./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.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_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/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_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/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_2aeede91-5483-486b-86d8-1eb5cfc7140f/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 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- 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 07:54:07,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:54:07,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:54:07,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:54:07,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:54:07,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:54:07,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:54:07,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:54:07,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:54:07,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:54:07,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:54:07,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:54:07,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:54:07,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:54:07,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:54:07,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:54:07,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:54:07,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:54:07,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:54:07,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:54:07,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:54:07,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:54:07,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:54:07,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:54:07,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:54:07,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:54:07,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:54:07,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:54:07,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:54:07,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:54:07,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:54:07,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:54:07,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:54:07,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:54:07,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:54:07,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:54:07,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:54:07,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:54:07,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:54:07,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:54:07,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:54:07,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:54:07,997 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:54:07,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:54:07,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:54:07,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:54:07,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:54:08,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:54:08,000 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:54:08,000 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:54:08,000 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:54:08,001 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:54:08,001 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:54:08,001 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:54:08,002 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:54:08,002 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:54:08,002 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:54:08,002 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:54:08,003 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:54:08,003 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:54:08,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:54:08,004 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:54:08,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:54:08,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:54:08,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:54:08,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:54:08,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:54:08,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:54:08,006 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:54:08,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:54:08,006 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:54:08,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:54:08,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:54:08,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:54:08,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:54:08,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:54:08,008 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:54:08,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:54:08,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:54:08,009 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:54:08,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:54:08,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:54:08,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:54:08,010 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_2aeede91-5483-486b-86d8-1eb5cfc7140f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2022-11-19 07:54:08,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:54:08,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:54:08,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:54:08,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:54:08,309 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:54:08,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2022-11-19 07:54:08,389 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/data/56e7fbc1f/2dbc3a85dfb54109bda47de4c76c1df2/FLAGb2c149fed [2022-11-19 07:54:08,926 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:54:08,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2022-11-19 07:54:08,938 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/data/56e7fbc1f/2dbc3a85dfb54109bda47de4c76c1df2/FLAGb2c149fed [2022-11-19 07:54:09,306 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/data/56e7fbc1f/2dbc3a85dfb54109bda47de4c76c1df2 [2022-11-19 07:54:09,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:54:09,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:54:09,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:54:09,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:54:09,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:54:09,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44439125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09, skipping insertion in model container [2022-11-19 07:54:09,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:54:09,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:54:09,551 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_2aeede91-5483-486b-86d8-1eb5cfc7140f/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2022-11-19 07:54:09,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:54:09,577 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:54:09,590 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_2aeede91-5483-486b-86d8-1eb5cfc7140f/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2022-11-19 07:54:09,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:54:09,611 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:54:09,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09 WrapperNode [2022-11-19 07:54:09,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:54:09,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:54:09,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:54:09,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:54:09,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,644 INFO L138 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2022-11-19 07:54:09,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:54:09,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:54:09,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:54:09,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:54:09,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,690 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:54:09,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:54:09,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:54:09,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:54:09,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (1/1) ... [2022-11-19 07:54:09,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:54:09,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:09,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:54:09,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:54:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:54:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:54:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:54:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:54:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:54:09,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:54:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:54:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:54:09,865 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:54:09,867 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:54:10,091 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:54:10,145 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:54:10,159 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 07:54:10,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:10 BoogieIcfgContainer [2022-11-19 07:54:10,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:54:10,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:54:10,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:54:10,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:54:10,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:09" (1/3) ... [2022-11-19 07:54:10,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b660e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:10, skipping insertion in model container [2022-11-19 07:54:10,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:09" (2/3) ... [2022-11-19 07:54:10,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b660e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:10, skipping insertion in model