./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_k.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_k.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7 --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 ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:32:34,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:32:34,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:32:34,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:32:34,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:32:34,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:32:34,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:32:34,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:32:34,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:32:34,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:32:34,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:32:34,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:32:34,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:32:34,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:32:34,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:32:34,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:32:34,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:32:34,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:32:34,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:32:34,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:32:34,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:32:34,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:32:34,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:32:34,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:32:34,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:32:34,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:32:34,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:32:34,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:32:34,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:32:34,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:32:34,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:32:34,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:32:34,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:32:34,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:32:34,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:32:34,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:32:34,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:32:34,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:32:34,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:32:34,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:32:34,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:32:34,369 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:32:34,401 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:32:34,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:32:34,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:32:34,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:32:34,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:32:34,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:32:34,404 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:32:34,404 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:32:34,405 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:32:34,405 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:32:34,406 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:32:34,406 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:32:34,406 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:32:34,407 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:32:34,407 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:32:34,407 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:32:34,408 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:32:34,408 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:32:34,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:32:34,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:32:34,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:32:34,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:32:34,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:32:34,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:32:34,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:32:34,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:32:34,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:32:34,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:32:34,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:32:34,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:32:34,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:32:34,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:32:34,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:32:34,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:32:34,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:32:34,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:32:34,415 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:32:34,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:32:34,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:32:34,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:32:34,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:32:34,417 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b [2021-11-25 19:32:34,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:32:34,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:32:34,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:32:34,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:32:34,762 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:32:34,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-new/count_by_k.i [2021-11-25 19:32:34,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/data/fd658e2f6/98c0c17dccfe459ab0577a2217bca8a0/FLAG817c50450 [2021-11-25 19:32:35,331 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:32:35,332 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/sv-benchmarks/c/loop-new/count_by_k.i [2021-11-25 19:32:35,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/data/fd658e2f6/98c0c17dccfe459ab0577a2217bca8a0/FLAG817c50450 [2021-11-25 19:32:35,724 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/data/fd658e2f6/98c0c17dccfe459ab0577a2217bca8a0 [2021-11-25 19:32:35,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:32:35,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:32:35,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:32:35,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:32:35,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:32:35,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:32:35" (1/1) ... [2021-11-25 19:32:35,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454f8baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:35, skipping insertion in model container [2021-11-25 19:32:35,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:32:35" (1/1) ... [2021-11-25 19:32:35,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:32:35,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:32:36,005 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_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2021-11-25 19:32:36,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:32:36,036 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:32:36,060 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_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2021-11-25 19:32:36,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:32:36,083 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:32:36,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36 WrapperNode [2021-11-25 19:32:36,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:32:36,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:32:36,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:32:36,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:32:36,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (1/1) ... [2021-11-25 19:32:36,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (1/1) ... [2021-11-25 19:32:36,117 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2021-11-25 19:32:36,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:32:36,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:32:36,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:32:36,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:32:36,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (1/1) ... [2021-11-25 19:32:36,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (1/1) ... [2021-11-25 19:32:36,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (1/1) ... [2021-11-25 19:32:36,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (1/1) ... [2021-11-25 19:32:36,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (1/1) ... [2021-11-25 19:32:36,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (1/1) ... [2021-11-25 19:32:36,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (1/1) ... [2021-11-25 19:32:36,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:32:36,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:32:36,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:32:36,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:32:36,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (1/1) ... [2021-11-25 19:32:36,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:32:36,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:36,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:32:36,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:32:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:32:36,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:32:36,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:32:36,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:32:36,312 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:32:36,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:32:36,447 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:32:36,468 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:32:36,468 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:32:36,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:32:36 BoogieIcfgContainer [2021-11-25 19:32:36,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:32:36,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:32:36,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:32:36,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:32:36,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:32:35" (1/3) ... [2021-11-25 19:32:36,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c1a162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:32:36, skipping insertion in model container [2021-11-25 19:32:36,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:36" (2/3) ... [2021-11-25 19:32:36,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c1a162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:32:36, skipping insertion in model container [2021-11-25 19:32:36,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:32:36" (3/3) ... [2021-11-25 19:32:36,481 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2021-11-25 19:32:36,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:32:36,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:32:36,547 