace with hash 151165319, now seen corresponding path program 1 times [2022-11-19 06:33:09,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:33:09,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147334173] [2022-11-19 06:33:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:33:09,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:33:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:33:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:33:09,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:33:09,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147334173] [2022-11-19 06:33:09,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147334173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:33:09,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:33:09,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:33:09,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227902162] [2022-11-19 06:33:09,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:33:09,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:33:09,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:33:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:33:09,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:33:09,397 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:33:09,685 INFO L93 Difference]: Finished difference Result 199 states and 260 transitions. [2022-11-19 06:33:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:33:09,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 06:33:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:33:09,688 INFO L225 Difference]: With dead ends: 199 [2022-11-19 06:33:09,688 INFO L226 Difference]: Without dead ends: 194 [2022-11-19 06:33:09,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:33:09,690 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 231 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:33:09,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 183 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:33:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-19 06:33:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 79. [2022-11-19 06:33:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 76 states have internal predecessors, (83), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:33:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2022-11-19 06:33:09,707 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 9 [2022-11-19 06:33:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:33:09,707 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2022-11-19 06:33:09,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2022-11-19 06:33:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:33:09,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:33:09,709 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:33:09,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:33:09,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:33:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:33:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash -195178506, now seen corresponding path program 1 times [2022-11-19 06:33:09,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:33:09,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491058775] [2022-11-19 06:33:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:33:09,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:33:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:33:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:33:09,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:33:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491058775] [2022-11-19 06:33:09,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491058775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:33:09,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:33:09,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:33:09,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523200393] [2022-11-19 06:33:09,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:33:09,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:33:09,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:33:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:33:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:33:09,920 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:33:10,206 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-11-19 06:33:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:33:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 06:33:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:33:10,210 INFO L225 Difference]: With dead ends: 81 [2022-11-19 06:33:10,210 INFO L226 Difference]: Without dead ends: 78 [2022-11-19 06:33:10,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:33:10,212 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 12 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:33:10,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 239 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:33:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-19 06:33:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-19 06:33:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 75 states have internal predecessors, (82), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:33:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2022-11-19 06:33:10,236 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 16 [2022-11-19 06:33:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:33:10,237 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2022-11-19 06:33:10,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2022-11-19 06:33:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:33:10,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:33:10,239 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:33:10,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:33:10,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:33:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:33:10,241 INFO L85 PathProgramCache]: Analyzing trace with hash 130237484, now seen corresponding path program 1 times [2022-11-19 06:33:10,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:33:10,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681907509] [2022-11-19 06:33:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:33:10,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:33:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:33:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:33:10,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:33:10,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681907509] [2022-11-19 06:33:10,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681907509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:33:10,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:33:10,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:33:10,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68200558] [2022-11-19 06:33:10,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:33:10,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:33:10,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:33:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:33:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:33:10,397 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:33:10,689 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2022-11-19 06:33:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:33:10,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 06:33:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:33:10,693 INFO L225 Difference]: With dead ends: 103 [2022-11-19 06:33:10,694 INFO L226 Difference]: Without dead ends: 100 [2022-11-19 06:33:10,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:33:10,695 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 37 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:33:10,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 206 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:33:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-19 06:33:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 77. [2022-11-19 06:33:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 74 states have internal predecessors, (81), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:33:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-11-19 06:33:10,715 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 16 [2022-11-19 06:33:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:33:10,716 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-11-19 06:33:10,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-11-19 06:33:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 06:33:10,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:33:10,717 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:33:10,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:33:10,718 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:33:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:33:10,718 INFO L85 PathProgramCache]: Analyzing trace with hash 642186722, now seen corresponding path program 1 times [2022-11-19 06:33:10,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:33:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236444786] [2022-11-19 06:33:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:33:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:33:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:33:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:33:10,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:33:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236444786] [2022-11-19 06:33:10,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236444786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:33:10,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:33:10,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:33:10,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113428721] [2022-11-19 06:33:10,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:33:10,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:33:10,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:33:10,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:33:10,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:33:10,963 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:33:11,268 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2022-11-19 06:33:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:33:11,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 06:33:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:33:11,271 INFO L225 