container [2022-11-19 07:54:10,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:10" (3/3) ... [2022-11-19 07:54:10,186 INFO L112 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2022-11-19 07:54:10,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:54:10,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:54:10,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:54:10,273 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;@108714ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:54:10,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:54:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-11-19 07:54:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:54:10,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:10,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:10,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 721191376, now seen corresponding path program 1 times [2022-11-19 07:54:10,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:10,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988013376] [2022-11-19 07:54:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:10,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:10,599 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 07:54:10,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:10,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988013376] [2022-11-19 07:54:10,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988013376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:54:10,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:54:10,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:54:10,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690099503] [2022-11-19 07:54:10,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:54:10,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:54:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:54:10,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:54:10,651 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-19 07:54:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:10,732 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-19 07:54:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:54:10,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-11-19 07:54:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:10,744 INFO L225 Difference]: With dead ends: 27 [2022-11-19 07:54:10,745 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 07:54:10,757 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 [2022-11-19 07:54:10,762 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:10,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:54:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 07:54:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 11. [2022-11-19 07:54:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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) [2022-11-19 07:54:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-11-19 07:54:10,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2022-11-19 07:54:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:10,807 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-19 07:54:10,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-19 07:54:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-11-19 07:54:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:54:10,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:10,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:10,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:54:10,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash 801657582, now seen corresponding path program 1 times [2022-11-19 07:54:10,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:10,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879992284] [2022-11-19 07:54:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:10,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:54:10,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879992284] [2022-11-19 07:54:10,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879992284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:10,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843474391] [2022-11-19 07:54:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:10,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:10,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:10,914 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:10,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:54:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:54:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:54:11,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:54:11,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843474391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:54:11,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:54:11,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-19 07:54:11,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743848527] [2022-11-19 07:54:11,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:54:11,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:54:11,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:54:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:54:11,088 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-19 07:54:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:11,112 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2022-11-19 07:54:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:54:11,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-11-19 07:54:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:11,116 INFO L225 Difference]: With dead ends: 21 [2022-11-19 07:54:11,116 INFO L226 Difference]: Without dead ends: 12 [2022-11-19 07:54:11,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:54:11,122 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:11,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:54:11,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-19 07:54:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-19 07:54:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-11-19 07:54:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-19 07:54:11,131 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-19 07:54:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:11,131 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-19 07:54:11,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-19 07:54:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-19 07:54:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:54:11,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:11,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:11,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:54:11,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-19 07:54:11,339 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash -299864784, now seen corresponding path program 1 times [2022-11-19 07:54:11,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:11,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904188534] [2022-11-19 07:54:11,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:11,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:54:11,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904188534] [2022-11-19 07:54:11,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904188534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:11,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86318729] [2022-11-19 07:54:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:11,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:11,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:11,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:11,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:54:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:11,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:54:11,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:54:11,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:54:11,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86318729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8641562] [2022-11-19 07:54:11,650 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:54:11,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:11,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:11,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:11,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:11,780 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:11,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:11,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:11,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:54:11,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:11,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:54:12,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:12,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:12,057 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:12,058 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 228 treesize of output 227 [2022-11-19 07:54:12,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:12,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:12,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:12,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:12,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:12,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-19 07:54:12,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938229296] [2022-11-19 07:54:12,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:12,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:54:12,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:54:12,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:54:12,834 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2022-11-19 07:54:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:12,883 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-11-19 07:54:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:54:12,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 9 [2022-11-19 07:54:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:12,887 INFO L225 Difference]: With dead ends: 39 [2022-11-19 07:54:12,887 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 07:54:12,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:54:12,889 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:12,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:54:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 07:54:12,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 16. [2022-11-19 07:54:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-11-19 07:54:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-19 