./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sina1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:29:37,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:29:37,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:29:37,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:29:37,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:29:37,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:29:37,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:29:37,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:29:37,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:29:37,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:29:37,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:29:37,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:29:37,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:29:37,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:29:37,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:29:37,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:29:37,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:29:37,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:29:37,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:29:37,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:29:37,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:29:37,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:29:37,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:29:37,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:29:37,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:29:37,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:29:37,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:29:37,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:29:37,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:29:37,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:29:37,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:29:37,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:29:37,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:29:37,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:29:37,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:29:37,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:29:37,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:29:37,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:29:37,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:29:37,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:29:37,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:29:37,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:29:37,464 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:29:37,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:29:37,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:29:37,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:29:37,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:29:37,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:29:37,467 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:29:37,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:29:37,467 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:29:37,467 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:29:37,469 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:29:37,469 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:29:37,469 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:29:37,470 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:29:37,470 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:29:37,471 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:29:37,471 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:29:37,471 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:29:37,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:29:37,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:29:37,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:29:37,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:29:37,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:29:37,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:29:37,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:29:37,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:29:37,480 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:29:37,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:29:37,481 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:29:37,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:29:37,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:29:37,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:29:37,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:37,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:29:37,482 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:29:37,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:29:37,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:29:37,483 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:29:37,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:29:37,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:29:37,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:29:37,484 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_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf [2022-11-03 03:29:37,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:29:37,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:29:37,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:29:37,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:29:37,804 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:29:37,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/sina1.c [2022-11-03 03:29:37,902 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/data/e77e53218/9b47598f7eae4f25ba85986c503ca9c6/FLAGd2d7ace80 [2022-11-03 03:29:38,331 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:29:38,332 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/sv-benchmarks/c/array-fpi/sina1.c [2022-11-03 03:29:38,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/data/e77e53218/9b47598f7eae4f25ba85986c503ca9c6/FLAGd2d7ace80 [2022-11-03 03:29:38,726 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/data/e77e53218/9b47598f7eae4f25ba85986c503ca9c6 [2022-11-03 03:29:38,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:29:38,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:29:38,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:38,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:29:38,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:29:38,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:38" (1/1) ... [2022-11-03 03:29:38,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d9fb27b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:38, skipping insertion in model container [2022-11-03 03:29:38,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:38" (1/1) ... [2022-11-03 03:29:38,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:29:38,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:38,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2022-11-03 03:29:38,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:38,988 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:29:39,002 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2022-11-03 03:29:39,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:39,039 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:29:39,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39 WrapperNode [2022-11-03 03:29:39,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:39,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:39,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:29:39,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:29:39,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,091 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2022-11-03 03:29:39,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:39,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:29:39,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:29:39,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:29:39,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,138 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:29:39,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:29:39,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:29:39,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:29:39,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (1/1) ... [2022-11-03 03:29:39,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:39,179 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:29:39,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:29:39,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:29:39,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:29:39,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:29:39,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:29:39,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:29:39,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:29:39,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:29:39,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:29:39,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:29:39,307 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:29:39,309 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:29:39,489 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:29:39,527 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:29:39,528 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 03:29:39,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:39 BoogieIcfgContainer [2022-11-03 03:29:39,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:29:39,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:29:39,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:29:39,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:29:39,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:29:38" (1/3) ... [2022-11-03 03:29:39,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d854bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:39, skipping insertion in model container [2022-11-03 03:29:39,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:39" (2/3) ... [2022-11-03 03:29:39,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d854bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:39, skipping insertion in model container [2022-11-03 03:29:39,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:39" (3/3) ... [2022-11-03 03:29:39,540 INFO L112 eAbstractionObserver]: Analyzing ICFG sina1.c [2022-11-03 03:29:39,561 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:29:39,562 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:29:39,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:29:39,619 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;@6665bcff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:29:39,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:29:39,630 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) [2022-11-03 03:29:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 03:29:39,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:39,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:39,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash 90967917, now seen corresponding path program 1 times [2022-11-03 03:29:39,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:39,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205039106] [2022-11-03 03:29:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:39,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:40,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:40,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205039106] [2022-11-03 03:29:40,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205039106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:40,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:40,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:40,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299878507] [2022-11-03 03:29:40,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:40,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:40,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:40,100 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) [2022-11-03 03:29:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:40,174 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2022-11-03 03:29:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:40,177 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 [2022-11-03 03:29:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:40,185 INFO L225 Difference]: With dead ends: 20 [2022-11-03 03:29:40,186 INFO L226 Difference]: Without dead ends: 10 [2022-11-03 03:29:40,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:40,192 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:40,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-03 03:29:40,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-03 03:29:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-03 03:29:40,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-03 03:29:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:40,235 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-03 03:29:40,236 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) [2022-11-03 03:29:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-03 03:29:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:29:40,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:40,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:40,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:29:40,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:40,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:40,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1733550639, now seen corresponding path program 1 times [2022-11-03 03:29:40,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:40,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547286867] [2022-11-03 03:29:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:40,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:29:40,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:40,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547286867] [2022-11-03 03:29:40,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547286867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:40,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:40,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:40,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566459276] [2022-11-03 