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:32:36,556 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:32:36,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:32:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 19:32:36,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:36,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 19:32:36,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash 62123654, now seen corresponding path program 1 times [2021-11-25 19:32:36,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:36,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824128188] [2021-11-25 19:32:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:36,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:37,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:37,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824128188] [2021-11-25 19:32:37,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824128188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:37,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:37,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:32:37,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730250019] [2021-11-25 19:32:37,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:37,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:32:37,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:32:37,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:32:37,075 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:37,153 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-11-25 19:32:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:32:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-25 19:32:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:37,165 INFO L225 Difference]: With dead ends: 21 [2021-11-25 19:32:37,165 INFO L226 Difference]: Without dead ends: 7 [2021-11-25 19:32:37,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:32:37,174 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:37,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:32:37,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-25 19:32:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-25 19:32:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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) [2021-11-25 19:32:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-11-25 19:32:37,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-11-25 19:32:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:37,226 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-11-25 19:32:37,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-11-25 19:32:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:32:37,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:37,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:32:37,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:32:37,228 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:37,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1925759241, now seen corresponding path program 1 times [2021-11-25 19:32:37,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:37,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146489930] [2021-11-25 19:32:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:37,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:37,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:37,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146489930] [2021-11-25 19:32:37,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146489930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:37,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094145342] [2021-11-25 19:32:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:37,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:37,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:37,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:37,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:32:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:37,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:32:37,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:37,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:37,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094145342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:37,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406040076] [2021-11-25 19:32:37,730 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:32:37,731 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:37,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:37,743 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:37,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:37,946 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:38,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '96#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= (* 1000000 |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 10) (= (ite (= |ULTIMATE.start_main_~i~0#1| (* 1000000 |ULTIMATE.start_main_~k~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:38,162 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:38,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:38,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-25 19:32:38,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244004208] [2021-11-25 19:32:38,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:38,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:32:38,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:38,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:32:38,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:32:38,167 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2021-11-25 19:32:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:38,209 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-25 19:32:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:32:38,218 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) Word has length 6 [2021-11-25 19:32:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:38,219 INFO L225 Difference]: With dead ends: 12 [2021-11-25 19:32:38,219 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 19:32:38,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:32:38,226 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:38,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:32:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 19:32:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 19:32:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-25 19:32:38,236 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-11-25 19:32:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:38,237 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-25 19:32:38,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2021-11-25 19:32:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-25 19:32:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:32:38,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:38,238 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2021-11-25 19:32:38,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:38,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:38,439 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash -478643031, now seen corresponding path program 2 times [2021-11-25 19:32:38,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:38,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038888098] [2021-11-25 19:32:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:38,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:38,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:38,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038888098] [2021-11-25 19:32:38,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038888098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:38,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665601390] [2021-11-25 19:32:38,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:32:38,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:38,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:38,543 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:38,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:32:38,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:32:38,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:38,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:32:38,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:38,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:38,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665601390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:38,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477905727] [2021-11-25 19:32:38,834 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:32:38,834 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:38,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:38,835 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:38,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:38,958 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:39,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '183#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= (* 1000000 |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 10) (= (ite (= |ULTIMATE.start_main_~i~0#1| (* 1000000 |ULTIMATE.start_main_~k~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:39,165 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:39,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:39,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-25 19:32:39,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666888916] [2021-11-25 19:32:39,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:39,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:32:39,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:39,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:32:39,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:32:39,167 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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) [2021-11-25 19:32:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:39,320 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-11-25 19:32:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:32:39,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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 8 [2021-11-25 19:32:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:39,323 INFO L225 Difference]: With dead ends: 16 [2021-11-25 19:32:39,323 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 19:32:39,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:32:39,326 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:39,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:32:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 19:32:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 19:32:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 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) [2021-11-25 19:32:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-25 19:32:39,337 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2021-11-25 19:32:39,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:39,337 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-25 