07:54:12,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-11-19 07:54:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:12,895 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-19 07:54:12,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2022-11-19 07:54:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-19 07:54:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:54:12,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:12,896 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:12,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:54:13,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:13,101 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:13,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash 751908112, now seen corresponding path program 2 times [2022-11-19 07:54:13,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908436168] [2022-11-19 07:54:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:13,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:54:13,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:13,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908436168] [2022-11-19 07:54:13,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908436168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:13,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880547526] [2022-11-19 07:54:13,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:54:13,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:13,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:13,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:13,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:54:13,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:54:13,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:13,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:54:13,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:54:13,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:54:13,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880547526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:13,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1877090754] [2022-11-19 07:54:13,315 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:54:13,315 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:13,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:13,315 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:13,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:13,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:13,350 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:13,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:13,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:13,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:54:13,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:13,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:54:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:13,515 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:54:13,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 226 [2022-11-19 07:54:13,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:13,702 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:13,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '357#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:13,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:13,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:13,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-19 07:54:13,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683813734] [2022-11-19 07:54:13,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:13,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:54:13,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:54:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:54:13,985 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2022-11-19 07:54:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:14,048 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-11-19 07:54:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:54:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 13 [2022-11-19 07:54:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:14,050 INFO L225 Difference]: With dead ends: 63 [2022-11-19 07:54:14,050 INFO L226 Difference]: Without dead ends: 56 [2022-11-19 07:54:14,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:54:14,051 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:14,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 35 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:54:14,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-19 07:54:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 20. [2022-11-19 07:54:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2022-11-19 07:54:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-19 07:54:14,057 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2022-11-19 07:54:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:14,057 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-19 07:54:14,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2022-11-19 07:54:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-19 07:54:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:54:14,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:14,058 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:14,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:14,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:14,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1111495536, now seen corresponding path program 3 times [2022-11-19 07:54:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:14,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042478003] [2022-11-19 07:54:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:14,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:54:14,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:14,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042478003] [2022-11-19 07:54:14,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042478003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:14,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152255539] [2022-11-19 07:54:14,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:54:14,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:14,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:14,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:14,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:54:14,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:54:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:54:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:54:14,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:54:14,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152255539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:14,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [484900267] [2022-11-19 07:54:14,749 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:54:14,749 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:14,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:14,750 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:14,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:14,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:14,790 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:14,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:14,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:14,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:54:14,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:14,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:54:14,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:14,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:14,940 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:14,940 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 228 treesize of output 227 [2022-11-19 07:54:15,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:15,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:15,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '593#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:15,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:15,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:15,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2022-11-19 07:54:15,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045916048] [2022-11-19 07:54:15,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:15,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:54:15,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:15,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:54:15,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:54:15,508 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2022-11-19 07:54:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:15,622 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-11-19 07:54:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:54:15,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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 17 [2022-11-19 07:54:15,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:15,624 INFO L225 Difference]: With dead ends: 90 [2022-11-19 07:54:15,624 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 07:54:15,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:54:15,625 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 161 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:15,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 55 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:54:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 07:54:15,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 27. [2022-11-19 07:54:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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) [2022-11-19 07:54:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-19 07:54:15,631 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-11-19 07:54:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:15,632 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-19 07:54:15,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2022-11-19 07:54:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-19 07:54:15,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:54:15,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:15,633 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:15,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:15,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:15,839 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:15,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1942026478, now seen corresponding path program 4 times [2022-11-19 