03:29:40,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:40,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:40,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:40,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:40,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:40,412 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-03 03:29:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:40,474 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-03 03:29:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:40,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 [2022-11-03 03:29:40,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:40,476 INFO L225 Difference]: With dead ends: 21 [2022-11-03 03:29:40,476 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 03:29:40,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:40,478 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:40,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:40,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 03:29:40,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2022-11-03 03:29:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-03 03:29:40,484 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-03 03:29:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:40,484 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-03 03:29:40,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-03 03:29:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:29:40,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:40,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:40,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:29:40,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:40,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:40,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2086190460, now seen corresponding path program 1 times [2022-11-03 03:29:40,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:40,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590551441] [2022-11-03 03:29:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:40,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:41,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:41,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590551441] [2022-11-03 03:29:41,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590551441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:41,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269291265] [2022-11-03 03:29:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:41,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:41,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:41,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:41,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:29:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:41,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 03:29:41,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:41,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-11-03 03:29:41,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:29:41,605 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:29:41,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 03:29:41,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-03 03:29:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:41,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:47,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269291265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:47,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [232983005] [2022-11-03 03:29:47,954 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:29:47,954 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:47,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:47,963 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:47,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:48,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:48,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:48,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:48,124 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:29:48,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:29:48,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:48,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:48,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:29:48,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:48,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:29:48,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:48,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:29:48,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:48,443 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:29:48,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:29:48,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:29:48,574 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:48,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:29:48,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:48,650 INFO L356 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-11-03 03:29:48,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 80 [2022-11-03 03:29:48,741 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:29:48,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:29:48,762 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:49,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '170#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:49,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:49,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:49,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-03 03:29:49,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959316125] [2022-11-03 03:29:49,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:49,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 03:29:49,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 03:29:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=318, Unknown=2, NotChecked=0, Total=380 [2022-11-03 03:29:49,172 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 15 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) [2022-11-03 03:29:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:49,534 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-11-03 03:29:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 03:29:49,534 INFO L78 Accepts]: Start accepts. Automaton has has 15 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) Word has length 9 [2022-11-03 03:29:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:49,535 INFO L225 Difference]: With dead ends: 31 [2022-11-03 03:29:49,535 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 03:29:49,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=149, Invalid=661, Unknown=2, NotChecked=0, Total=812 [2022-11-03 03:29:49,537 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:49,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 43 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 94 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-11-03 03:29:49,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 03:29:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 16. [2022-11-03 03:29:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-03 03:29:49,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2022-11-03 03:29:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:49,543 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-03 03:29:49,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 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) [2022-11-03 03:29:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-03 03:29:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:29:49,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:49,545 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:49,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:29:49,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:49,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:49,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1070514912, now seen corresponding path program 2 times [2022-11-03 03:29:49,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:49,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085272767] [2022-11-03 03:29:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:49,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:49,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:49,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085272767] [2022-11-03 03:29:49,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085272767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855059050] [2022-11-03 03:29:49,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:29:49,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:49,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:49,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:49,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:29:49,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:29:49,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:29:49,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:49,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:50,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855059050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [475218397] [2022-11-03 03:29:50,055 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:29:50,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:50,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:50,060 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:50,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:50,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:50,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:50,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:50,172 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:29:50,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:29:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:50,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:29:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:50,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:50,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:29:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:50,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:29:50,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:50,363 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:29:50,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:29:50,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:29:50,484 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:50,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:29:50,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:50,555 INFO L356 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-11-03 03:29:50,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 80 [2022-11-03 03:29:50,630 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:29:50,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:29:50,653 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:50,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '327#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:50,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:50,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:50,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 03:29:50,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201514794] [2022-11-03 03:29:50,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:50,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:29:50,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:50,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:29:50,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:29:50,937 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2022-11-03 03:29:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:51,114 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-03 03:29:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:29:51,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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 10 [2022-11-03 03:29:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:51,115 INFO L225 Difference]: With dead ends: 37 [2022-11-03 03:29:51,115 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 03:29:51,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:29:51,116 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:51,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 32 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:51,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 03:29:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 17. [2022-11-03 03:29:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-03 03:29:51,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-11-03 03:29:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:51,122 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-03 03:29:51,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2022-11-03 03:29:51,123 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-03 03:29:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:29:51,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:51,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:51,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:51,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:51,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1182090675, now seen corresponding path program 3 times [2022-11-03 03:29:51,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:51,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21751377] [2022-11-03 03:29:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:51,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:51,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:51,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21751377] [2022-11-03 03:29:51,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21751377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:51,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783684645] [2022-11-03 03:29:51,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:29:51,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:51,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:51,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:51,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:29:52,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:29:52,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 03:29:52,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:52,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-11-03 