19:32:39,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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) [2021-11-25 19:32:39,339 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-25 19:32:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:32:39,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:39,341 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1] [2021-11-25 19:32:39,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:39,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:39,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:39,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1135559703, now seen corresponding path program 3 times [2021-11-25 19:32:39,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:39,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49448267] [2021-11-25 19:32:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:39,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:39,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:39,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49448267] [2021-11-25 19:32:39,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49448267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:39,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136510524] [2021-11-25 19:32:39,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:32:39,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:39,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:39,716 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:39,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:32:39,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:32:39,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:39,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:32:39,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:39,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:40,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136510524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:40,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [367118319] [2021-11-25 19:32:40,174 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:32:40,174 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:40,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:40,179 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:40,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:40,270 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:40,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '328#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= (* 1000000 |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 10) (= (ite (= |ULTIMATE.start_main_~i~0#1| (* 1000000 |ULTIMATE.start_main_~k~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:40,470 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:40,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:40,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2021-11-25 19:32:40,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714001726] [2021-11-25 19:32:40,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:40,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:32:40,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:40,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:32:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:32:40,473 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:40,883 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2021-11-25 19:32:40,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:32:40,884 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2021-11-25 19:32:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:40,885 INFO L225 Difference]: With dead ends: 24 [2021-11-25 19:32:40,885 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 19:32:40,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=352, Invalid=980, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:32:40,888 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:40,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 19:32:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 19:32:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 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) [2021-11-25 19:32:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-11-25 19:32:40,901 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2021-11-25 19:32:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:40,901 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-11-25 19:32:40,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-11-25 19:32:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:32:40,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:40,902 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1] [2021-11-25 19:32:40,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:41,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:41,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:41,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:41,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1304189545, now seen corresponding path program 4 times [2021-11-25 19:32:41,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:41,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927625935] [2021-11-25 19:32:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:41,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:41,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:41,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927625935] [2021-11-25 19:32:41,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927625935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:41,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654289702] [2021-11-25 19:32:41,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:32:41,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:41,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:41,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:41,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:32:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:41,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:32:41,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:41,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:42,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654289702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:42,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851374449] [2021-11-25 19:32:42,409 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:32:42,409 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:42,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:42,410 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:42,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:42,478 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:42,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= (* 1000000 |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 10) (= (ite (= |ULTIMATE.start_main_~i~0#1| (* 1000000 |ULTIMATE.start_main_~k~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:42,710 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:42,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:42,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2021-11-25 19:32:42,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443140540] [2021-11-25 19:32:42,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:42,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 19:32:42,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 19:32:42,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1129, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 19:32:42,713 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:43,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:43,913 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-11-25 19:32:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 19:32:43,914 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 19:32:43,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:43,915 INFO L225 Difference]: With dead ends: 40 [2021-11-25 19:32:43,915 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 19:32:43,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1388, Invalid=3304, Unknown=0, NotChecked=0, Total=4692 [2021-11-25 19:32:43,920 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:43,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 19:32:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-25 19:32:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 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) [2021-11-25 19:32:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-11-25 19:32:43,930 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 20 [2021-11-25 19:32:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:43,931 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-11-25 19:32:43,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-11-25 19:32:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:32:43,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:43,933 INFO L514 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1] [2021-11-25 19:32:43,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 19:32:44,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:44,147 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:44,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash 708843369, now seen corresponding path program 5 times [2021-11-25 19:32:44,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:44,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777139692] [2021-11-25 19:32:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:44,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:44,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:44,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777139692] [2021-11-25 19:32:44,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777139692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:44,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895671400] [2021-11-25 19:32:44,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:32:44,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:44,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:44,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:44,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:32:44,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-25 19:32:44,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:44,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 19:32:44,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:45,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:47,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895671400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:47,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778436688] [2021-11-25 19:32:47,310 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:32:47,311 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:47,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:47,311 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:47,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:47,364 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:47,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1066#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= (* 