07:54:15,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:15,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119492641] [2022-11-19 07:54:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:15,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:54:16,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:16,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119492641] [2022-11-19 07:54:16,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119492641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:16,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079796630] [2022-11-19 07:54:16,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:54:16,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:16,086 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:16,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:54:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:16,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:54:16,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:54:16,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:54:16,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079796630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:16,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499227588] [2022-11-19 07:54:16,742 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:54:16,742 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:16,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:16,743 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:16,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:16,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:16,783 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:54:16,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:54:16,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:16,820 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:16,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:16,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:16,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:54:16,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:16,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:16,951 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:16,952 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 228 treesize of output 227 [2022-11-19 07:54:17,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:17,207 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:17,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '940#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:17,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:17,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:17,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 32 [2022-11-19 07:54:17,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626882425] [2022-11-19 07:54:17,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:17,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 07:54:17,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:17,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 07:54:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:54:17,512 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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) [2022-11-19 07:54:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:17,650 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2022-11-19 07:54:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:54:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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 24 [2022-11-19 07:54:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:17,652 INFO L225 Difference]: With dead ends: 111 [2022-11-19 07:54:17,652 INFO L226 Difference]: Without dead ends: 96 [2022-11-19 07:54:17,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:54:17,654 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 147 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:17,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 60 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:54:17,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-19 07:54:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 40. [2022-11-19 07:54:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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) [2022-11-19 07:54:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-11-19 07:54:17,661 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2022-11-19 07:54:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:17,661 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-11-19 07:54:17,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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) [2022-11-19 07:54:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-11-19 07:54:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:54:17,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:17,663 INFO L195 NwaCegarLoop]: trace histogram [22, 8, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:17,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:17,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:54:17,869 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:17,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1369821680, now seen corresponding path program 5 times [2022-11-19 07:54:17,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:17,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603394456] [2022-11-19 07:54:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:17,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 07:54:18,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:18,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603394456] [2022-11-19 07:54:18,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603394456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:18,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498516118] [2022-11-19 07:54:18,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:54:18,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:18,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:18,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:18,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:54:18,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:54:18,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:54:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 07:54:18,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 07:54:18,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498516118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [658604471] [2022-11-19 07:54:18,429 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:54:18,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:18,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:18,431 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:18,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:18,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:18,465 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:54:18,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:54:18,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:18,495 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:18,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:18,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:54:18,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:18,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:18,611 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:18,612 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 228 treesize of output 227 [2022-11-19 07:54:18,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:18,838 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:19,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1416#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:19,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:19,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:19,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-19 07:54:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346709115] [2022-11-19 07:54:19,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:19,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:54:19,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:54:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=365, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:54:19,117 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-11-19 07:54:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:19,296 INFO L93 Difference]: Finished difference Result 177 states and 208 transitions. [2022-11-19 07:54:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:54:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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 37 [2022-11-19 07:54:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:19,298 INFO L225 Difference]: With dead ends: 177 [2022-11-19 07:54:19,298 INFO L226 Difference]: Without dead ends: 170 [2022-11-19 07:54:19,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=365, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:54:19,300 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 273 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:19,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 90 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:54:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-19 07:54:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 50. [2022-11-19 07:54:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 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) [2022-11-19 07:54:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-11-19 07:54:19,310 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 37 [2022-11-19 07:54:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:19,311 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-11-19 07:54:19,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-11-19 07:54:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-11-19 07:54:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:54:19,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:19,320 INFO L195 NwaCegarLoop]: trace histogram [22, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:19,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 07:54:19,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 07:54:19,526 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:19,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash 190263504, now seen corresponding path program 6 times [2022-11-19 07:54:19,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:19,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560104316] [2022-11-19 