03:29:52,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:29:52,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:29:52,178 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:29:52,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 03:29:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:52,284 INFO L356 Elim1Store]: treesize reduction 33, result has 36.5 percent of original size [2022-11-03 03:29:52,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 44 [2022-11-03 03:29:52,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-03 03:29:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:52,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:53,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783684645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:53,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [661052312] [2022-11-03 03:29:53,114 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:29:53,115 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:53,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:53,115 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:53,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:53,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:53,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:53,224 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:29:53,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:29:53,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:53,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:29:53,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:53,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:53,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:29:53,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:53,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:29:53,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:53,429 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:29:53,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:29:53,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:29:53,535 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:53,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:29:53,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:53,599 INFO L356 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-11-03 03:29:53,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 80 [2022-11-03 03:29:53,673 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:29:53,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:29:53,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:54,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '505#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:54,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:54,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:54,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-03 03:29:54,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726864533] [2022-11-03 03:29:54,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:54,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:29:54,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:54,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:29:54,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:29:54,112 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2022-11-03 03:29:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:54,661 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-11-03 03:29:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:29:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 25 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 11 [2022-11-03 03:29:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:54,663 INFO L225 Difference]: With dead ends: 40 [2022-11-03 03:29:54,663 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 03:29:54,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=216, Invalid=1506, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 03:29:54,669 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:54,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 139 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-11-03 03:29:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 03:29:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 22. [2022-11-03 03:29:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-11-03 03:29:54,687 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 11 [2022-11-03 03:29:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:54,688 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-11-03 03:29:54,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2022-11-03 03:29:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-11-03 03:29:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 03:29:54,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:54,692 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:54,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:54,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:54,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2006251185, now seen corresponding path program 4 times [2022-11-03 03:29:54,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:54,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665919191] [2022-11-03 03:29:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:54,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:55,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:55,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665919191] [2022-11-03 03:29:55,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665919191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630805794] [2022-11-03 03:29:55,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:29:55,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:55,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:55,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:55,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:29:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:55,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:29:55,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:55,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:55,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630805794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:55,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184811505] [2022-11-03 03:29:55,273 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:29:55,273 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:55,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:55,273 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:55,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:55,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,375 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:29:55,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:29:55,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:29:55,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:29:55,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:29:55,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:55,541 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:29:55,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:29:55,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:29:55,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:55,665 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:55,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:29:55,715 INFO L356 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2022-11-03 03:29:55,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 68 [2022-11-03 03:29:55,762 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:29:55,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:29:55,802 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:56,220 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '714#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:56,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:56,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:56,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 03:29:56,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141997710] [2022-11-03 03:29:56,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:56,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:29:56,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:56,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:29:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:29:56,222 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:56,478 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-11-03 03:29:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:29:56,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 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 12 [2022-11-03 03:29:56,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:56,479 INFO L225 Difference]: With dead ends: 54 [2022-11-03 03:29:56,479 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 03:29:56,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:29:56,481 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:56,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 89 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 03:29:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 23. [2022-11-03 03:29:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2022-11-03 03:29:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-11-03 03:29:56,488 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2022-11-03 03:29:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:56,488 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-11-03 03:29:56,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-11-03 03:29:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 03:29:56,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:56,489 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:56,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:56,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:56,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:56,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1528394540, now seen corresponding path program 1 times [2022-11-03 03:29:56,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:56,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107498615] [2022-11-03 03:29:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:56,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:29:56,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:56,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107498615] [2022-11-03 03:29:56,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107498615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:56,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710983666] [2022-11-03 03:29:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:56,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:56,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:56,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:56,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:29:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:56,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:29:56,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:29:56,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:29:56,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710983666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:56,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745765822] [2022-11-03 03:29:56,933 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:29:56,933 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:56,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:56,933 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:56,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:56,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:56,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:57,031 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:29:57,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:29:57,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:57,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:57,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:29:57,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:57,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:29:57,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:57,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:29:57,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:57,211 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:29:57,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:29:57,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:29:57,312 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:57,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:29:57,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:57,380 INFO L356 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-11-03 03:29:57,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 80 [2022-11-03 03:29:57,436 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:29:57,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:29:57,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:57,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '926#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:57,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:57,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:57,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 03:29:57,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482007423] [2022-11-03 03:29:57,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:57,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:29:57,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:57,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:29:57,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:29:57,978 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-11-03 03:29:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:58,062 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-03 03:29:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:58,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) Word has length 12 [2022-11-03 03:29:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:58,066 INFO L225 Difference]: With dead ends: 45 [2022-11-03 03:29:58,066 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 03:29:58,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:29:58,068 