Difference]: With dead ends: 174 [2022-11-19 06:33:11,271 INFO L226 Difference]: Without dead ends: 171 [2022-11-19 06:33:11,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:33:11,273 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 182 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:33:11,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 190 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:33:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-19 06:33:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 83. [2022-11-19 06:33:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 80 states have internal predecessors, (87), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:33:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-11-19 06:33:11,299 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 19 [2022-11-19 06:33:11,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:33:11,299 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-11-19 06:33:11,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:11,300 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-11-19 06:33:11,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 06:33:11,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:33:11,302 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:33:11,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:33:11,302 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:33:11,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:33:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1429123203, now seen corresponding path program 1 times [2022-11-19 06:33:11,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:33:11,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380860308] [2022-11-19 06:33:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:33:11,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:33:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:33:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:33:11,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:33:11,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380860308] [2022-11-19 06:33:11,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380860308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:33:11,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:33:11,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:33:11,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472948092] [2022-11-19 06:33:11,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:33:11,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:33:11,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:33:11,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:33:11,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:33:11,531 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:33:11,850 INFO L93 Difference]: Finished difference Result 173 states and 214 transitions. [2022-11-19 06:33:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:33:11,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 06:33:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:33:11,853 INFO L225 Difference]: With dead ends: 173 [2022-11-19 06:33:11,853 INFO L226 Difference]: Without dead ends: 170 [2022-11-19 06:33:11,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:33:11,855 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 180 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:33:11,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 190 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:33:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-19 06:33:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 89. [2022-11-19 06:33:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 75 states have (on average 1.24) internal successors, (93), 86 states have internal predecessors, (93), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:33:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-11-19 06:33:11,876 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 19 [2022-11-19 06:33:11,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:33:11,877 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-11-19 06:33:11,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:33:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-11-19 06:33:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 06:33:11,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:33:11,878 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:33:11,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:33:11,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:33:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:33:11,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1434014563, now seen corresponding path program 1 times [2022-11-19 06:33:11,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:33:11,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233531548] [2022-11-19 06:33:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:33:11,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:33:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:33:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:33:12,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:33:12,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233531548] [2022-11-19 06:33:12,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233531548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:33:12,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343291474] [2022-11-19 06:33:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:33:12,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:33:12,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:33:12,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:33:12,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e99d8aed-9691-425c-b41b-a7987cabdae3/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:33:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:33:12,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 06:33:12,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:33:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:12,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-19 06:33:12,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:12,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-19 06:33:12,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 06:33:12,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 06:33:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:33:12,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:33:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:33:12,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343291474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:33:12,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930726993] [2022-11-19 06:33:12,954 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 06:33:12,954 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:33:12,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:33:12,966 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:33:12,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:33:13,194 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 06:33:13,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2022-11-19 06:33:13,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:13,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:13,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2022-11-19 06:33:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:13,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2022-11-19 06:33:13,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 06:33:13,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:13,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:13,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 37 [2022-11-19 06:33:13,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-11-19 06:33:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:14,401 INFO L321 Elim1Store]: treesize reduction 149, result has 40.4 percent of original size [2022-11-19 06:33:14,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 260 treesize of output 331 [2022-11-19 06:33:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:15,153 INFO L321 Elim1Store]: treesize reduction 149, result has 40.4 percent of original size [2022-11-19 06:33:15,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 246 treesize of output 317 [2022-11-19 06:33:15,414 INFO L321 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-19 06:33:15,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 225 treesize of output 215 [2022-11-19 06:33:16,290 INFO L321 Elim1Store]: treesize reduction 200, result has 30.6 percent of original size [2022-11-19 06:33:16,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 221 treesize of output 289 [2022-11-19 06:33:16,649 INFO L321 Elim1Store]: treesize reduction 78, result has 29.7 percent of original size [2022-11-19 06:33:16,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 203 treesize of output 234 [2022-11-19 06:33:16,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:16,957 INFO L321 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2022-11-19 06:33:16,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 236 [2022-11-19 06:33:17,109 INFO L321 Elim1Store]: treesize reduction 65, result has 20.7 percent of original size [2022-11-19 06:33:17,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 255 treesize of output 242 [2022-11-19 06:33:17,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:33:17,532 INFO L321 Elim1Store]: treesize reduction 195, result has 27.8 percent of original size [2022-11-19 06:33:17,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 98 treesize of output 161 [2022-11-19 06:33:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:33:17,915 INFO L321 Elim1Store]: treesize reduction 195, result has 27.8 percent of original size [2022-11-19 06:33:17,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 98 treesize of output 161 [2022-11-19 06:35:55,182 WARN L233 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 464 DAG size of output: 464 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 06:40:14,841 WARN L233 SmtUtils]: Spent 11.89s on a formula simplification. DAG size of input: 701 DAG size of output: 701 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 06:44:36,259 WARN L233 SmtUtils]: Spent 17.86s on a formula simplification that was a NOOP. DAG size: 858 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 06:44:53,883 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 859 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)