07:54:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:19,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 07:54:20,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:20,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560104316] [2022-11-19 07:54:20,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560104316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:20,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331276604] [2022-11-19 07:54:20,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:54:20,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:20,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:20,126 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:20,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:54:20,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:54:20,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:20,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:54:20,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-19 07:54:20,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-19 07:54:22,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331276604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:22,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341703516] [2022-11-19 07:54:22,066 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:54:22,067 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:22,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:22,067 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:22,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:22,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:22,102 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:54:22,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:54:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:22,129 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:22,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:22,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:22,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:54:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:22,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:22,273 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:22,273 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 228 treesize of output 227 [2022-11-19 07:54:22,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:22,484 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:22,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2096#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:22,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:22,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:22,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 67 [2022-11-19 07:54:22,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681329601] [2022-11-19 07:54:22,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:22,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-19 07:54:22,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-19 07:54:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1412, Invalid=3700, Unknown=0, NotChecked=0, Total=5112 [2022-11-19 07:54:22,863 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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) [2022-11-19 07:54:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:23,124 INFO L93 Difference]: Finished difference Result 234 states and 283 transitions. [2022-11-19 07:54:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-19 07:54:23,124 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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 47 [2022-11-19 07:54:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:23,125 INFO L225 Difference]: With dead ends: 234 [2022-11-19 07:54:23,126 INFO L226 Difference]: Without dead ends: 208 [2022-11-19 07:54:23,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1412, Invalid=3700, Unknown=0, NotChecked=0, Total=5112 [2022-11-19 07:54:23,128 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 406 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:23,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 115 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:54:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-19 07:54:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 75. [2022-11-19 07:54:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 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) [2022-11-19 07:54:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-19 07:54:23,140 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 47 [2022-11-19 07:54:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:23,140 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-19 07:54:23,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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) [2022-11-19 07:54:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-19 07:54:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:54:23,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:23,142 INFO L195 NwaCegarLoop]: trace histogram [46, 19, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:23,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:23,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:23,355 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:23,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1442170606, now seen corresponding path program 7 times [2022-11-19 07:54:23,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:23,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416137511] [2022-11-19 07:54:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:23,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-19 07:54:24,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:24,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416137511] [2022-11-19 07:54:24,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416137511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:24,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767424342] [2022-11-19 07:54:24,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:54:24,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:24,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:24,168 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:24,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:54:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:24,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 07:54:24,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-19 07:54:26,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-19 07:54:30,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767424342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:30,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [668321972] [2022-11-19 07:54:30,158 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:54:30,158 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:30,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:30,158 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:30,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:30,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:30,189 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:54:30,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:54:30,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:30,226 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:30,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:30,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:30,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:54:30,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:30,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:30,341 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:30,341 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 228 treesize of output 227 [2022-11-19 07:54:30,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:30,553 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:31,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3127#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:31,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:31,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:31,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 48, 48] total 116 [2022-11-19 07:54:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293135893] [2022-11-19 07:54:31,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:31,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-19 07:54:31,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:31,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-19 07:54:31,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4868, Invalid=9652, Unknown=0, NotChecked=0, Total=14520 [2022-11-19 07:54:31,019 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:31,399 INFO L93 Difference]: Finished difference Result 291 states and 365 transitions. [2022-11-19 07:54:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-19 07:54:31,400 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-19 07:54:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:31,402 INFO L225 Difference]: With dead ends: 291 [2022-11-19 07:54:31,402 INFO L226 Difference]: Without dead ends: 264 [2022-11-19 07:54:31,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2635 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4868, Invalid=9652, Unknown=0, NotChecked=0, Total=14520 [2022-11-19 07:54:31,406 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 357 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:31,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 140 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:54:31,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-19 07:54:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 124. [2022-11-19 07:54:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-11-19 07:54:31,422 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 72 [2022-11-19 07:54:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:31,423 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-11-19 07:54:31,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-11-19 07:54:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:54:31,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:31,425 INFO L195 NwaCegarLoop]: trace histogram [94, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:31,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:31,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:31,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash 592374672, now seen corresponding path program 8 times [2022-11-19 07:54:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:31,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021247164] [2022-11-19 