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:58,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 03:29:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2022-11-03 03:29:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-03 03:29:58,076 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-11-03 03:29:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:58,076 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-03 03:29:58,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-11-03 03:29:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-03 03:29:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:29:58,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:58,077 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:58,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:58,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:58,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:58,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:58,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2055930012, now seen corresponding path program 5 times [2022-11-03 03:29:58,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:58,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650677986] [2022-11-03 03:29:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:58,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:58,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650677986] [2022-11-03 03:29:58,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650677986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943119306] [2022-11-03 03:29:58,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:29:58,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:58,967 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:58,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:29:59,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:29:59,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:59,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 03:29:59,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:59,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-11-03 03:29:59,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:29:59,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:29:59,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:29:59,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 03:29:59,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 32 [2022-11-03 03:29:59,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,406 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-03 03:29:59,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2022-11-03 03:29:59,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 26 [2022-11-03 03:29:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:59,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:28,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943119306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:28,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1046677048] [2022-11-03 03:30:28,375 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:30:28,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:28,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:28,375 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:28,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:28,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:30:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:28,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:28,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:28,487 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:30:28,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:30:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:28,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:28,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:30:28,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:28,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:30:28,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:28,621 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:30:28,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:30:28,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:30:28,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:28,705 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:30:28,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:30:28,747 INFO L356 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2022-11-03 03:30:28,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 68 [2022-11-03 03:30:28,795 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:30:28,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:30:28,834 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:29,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1139#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:29,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:29,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:30:29,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-03 03:30:29,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343786034] [2022-11-03 03:30:29,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:29,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 03:30:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 03:30:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1073, Unknown=26, NotChecked=0, Total=1260 [2022-11-03 03:30:29,651 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:32,270 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse0 (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|))) (and (< 2 c_~N~0) (<= .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|) (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int) (v_ArrVal_215 Int)) (or (= c_~N~0 (select (let ((.cse1 (store .cse2 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_215))) (store .cse1 (+ (* |v_ULTIMATE.start_main_~i~0#1_143| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) |c_ULTIMATE.start_main_~a~0#1.offset|)) (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) c_~N~0))) (= 3 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_139| Int)) (let ((.cse3 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= .cse3 (select .cse2 (+ (* |v_ULTIMATE.start_main_~i~0#1_139| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (<= .cse0 |ULTIMATE.start_main_~#sum~0#1.base|) (= .cse3 3) (<= |c_ULTIMATE.start_main_~i~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_139| 1))))) (<= c_~N~0 3) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 3))) is different from false [2022-11-03 03:30:32,831 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (or (<= (+ 3 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0) (let ((.cse0 (select .cse1 0))) (and (not (= (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (<= .cse0 c_~N~0) (<= c_~N~0 .cse0)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (= (select (store .cse1 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0))))) is different from false [2022-11-03 03:30:33,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:33,166 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2022-11-03 03:30:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 03:30:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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 [2022-11-03 03:30:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:33,168 INFO L225 Difference]: With dead ends: 48 [2022-11-03 03:30:33,169 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 03:30:33,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=256, Invalid=1884, Unknown=30, NotChecked=182, Total=2352 [2022-11-03 03:30:33,170 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:33,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 68 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 101 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-11-03 03:30:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 03:30:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 23. [2022-11-03 03:30:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-11-03 03:30:33,181 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2022-11-03 03:30:33,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:33,181 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-11-03 03:30:33,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:33,181 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-11-03 03:30:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:30:33,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:33,182 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:33,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:33,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 03:30:33,387 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:33,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1911128237, now seen corresponding path program 6 times [2022-11-03 03:30:33,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:33,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820357128] [2022-11-03 03:30:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:33,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:33,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:33,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820357128] [2022-11-03 03:30:33,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820357128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:33,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828246312] [2022-11-03 03:30:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:30:33,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:33,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:33,506 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:33,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:30:33,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:30:33,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:30:33,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:30:33,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:33,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:33,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828246312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1862683634] [2022-11-03 03:30:33,736 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:30:33,736 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:33,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:33,736 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:33,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:33,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:33,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:33,828 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 03:30:33,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 03:30:33,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:33,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:33,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:33,925 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:30:33,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:30:33,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:33,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:30:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:33,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:30:34,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:34,060 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:30:34,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:30:34,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:30:34,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:34,139 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:30:34,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:30:34,180 INFO L356 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2022-11-03 03:30:34,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 68 [2022-11-03 03:30:34,233 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:30:34,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:30:34,275 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:34,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1373#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:34,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:34,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:30:34,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-03 03:30:34,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652138711] [2022-11-03 03:30:34,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:34,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 03:30:34,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:34,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 03:30:34,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:30:34,793 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:34,997 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-11-03 03:30:34,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:30:34,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 [2022-11-03 03:30:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:34,998 INFO L225 Difference]: With dead ends: 76 [2022-11-03 03:30:34,998 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 03:30:34,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-11-03 03:30:34,999 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:35,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 39 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:35,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 03:30:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2022-11-03 03:30:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-03 03:30:35,014 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 13 [2022-11-03 03:30:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:35,014 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-03 03:30:35,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-03 03:30:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 03:30:35,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:35,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:35,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:35,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 03:30:35,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:35,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:35,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1221265221, now seen corresponding path program 2 times [2022-11-03 03:30:35,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:35,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542419937] [2022-11-03 03:30:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:36,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542419937] [2022-11-03 03:30:36,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542419937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274811162] [2022-11-03 03:30:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:30:36,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:36,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:36,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:36,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:30:36,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:30:36,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:30:36,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 03:30:36,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:36,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-11-03 03:30:36,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:30:36,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:30:36,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:30:36,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 03:30:36,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:36,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 30 [2022-11-03 03:30:36,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2022-11-03 03:30:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:36,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:37,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274811162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436818441] [2022-11-03 03:30:37,210 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:30:37,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:37,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:37,210 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:37,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:37,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:37,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:37,311 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 03:30:37,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 03:30:37,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:37,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:37,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:37,412 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:30:37,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:30:37,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:37,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:30:37,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:37,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:30:37,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:37,568 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:30:37,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:30:37,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:30:37,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:37,649 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:30:37,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:30:37,690 INFO L356 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2022-11-03 03:30:37,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 68 [2022-11-03 03:30:37,727 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:30:37,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:30:37,823 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:38,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1661#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:38,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:38,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:30:38,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-03 03:30:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574947384] [2022-11-03 03:30:38,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 03:30:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 03:30:38,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 03:30:38,651 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:39,935 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-03 03:30:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:30:39,936 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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 14 [2022-11-03 03:30:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:39,936 INFO L225 Difference]: With dead ends: 40 [2022-11-03 03:30:39,936 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 03:30:39,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 03:30:39,938 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:39,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 179 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2022-11-03 03:30:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 03:30:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-03 03:30:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-03 03:30:39,955 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 14 [2022-11-03 03:30:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:39,955 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-03 03:30:39,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-03 03:30:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:30:39,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:39,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:39,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:40,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:30:40,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:40,169 INFO L85 PathProgramCache]: Analyzing trace with hash -8393427, now seen corresponding path program 7 times [2022-11-03 03:30:40,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:40,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386916022] [2022-11-03 03:30:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:40,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:40,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:40,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386916022] [2022-11-03 03:30:40,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386916022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:40,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871629564] [2022-11-03 03:30:40,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:30:40,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:40,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:40,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:41,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:30:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:41,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 03:30:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:41,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-11-03 03:30:41,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:30:41,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:30:41,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:30:41,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:30:41,278 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:30:41,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 03:30:41,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:41,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:30:41,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:41,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:30:41,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:41,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:30:41,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-03 03:30:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:41,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:51,831 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_357 Int) (|v_ULTIMATE.start_main_~i~0#1_215| Int) (v_ArrVal_360 Int) (|v_ULTIMATE.start_main_~i~0#1_216| Int) (v_ArrVal_358 Int)) (or (= c_~N~0 (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_357) (+ (* |v_ULTIMATE.start_main_~i~0#1_216| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_358) (+ (* |v_ULTIMATE.start_main_~i~0#1_215| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_360) |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_216| 1) |v_ULTIMATE.start_main_~i~0#1_215|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_216|)))) is different from false [2022-11-03 03:31:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 6 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-03 03:31:59,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871629564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:59,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84856957] [2022-11-03 03:31:59,750 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:31:59,751 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:59,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:59,751 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:59,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,856 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:31:59,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:31:59,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:31:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:31:59,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:32:00,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:00,029 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:32:00,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:32:00,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:32:00,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:00,112 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:32:00,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:32:00,159 INFO L356 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2022-11-03 03:32:00,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 68 [2022-11-03 03:32:00,194 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:32:00,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:32:00,209 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:00,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1916#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:32:00,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:00,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:00,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-11-03 03:32:00,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071400993] [2022-11-03 03:32:00,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:00,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:32:00,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:00,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:32:00,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1326, Unknown=43, NotChecked=76, Total=1640 [2022-11-03 03:32:00,701 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:08,946 WARN L234 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 44 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:32:09,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:09,684 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2022-11-03 03:32:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 03:32:09,685 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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 15 [2022-11-03 03:32:09,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:09,686 INFO L225 Difference]: With dead ends: 81 [2022-11-03 03:32:09,686 INFO L226 Difference]: Without dead ends: 79 [2022-11-03 03:32:09,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 87.4s TimeCoverageRelationStatistics Valid=425, Invalid=2842, Unknown=43, NotChecked=112, Total=3422 [2022-11-03 03:32:09,689 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:09,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 171 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 213 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-11-03 03:32:09,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-03 03:32:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 31. [2022-11-03 03:32:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-03 03:32:09,707 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2022-11-03 03:32:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:09,707 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-03 03:32:09,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:09,707 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-03 03:32:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:32:09,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:09,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:09,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:09,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 03:32:09,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:09,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1982520332, now seen corresponding path program 3 times [2022-11-03 03:32:09,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:09,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941884587] [2022-11-03 03:32:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:09,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:10,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:10,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941884587] [2022-11-03 03:32:10,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941884587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:10,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438049501] [2022-11-03 03:32:10,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:32:10,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:10,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:10,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:10,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:32:10,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:32:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:32:10,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:32:10,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:10,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-11-03 03:32:10,975 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:10,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:32:11,023 INFO L356 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-03 03:32:11,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 27 [2022-11-03 03:32:11,104 INFO L356 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-03 03:32:11,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-03 