07:54:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:31,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4675 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-19 07:54:32,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:32,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021247164] [2022-11-19 07:54:32,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021247164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:32,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282126087] [2022-11-19 07:54:32,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:54:32,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:32,848 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:32,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:54:33,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 07:54:33,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:54:33,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4675 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-19 07:54:33,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4675 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-19 07:54:34,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282126087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:34,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045216819] [2022-11-19 07:54:34,086 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:54:34,086 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:34,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:34,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:34,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:34,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:34,119 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:34,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:34,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:54:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:34,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:54:34,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:34,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:34,258 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:34,259 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 228 treesize of output 227 [2022-11-19 07:54:34,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:34,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:34,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4587#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:34,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:34,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:34,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-19 07:54:34,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322882081] [2022-11-19 07:54:34,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:34,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:54:34,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:34,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:54:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=1313, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 07:54:34,729 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 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) [2022-11-19 07:54:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:35,220 INFO L93 Difference]: Finished difference Result 441 states and 508 transitions. [2022-11-19 07:54:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 07:54:35,221 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 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 121 [2022-11-19 07:54:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:35,223 INFO L225 Difference]: With dead ends: 441 [2022-11-19 07:54:35,224 INFO L226 Difference]: Without dead ends: 434 [2022-11-19 07:54:35,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1137, Invalid=1313, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 07:54:35,225 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 966 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:35,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 210 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:54:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-19 07:54:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 146. [2022-11-19 07:54:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 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) [2022-11-19 07:54:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-11-19 07:54:35,242 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 121 [2022-11-19 07:54:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:35,243 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-11-19 07:54:35,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 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) [2022-11-19 07:54:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-11-19 07:54:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:54:35,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:35,245 INFO L195 NwaCegarLoop]: trace histogram [94, 42, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:35,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:35,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:54:35,456 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash -409594672, now seen corresponding path program 9 times [2022-11-19 07:54:35,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:35,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693924851] [2022-11-19 07:54:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:35,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-19 07:54:37,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:37,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693924851] [2022-11-19 07:54:37,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693924851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:37,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352433071] [2022-11-19 07:54:37,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:54:37,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:37,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:37,992 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:37,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:54:38,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:54:38,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:38,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-19 07:54:38,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-11-19 07:54:45,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-11-19 07:54:59,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352433071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:59,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427051500] [2022-11-19 07:54:59,436 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:54:59,436 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:59,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:59,437 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:59,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:59,466 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:54:59,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:54:59,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:59,490 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:59,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:59,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:59,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:54:59,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:59,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:59,620 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:54:59,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 226 [2022-11-19 07:54:59,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:54:59,773 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:55:00,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6587#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:55:00,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:55:00,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:55:00,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 96, 96] total 235 [2022-11-19 07:55:00,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355082040] [2022-11-19 07:55:00,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:55:00,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2022-11-19 07:55:00,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2022-11-19 07:55:00,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19472, Invalid=37888, Unknown=0, NotChecked=0, Total=57360 [2022-11-19 07:55:00,491 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 235 states, 235 states have (on average 1.0382978723404255) internal successors, (244), 235 states have internal predecessors, (244), 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) [2022-11-19 07:55:01,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:01,697 INFO L93 Difference]: Finished difference Result 594 states and 739 transitions. [2022-11-19 07:55:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-11-19 07:55:01,698 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 1.0382978723404255) internal successors, (244), 235 states have internal predecessors, (244), 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 143 [2022-11-19 07:55:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:01,700 INFO L225 Difference]: With dead ends: 594 [2022-11-19 07:55:01,700 INFO L226 Difference]: Without dead ends: 544 [2022-11-19 07:55:01,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9733 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=19472, Invalid=37888, Unknown=0, NotChecked=0, Total=57360 [2022-11-19 07:55:01,707 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1162 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:01,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 250 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:55:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-11-19 07:55:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 243. [2022-11-19 07:55:01,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 242 states have internal predecessors, (246), 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) [2022-11-19 07:55:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2022-11-19 07:55:01,730 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 143 [2022-11-19 07:55:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:01,730 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2022-11-19 07:55:01,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 1.0382978723404255) internal successors, (244), 235 states have internal predecessors, (244), 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) [2022-11-19 07:55:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2022-11-19 07:55:01,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-19 07:55:01,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:01,736 INFO L195 NwaCegarLoop]: trace histogram [190, 43, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:01,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:01,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:55:01,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:01,937 INFO L85 PathProgramCache]: Analyzing trace with hash -427545618, now seen corresponding path program 10 times [2022-11-19 07:55:01,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:01,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898104083] [2022-11-19 07:55:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:01,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 19091 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-11-19 07:55:05,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:05,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898104083] [2022-11-19 07:55:05,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898104083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:55:05,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848331362] [2022-11-19 07:55:05,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:55:05,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:05,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:55:05,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:55:05,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:55:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 194 conjunts are in the unsatisfiable core [2022-11-19 07:55:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19091 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-11-19 07:55:27,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19091 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-11-19 07:56:22,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848331362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:22,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620663128] [2022-11-19 07:56:22,480 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:56:22,480 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:56:22,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:56:22,481 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:56:22,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:56:22,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:22,511 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:56:22,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:56:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:22,540 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:56:22,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:56:22,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:22,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:56:22,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:22,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:56:22,646 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:56:22,647 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 228 treesize of output 227 [2022-11-19 07:56:22,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:56:22,830 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:56:23,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9850#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:56:23,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:56:23,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:56:23,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 192, 192] total 428 [2022-11-19 07:56:23,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964189472] [2022-11-19 07:56:23,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:23,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 428 states [2022-11-19 07:56:23,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:23,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 428 interpolants. [2022-11-19 07:56:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74720, Invalid=112336, Unknown=0, NotChecked=0, Total=187056 [2022-11-19 07:56:23,999 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 428 states, 428 states have (on average 1.0210280373831775) internal successors, (437), 428 states have internal predecessors, (437), 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) [2022-11-19 07:56:27,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:27,690 INFO L93 Difference]: Finished difference Result 795 states and 1037 transitions. [2022-11-19 07:56:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 428 states. [2022-11-19 07:56:27,691 INFO L78 Accepts]: Start accepts. Automaton has has 428 states, 428 states have (on average 1.0210280373831775) internal successors, (437), 428 states have internal predecessors, (437), 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 240 [2022-11-19 07:56:27,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:27,693 INFO L225 Difference]: With dead ends: 795 [2022-11-19 07:56:27,694 INFO L226 Difference]: Without dead ends: 744 [2022-11-19 07:56:27,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19627 ImplicationChecksByTransitivity, 77.0s TimeCoverageRelationStatistics Valid=74720, Invalid=112336, Unknown=0, NotChecked=0, Total=187056 [2022-11-19 07:56:27,702 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1330 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:27,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1330 Valid, 270 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:56:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-11-19 07:56:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 436. [2022-11-19 07:56:27,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.0091954022988505) internal successors, (439), 435 states have internal predecessors, (439), 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) [2022-11-19 07:56:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 439 transitions. [2022-11-19 07:56:27,738 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 439 transitions. Word has length 240 [2022-11-19 07:56:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:27,740 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 439 transitions. [2022-11-19 07:56:27,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 428 states, 428 states have (on average 1.0210280373831775) internal successors, (437), 428 states have internal predecessors, (437), 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) [2022-11-19 07:56:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 439 transitions. [2022-11-19 07:56:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-19 07:56:27,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:27,758 INFO L195 NwaCegarLoop]: trace histogram [382, 44, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:27,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:27,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:27,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1080218768, now seen corresponding path program 11 times [2022-11-19 07:56:27,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:27,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217084938] [2022-11-19 07:56:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:27,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 74143 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-19 07:56:33,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:33,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217084938] [2022-11-19 07:56:33,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217084938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:56:33,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377969508] [2022-11-19 07:56:33,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:56:33,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:33,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:56:33,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:56:50,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-19 07:56:50,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:56:50,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 07:56:50,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 74143 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-19 07:56:50,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 74143 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-19 07:56:53,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377969508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:53,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469001325] [2022-11-19 07:56:53,177 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:56:53,177 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:56:53,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:56:53,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:56:53,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:56:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:53,202 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:56:53,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:56:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:53,225 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:56:53,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:56:53,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:53,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:56:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:53,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:56:53,328 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:56:53,328 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 228 treesize of output 227 [2022-11-19 07:56:53,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 07:56:53,515 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:56:53,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14718#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:56:53,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:56:53,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:56:53,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-19 07:56:53,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72461711] [2022-11-19 07:56:53,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:53,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-19 07:56:53,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-19 07:56:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4569, Invalid=4937, Unknown=0, NotChecked=0, Total=9506 [2022-11-19 07:56:53,819 