03:32:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:32:11,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:12,447 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_406 Int) (|v_ULTIMATE.start_main_~i~0#1_238| Int)) (or (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_238| 4)) v_ArrVal_406))) (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_238|)))) is different from false [2022-11-03 03:32:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2022-11-03 03:32:46,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438049501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134489847] [2022-11-03 03:32:46,700 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:32:46,700 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:46,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:46,700 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:46,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:46,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:46,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:46,798 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:32:46,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:32:46,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:46,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:32:46,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:46,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:46,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:32:46,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:46,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:32:46,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:46,970 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:32:46,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:32:47,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:32:47,074 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:32:47,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:32:47,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:47,151 INFO L356 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-11-03 03:32:47,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 80 [2022-11-03 03:32:47,213 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:32:47,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:32:47,307 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:48,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2245#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:32:48,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:48,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:48,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2022-11-03 03:32:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723026751] [2022-11-03 03:32:48,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 03:32:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 03:32:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=921, Unknown=18, NotChecked=62, Total=1122 [2022-11-03 03:32:48,129 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:49,091 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse2 (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse4 (= .cse2 4)) (.cse7 (* c_~N~0 4))) (and (forall ((v_ArrVal_406 Int) (|v_ULTIMATE.start_main_~i~0#1_238| Int)) (or (let ((.cse0 (store (store .cse1 .cse2 .cse3) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_238| 4)) v_ArrVal_406))) (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_238|)))) (or (let ((.cse5 (select .cse1 4))) (and (not .cse4) (<= .cse5 c_~N~0) (<= c_~N~0 .cse5))) (<= (+ 5 .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse7)) (= .cse3 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (or (and (<= c_~N~0 .cse3) (<= .cse3 c_~N~0) .cse4) (<= (+ .cse6 9 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse7)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2022-11-03 03:32:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:56,004 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-11-03 03:32:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:32:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 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 16 [2022-11-03 03:32:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:56,005 INFO L225 Difference]: With dead ends: 40 [2022-11-03 03:32:56,005 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 03:32:56,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=268, Invalid=1974, Unknown=22, NotChecked=186, Total=2450 [2022-11-03 03:32:56,007 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:56,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 276 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-11-03 03:32:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 03:32:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-11-03 03:32:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-03 03:32:56,024 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 16 [2022-11-03 03:32:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:56,024 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-03 03:32:56,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-03 03:32:56,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 03:32:56,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:56,026 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:56,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:56,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:56,232 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1173097116, now seen corresponding path program 4 times [2022-11-03 03:32:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:56,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675240628] [2022-11-03 03:32:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:57,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:57,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675240628] [2022-11-03 03:32:57,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675240628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:57,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942577778] [2022-11-03 03:32:57,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:32:57,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:57,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:57,129 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:57,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:32:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:57,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 03:32:57,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:57,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 7 [2022-11-03 03:32:57,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:57,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:57,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-03 03:32:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2022-11-03 03:32:57,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 47 treesize of output 42 [2022-11-03 03:32:58,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:58,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 29 [2022-11-03 03:32:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:58,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:32:58,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942577778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:58,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414110074] [2022-11-03 03:32:58,766 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:32:58,767 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:58,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:58,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:58,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:58,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:58,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:58,881 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:32:58,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:32:58,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:58,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:58,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:32:58,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:58,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:32:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:58,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:32:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:59,052 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:32:59,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:32:59,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:32:59,142 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:32:59,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:32:59,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:59,213 INFO L356 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-11-03 03:32:59,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 80 [2022-11-03 03:32:59,285 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:32:59,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:32:59,358 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:00,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2541#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:00,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:00,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:00,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 35 [2022-11-03 03:33:00,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377130995] [2022-11-03 03:33:00,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:00,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 03:33:00,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:00,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 03:33:00,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:33:00,261 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:01,788 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-11-03 03:33:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 03:33:01,789 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 03:33:01,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:01,789 INFO L225 Difference]: With dead ends: 53 [2022-11-03 03:33:01,790 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 03:33:01,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=357, Invalid=2613, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 03:33:01,792 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:01,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 203 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-11-03 03:33:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 03:33:01,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-03 03:33:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-03 03:33:01,805 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2022-11-03 03:33:01,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:01,806 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-03 03:33:01,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,806 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-03 03:33:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:33:01,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:01,807 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:01,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-03 03:33:02,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:33:02,008 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:02,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash -96940851, now seen corresponding path program 5 times [2022-11-03 03:33:02,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:02,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075976060] [2022-11-03 03:33:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:02,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:33:02,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075976060] [2022-11-03 03:33:02,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075976060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:02,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402023985] [2022-11-03 03:33:02,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:33:02,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:02,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:02,235 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:02,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:33:02,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:33:02,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:02,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:33:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:33:02,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:33:02,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402023985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:02,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188110146] [2022-11-03 03:33:02,739 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:33:02,739 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:02,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:02,740 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:02,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,850 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 03:33:02,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 03:33:02,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:33:02,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,962 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:33:02,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:33:02,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:33:03,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:03,084 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:33:03,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:33:03,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:33:03,165 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:33:03,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:33:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:03,234 INFO L356 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-11-03 03:33:03,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 80 [2022-11-03 03:33:03,302 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:33:03,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:33:03,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:03,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2855#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:03,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:03,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:03,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-11-03 03:33:03,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137874194] [2022-11-03 03:33:03,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:03,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 03:33:03,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:03,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 03:33:03,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-11-03 03:33:04,000 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:04,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:04,375 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2022-11-03 03:33:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:33:04,376 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 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 23 [2022-11-03 03:33:04,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:04,377 INFO L225 Difference]: With dead ends: 108 [2022-11-03 03:33:04,377 INFO L226 Difference]: Without dead ends: 89 [2022-11-03 03:33:04,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:33:04,378 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 128 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:04,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 71 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:33:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-03 03:33:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2022-11-03 03:33:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-11-03 03:33:04,408 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-11-03 03:33:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:04,408 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-11-03 03:33:04,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-11-03 03:33:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 03:33:04,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:04,409 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:04,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:04,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:33:04,610 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash -953993061, now seen corresponding path program 6 times [2022-11-03 03:33:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:04,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322789941] [2022-11-03 03:33:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:06,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:06,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322789941] [2022-11-03 03:33:06,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322789941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:06,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129430812] [2022-11-03 03:33:06,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:33:06,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:06,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:06,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:06,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:33:06,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:33:06,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:06,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 03:33:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:06,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 03:33:06,353 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-03 03:33:06,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-03 03:33:06,406 INFO L356 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-03 03:33:06,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 29 [2022-11-03 03:33:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:33:06,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:36,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 254 [2022-11-03 03:33:36,760 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:36,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2165 treesize of output 1825 [2022-11-03 03:33:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 1 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:33:37,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129430812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1021622831] [2022-11-03 03:33:37,352 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:33:37,353 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:37,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:37,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:37,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:37,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:37,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:37,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:37,469 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:33:37,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:33:37,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:37,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:33:37,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:37,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:37,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:33:37,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:37,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:33:37,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:37,638 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:33:37,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:33:37,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:33:37,720 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:33:37,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:33:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:37,783 INFO L356 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-11-03 03:33:37,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 80 [2022-11-03 03:33:37,837 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:33:37,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:33:37,923 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:38,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3310#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:38,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:38,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:38,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16] total 40 [2022-11-03 03:33:38,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28254735] [2022-11-03 03:33:38,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:38,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:33:38,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:33:38,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1795, Unknown=11, NotChecked=0, Total=1980 [2022-11-03 03:33:38,942 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:43,430 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-11-03 03:33:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 03:33:43,431 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 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 [2022-11-03 03:33:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:43,431 INFO L225 Difference]: With dead ends: 78 [2022-11-03 03:33:43,431 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 03:33:43,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=508, Invalid=4450, Unknown=12, NotChecked=0, Total=4970 [2022-11-03 03:33:43,434 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:43,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 113 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 559 Invalid, 0 Unknown, 32 Unchecked, 0.6s Time] [2022-11-03 03:33:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 03:33:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-11-03 03:33:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-03 03:33:43,465 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 24 [2022-11-03 03:33:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:43,465 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-03 03:33:43,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-03 03:33:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 03:33:43,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:43,480 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:43,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 03:33:43,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:33:43,691 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:43,691 INFO L85 PathProgramCache]: Analyzing trace with hash -233727667, now seen corresponding path program 7 times [2022-11-03 03:33:43,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:43,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231790803] [2022-11-03 03:33:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:43,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:45,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:45,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231790803] [2022-11-03 03:33:45,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231790803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:45,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350419712] [2022-11-03 03:33:45,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:33:45,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:45,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:45,272 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:45,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:33:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:45,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 03:33:45,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:45,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:33:45,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:45,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-11-03 03:33:45,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 30 [2022-11-03 03:33:45,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 27 [2022-11-03 03:33:45,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 40 treesize of output 41 [2022-11-03 03:33:45,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 40 treesize of output 41 [2022-11-03 03:33:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 42 treesize of output 41 [2022-11-03 03:33:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:33:46,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:56,220 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_356| Int) (|v_ULTIMATE.start_main_~i~0#1_355| Int) (v_ArrVal_642 Int) (|v_ULTIMATE.start_main_~i~0#1_357| Int) (v_ArrVal_640 Int) (v_ArrVal_637 Int)) (or (let ((.cse0 (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ (* |v_ULTIMATE.start_main_~i~0#1_357| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_637) (+ (* |v_ULTIMATE.start_main_~i~0#1_356| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_640) (+ (* |v_ULTIMATE.start_main_~i~0#1_355| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_642))) (= (select .cse0 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_357| 1) |v_ULTIMATE.start_main_~i~0#1_356|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_357|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_356| 1) |v_ULTIMATE.start_main_~i~0#1_355|)))) is different from false [2022-11-03 03:36:15,249 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:36:15,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 192 [2022-11-03 03:36:15,270 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:36:15,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 192 [2022-11-03 03:36:15,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5938 treesize of output 5794 [2022-11-03 03:39:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 5 times theorem prover too weak. 15 trivial. 6 not checked. [2022-11-03 03:39:09,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350419712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:09,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [924258796] [2022-11-03 03:39:09,626 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:39:09,626 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:39:09,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:39:09,627 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:39:09,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:39:09,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:09,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:39:09,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:09,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:09,728 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:39:09,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:39:09,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:09,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:09,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:39:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:09,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:39:09,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:39:09,876 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:39:09,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:39:09,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:39:09,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:39:09,969 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:39:09,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:39:10,025 INFO L356 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2022-11-03 03:39:10,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 68 [2022-11-03 03:39:10,071 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:39:10,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:39:10,159 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:39:11,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3752#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:39:11,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:39:11,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:39:11,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 17] total 48 [2022-11-03 03:39:11,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468774572] [2022-11-03 03:39:11,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:39:11,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 03:39:11,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 03:39:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2324, Unknown=63, NotChecked=100, Total=2756 [2022-11-03 