INFO L87 Difference]: Start difference. First operand 436 states and 439 transitions. Second operand has 93 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 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) [2022-11-19 07:56:56,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:56,293 INFO L93 Difference]: Finished difference Result 1113 states and 1252 transitions. [2022-11-19 07:56:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-19 07:56:56,294 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 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 433 [2022-11-19 07:56:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:56,300 INFO L225 Difference]: With dead ends: 1113 [2022-11-19 07:56:56,300 INFO L226 Difference]: Without dead ends: 1106 [2022-11-19 07:56:56,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1344 GetRequests, 1248 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4569, Invalid=4937, Unknown=0, NotChecked=0, Total=9506 [2022-11-19 07:56:56,302 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2569 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:56,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2569 Valid, 450 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:56:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-11-19 07:56:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 482. [2022-11-19 07:56:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.0083160083160083) internal successors, (485), 481 states have internal predecessors, (485), 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) [2022-11-19 07:56:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 485 transitions. [2022-11-19 07:56:56,340 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 485 transitions. Word has length 433 [2022-11-19 07:56:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:56,340 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 485 transitions. [2022-11-19 07:56:56,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 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) [2022-11-19 07:56:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 485 transitions. [2022-11-19 07:56:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-11-19 07:56:56,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:56,351 INFO L195 NwaCegarLoop]: trace histogram [382, 90, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:56,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:56,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:56:56,552 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash 155912912, now seen corresponding path program 12 times [2022-11-19 07:56:56,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:56,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878284011] [2022-11-19 07:56:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:56,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 77248 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-19 07:57:06,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878284011] [2022-11-19 07:57:06,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878284011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:57:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460600530] [2022-11-19 07:57:06,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:57:06,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:06,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:06,992 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:06,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:57:08,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:57:08,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:57:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 3865 conjuncts, 386 conjunts are in the unsatisfiable core [2022-11-19 07:57:08,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 77248 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2022-11-19 07:58:32,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 77248 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2022-11-19 08:02:14,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460600530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:14,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549722483] [2022-11-19 08:02:14,264 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 08:02:14,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:02:14,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:02:14,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:02:14,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:02:14,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:14,299 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:02:14,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 08:02:14,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:14,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:02:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:14,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:02:14,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:14,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:14,435 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:02:14,435 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 228 treesize of output 227 [2022-11-19 08:02:14,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:02:14,618 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:02:16,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21086#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:02:16,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:02:16,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:02:16,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 384, 384] total 859 [2022-11-19 08:02:16,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249269243] [2022-11-19 08:02:16,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:02:16,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 859 states [2022-11-19 08:02:16,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 859 interpolants. [2022-11-19 08:02:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299096, Invalid=446536, Unknown=0, NotChecked=0, Total=745632 [2022-11-19 08:02:16,964 INFO L87 Difference]: Start difference. First operand 482 states and 485 transitions. Second operand has 859 states, 859 states have (on average 1.010477299185099) internal successors, (868), 859 states have internal predecessors, (868), 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) [2022-11-19 08:02:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:47,363 INFO L93 Difference]: Finished difference Result 1602 states and 2083 transitions. [2022-11-19 08:02:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 859 states. [2022-11-19 08:02:47,364 INFO L78 Accepts]: Start accepts. Automaton has has 859 states, 859 states have (on average 1.010477299185099) internal successors, (868), 859 states have internal predecessors, (868), 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 479 [2022-11-19 08:02:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:47,369 INFO L225 Difference]: With dead ends: 1602 [2022-11-19 08:02:47,369 INFO L226 Difference]: Without dead ends: 1504 [2022-11-19 08:02:47,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 862 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75397 ImplicationChecksByTransitivity, 309.5s TimeCoverageRelationStatistics Valid=299096, Invalid=446536, Unknown=0, NotChecked=0, Total=745632 [2022-11-19 08:02:47,422 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2436 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:47,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2436 Valid, 515 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 08:02:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-11-19 08:02:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 867. [2022-11-19 08:02:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 1.0046189376443417) internal successors, (870), 866 states have internal predecessors, (870), 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) [2022-11-19 08:02:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 870 transitions. [2022-11-19 08:02:47,504 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 870 transitions. Word has length 479 [2022-11-19 08:02:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:47,505 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 870 transitions. [2022-11-19 08:02:47,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 859 states, 859 states have (on average 1.010477299185099) internal successors, (868), 859 states have internal predecessors, (868), 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) [2022-11-19 08:02:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 870 transitions. [2022-11-19 08:02:47,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 865 [2022-11-19 08:02:47,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:47,517 INFO L195 NwaCegarLoop]: trace histogram [766, 91, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:47,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:47,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:02:47,718 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:47,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:47,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1821841902, now seen corresponding path program 13 times [2022-11-19 08:02:47,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:47,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440122926] [2022-11-19 08:02:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:47,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 297947 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 293761 trivial. 0 not checked. [2022-11-19 08:03:05,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:05,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440122926] [2022-11-19 08:03:05,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440122926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119663261] [2022-11-19 08:03:05,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:03:05,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:05,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:05,873 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:05,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aeede91-5483-486b-86d8-1eb5cfc7140f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:03:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:08,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 7325 conjuncts, 770 conjunts are in the unsatisfiable core [2022-11-19 08:03:08,099 INFO L286 TraceCheckSpWp]: Computing forward predicates...