03:39:11,248 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:16,154 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (= |ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select .cse1 .cse2) .cse0)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_356| Int) (|v_ULTIMATE.start_main_~i~0#1_355| Int) (v_ArrVal_642 Int) (|v_ULTIMATE.start_main_~i~0#1_357| Int) (v_ArrVal_640 Int) (v_ArrVal_637 Int)) (or (let ((.cse3 (store (store (store (store .cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ (* |v_ULTIMATE.start_main_~i~0#1_357| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_637) (+ (* |v_ULTIMATE.start_main_~i~0#1_356| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_640) (+ (* |v_ULTIMATE.start_main_~i~0#1_355| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_642))) (= (select .cse3 .cse2) (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_357| 1) |v_ULTIMATE.start_main_~i~0#1_356|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_357|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_356| 1) |v_ULTIMATE.start_main_~i~0#1_355|)))) (<= 4 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-11-03 03:39:18,170 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (or (let ((.cse0 (select .cse1 8))) (and (<= .cse0 c_~N~0) (<= (+ (div (- |c_ULTIMATE.start_main_~a~0#1.offset|) 4) 4) |c_ULTIMATE.start_main_~i~0#1|) (<= c_~N~0 .cse0))) (<= (+ .cse2 9 |c_ULTIMATE.start_main_~a~0#1.offset|) (* c_~N~0 4))) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse3 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= .cse3 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (= |ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select .cse1 .cse4) .cse3)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_356| Int) (|v_ULTIMATE.start_main_~i~0#1_355| Int) (v_ArrVal_642 Int) (|v_ULTIMATE.start_main_~i~0#1_357| Int) (v_ArrVal_640 Int) (v_ArrVal_637 Int)) (or (let ((.cse5 (store (store (store (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ (* |v_ULTIMATE.start_main_~i~0#1_357| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_637) (+ (* |v_ULTIMATE.start_main_~i~0#1_356| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_640) (+ (* |v_ULTIMATE.start_main_~i~0#1_355| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_642))) (= (select .cse5 .cse4) (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_357| 1) |v_ULTIMATE.start_main_~i~0#1_356|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_357|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_356| 1) |v_ULTIMATE.start_main_~i~0#1_355|)))) (<= 4 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-11-03 03:39:20,187 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (select .cse1 .cse3))) (and (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (not (= |ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_356| Int) (|v_ULTIMATE.start_main_~i~0#1_355| Int) (v_ArrVal_642 Int) (|v_ULTIMATE.start_main_~i~0#1_357| Int) (v_ArrVal_640 Int) (v_ArrVal_637 Int)) (or (let ((.cse2 (store (store (store (store .cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ (* |v_ULTIMATE.start_main_~i~0#1_357| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_637) (+ (* |v_ULTIMATE.start_main_~i~0#1_356| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_640) (+ (* |v_ULTIMATE.start_main_~i~0#1_355| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_642))) (= (select .cse2 .cse3) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_357| 1) |v_ULTIMATE.start_main_~i~0#1_356|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_357|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_356| 1) |v_ULTIMATE.start_main_~i~0#1_355|))))))) is different from false [2022-11-03 03:39:21,995 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (select .cse1 .cse6)) (.cse3 (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (not (= |ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (or (let ((.cse2 (select .cse1 8))) (and (<= .cse2 c_~N~0) (not (= .cse3 8)) (<= c_~N~0 .cse2))) (<= (+ 5 .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (* c_~N~0 4))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_356| Int) (|v_ULTIMATE.start_main_~i~0#1_355| Int) (v_ArrVal_642 Int) (|v_ULTIMATE.start_main_~i~0#1_357| Int) (v_ArrVal_640 Int) (v_ArrVal_637 Int)) (or (let ((.cse5 (store (store (store (store .cse1 .cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ (* |v_ULTIMATE.start_main_~i~0#1_357| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_637) (+ (* |v_ULTIMATE.start_main_~i~0#1_356| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_640) (+ (* |v_ULTIMATE.start_main_~i~0#1_355| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_642))) (= (select .cse5 .cse6) (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_357| 1) |v_ULTIMATE.start_main_~i~0#1_356|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_357|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_356| 1) |v_ULTIMATE.start_main_~i~0#1_355|))))))) is different from false [2022-11-03 03:39:23,711 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse6 (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (or (<= (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 1) (* c_~N~0 4)) (let ((.cse1 (select .cse2 8))) (and (<= .cse1 c_~N~0) (<= c_~N~0 .cse1)))) (= (select .cse2 .cse3) .cse4) (forall ((|v_ULTIMATE.start_main_~i~0#1_356| Int) (|v_ULTIMATE.start_main_~i~0#1_355| Int) (v_ArrVal_642 Int) (v_ArrVal_640 Int) (v_ArrVal_637 Int)) (or (let ((.cse5 (store (store (store .cse2 .cse6 v_ArrVal_637) (+ (* |v_ULTIMATE.start_main_~i~0#1_356| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_640) (+ (* |v_ULTIMATE.start_main_~i~0#1_355| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_642))) (= (select .cse5 .cse3) (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= .cse7 |v_ULTIMATE.start_main_~i~0#1_356|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_356| 1) |v_ULTIMATE.start_main_~i~0#1_355|)))) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) .cse4) (not (= |ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_355| Int) (v_ArrVal_642 Int) (v_ArrVal_640 Int)) (or (let ((.cse8 (store (store .cse2 .cse6 v_ArrVal_640) (+ (* |v_ULTIMATE.start_main_~i~0#1_355| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_642))) (= (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse8 .cse3))) (not (<= .cse7 |v_ULTIMATE.start_main_~i~0#1_355|))))))) is different from false [2022-11-03 03:40:04,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:04,250 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-11-03 03:40:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 03:40:04,251 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 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 25 [2022-11-03 03:40:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:04,251 INFO L225 Difference]: With dead ends: 80 [2022-11-03 03:40:04,251 INFO L226 Difference]: Without dead ends: 78 [2022-11-03 03:40:04,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 203.4s TimeCoverageRelationStatistics Valid=551, Invalid=4926, Unknown=97, NotChecked=906, Total=6480 [2022-11-03 03:40:04,255 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:04,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 90 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 429 Invalid, 0 Unknown, 175 Unchecked, 0.4s Time] [2022-11-03 03:40:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-03 03:40:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2022-11-03 03:40:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-03 03:40:04,282 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 25 [2022-11-03 03:40:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:04,283 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-03 03:40:04,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-03 03:40:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 03:40:04,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:04,284 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:04,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:04,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 03:40:04,502 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:04,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash -833766981, now seen corresponding path program 8 times [2022-11-03 03:40:04,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:04,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683285110] [2022-11-03 03:40:04,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:04,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:06,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:06,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683285110] [2022-11-03 03:40:06,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683285110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:40:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294724360] [2022-11-03 03:40:06,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:40:06,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:06,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:06,028 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:06,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c6c10c-a292-4c5c-ba8a-7db3f1ce4e18/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:40:06,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:40:06,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:40:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 03:40:06,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:06,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:40:06,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-03 03:40:06,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-03 03:40:06,719 INFO L356 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-03 03:40:06,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 55 [2022-11-03 03:40:07,238 INFO L356 Elim1Store]: treesize reduction 92, result has 69.3 percent of original size [2022-11-03 03:40:07,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 253 [2022-11-03 03:43:48,081 WARN L234 SmtUtils]: Spent 1.90m on a formula simplification. DAG size of input: 399 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:43:48,683 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:43:48,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 26 [2022-11-03 03:43:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:48,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:51,008 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_400| Int) (|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_714 Int) (v_ArrVal_712 Int)) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_712) (+ (* |v_ULTIMATE.start_main_~i~0#1_400| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_714))) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_400| 1) c_~N~0) (not (= (select .cse0 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0)) (= c_~N~0 (select .cse0 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= |v_ULTIMATE.start_main_~i~0#1_400| (+ |ULTIMATE.start_main_~i~0#1| 1)))))) is different from false [2022-11-03 03:43:53,042 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_400| Int) (|v_ULTIMATE.start_main_~i~0#1_401| Int) (v_ArrVal_714 Int) (v_ArrVal_712 Int)) (let ((.cse0 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ (* |v_ULTIMATE.start_main_~i~0#1_401| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_712) (+ (* |v_ULTIMATE.start_main_~i~0#1_400| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_714))) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_400| 1) c_~N~0) (= c_~N~0 (select .cse0 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= |v_ULTIMATE.start_main_~i~0#1_400| (+ |v_ULTIMATE.start_main_~i~0#1_401| 1))) (not (= c_~N~0 (select .cse0 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) is different from false [2022-11-03 03:43:53,071 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:43:53,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 90 [2022-11-03 03:43:53,127 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:43:53,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 9252 treesize of output 8952 [2022-11-03 03:44:12,570 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:44:12,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5304 treesize of output 1 [2022-11-03 03:44:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2022-11-03 03:44:13,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294724360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:13,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1849126384] [2022-11-03 03:44:13,096 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:44:13,096 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:44:13,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:44:13,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:44:13,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:44:13,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:44:13,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:44:13,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:44:13,206 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:44:13,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:44:13,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:44:13,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-03 03:44:13,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:44:13,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:44:13,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 03:44:13,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:44:13,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-03 03:44:13,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:44:13,355 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-03 03:44:13,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 325 treesize of output 307 [2022-11-03 03:44:13,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 03:44:13,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:44:13,443 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:44:13,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:44:13,485 INFO L356 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2022-11-03 03:44:13,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 68 [2022-11-03 03:44:13,527 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:44:13,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:44:13,606 INFO L180 IcfgInterpreter]: Interpretation finished