1000000 |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 10) (= (ite (= |ULTIMATE.start_main_~i~0#1| (* 1000000 |ULTIMATE.start_main_~k~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:47,665 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:47,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:47,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2021-11-25 19:32:47,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073547869] [2021-11-25 19:32:47,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:47,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-25 19:32:47,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:47,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-25 19:32:47,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1607, Invalid=3505, Unknown=0, NotChecked=0, Total=5112 [2021-11-25 19:32:47,672 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:51,246 INFO L93 Difference]: Finished difference Result 72 states and 103 transitions. [2021-11-25 19:32:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-25 19:32:51,248 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 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 36 [2021-11-25 19:32:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:51,249 INFO L225 Difference]: With dead ends: 72 [2021-11-25 19:32:51,250 INFO L226 Difference]: Without dead ends: 69 [2021-11-25 19:32:51,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3575 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5572, Invalid=11984, Unknown=0, NotChecked=0, Total=17556 [2021-11-25 19:32:51,257 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:51,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:32:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-25 19:32:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-25 19:32:51,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-11-25 19:32:51,271 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 36 [2021-11-25 19:32:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:51,272 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-11-25 19:32:51,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-11-25 19:32:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 19:32:51,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:51,275 INFO L514 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1] [2021-11-25 19:32:51,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:51,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:32:51,480 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:51,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1610191209, now seen corresponding path program 6 times [2021-11-25 19:32:51,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:51,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711677764] [2021-11-25 19:32:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:51,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:53,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:53,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711677764] [2021-11-25 19:32:53,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711677764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:53,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015332166] [2021-11-25 19:32:53,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:32:53,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:53,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:53,785 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:53,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:32:54,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:32:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 19:32:54,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:54,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:33:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:01,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015332166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:33:01,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771570319] [2021-11-25 19:33:01,291 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:33:01,291 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:33:01,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:33:01,292 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:33:01,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:33:01,356 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:33:01,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1995#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= (* 1000000 |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 10) (= (ite (= |ULTIMATE.start_main_~i~0#1| (* 1000000 |ULTIMATE.start_main_~k~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:33:01,845 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:33:01,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:33:01,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2021-11-25 19:33:01,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951123600] [2021-11-25 19:33:01,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:33:01,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-25 19:33:01,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:01,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-25 19:33:01,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6263, Invalid=12097, Unknown=0, NotChecked=0, Total=18360 [2021-11-25 19:33:01,863 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 132 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:17,234 INFO L93 Difference]: Finished difference Result 136 states and 199 transitions. [2021-11-25 19:33:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-25 19:33:17,235 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 0 states have call successors, (0), 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 68 [2021-11-25 19:33:17,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:17,240 INFO L225 Difference]: With dead ends: 136 [2021-11-25 19:33:17,240 INFO L226 Difference]: Without dead ends: 133 [2021-11-25 19:33:17,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14311 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=22388, Invalid=45472, Unknown=0, NotChecked=0, Total=67860 [2021-11-25 19:33:17,251 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:17,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:33:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-25 19:33:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-25 19:33:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-11-25 19:33:17,272 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 68 [2021-11-25 19:33:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:17,273 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-11-25 19:33:17,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:17,273 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-11-25 19:33:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-25 19:33:17,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:17,277 INFO L514 BasicCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1] [2021-11-25 19:33:17,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:33:17,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:33:17,496 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:33:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1848935785, now seen corresponding path program 7 times [2021-11-25 19:33:17,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:17,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278585099] [2021-11-25 19:33:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:17,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:33:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:25,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:33:25,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278585099] [2021-11-25 19:33:25,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278585099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:33:25,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801249253] [2021-11-25 19:33:25,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:33:25,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:33:25,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:33:25,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:33:25,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:33:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:33:28,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-25 19:33:28,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:33:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:29,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:33:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:52,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801249253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:33:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [776268975] [2021-11-25 19:33:52,417 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:33:52,418 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:33:52,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:33:52,418 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:33:52,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:33:52,478 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:33:53,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3820#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= (* 1000000 |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 10) (= (ite (= |ULTIMATE.start_main_~i~0#1| (* 1000000 |ULTIMATE.start_main_~k~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:33:53,204 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:33:53,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:33:53,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130, 130] total 260 [2021-11-25 19:33:53,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211935953] [2021-11-25 19:33:53,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:33:53,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 260 states [2021-11-25 19:33:53,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 260 interpolants. [2021-11-25 19:33:53,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24791, Invalid=44641, Unknown=0, NotChecked=0, Total=69432 [2021-11-25 19:33:53,217 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 260 states, 260 states have (on average 1.0192307692307692) internal successors, (265), 260 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:35:10,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:35:10,432 INFO L93 Difference]: Finished difference Result 264 states and 391 transitions. [2021-11-25 19:35:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-11-25 19:35:10,433 INFO L78 Accepts]: Start accepts. Automaton has has 260 states, 260 states have (on average 1.0192307692307692) internal successors, (265), 260 states have internal predecessors, (265), 0 states have call successors, (0), 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 132 [2021-11-25 19:35:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:35:10,436 INFO L225 Difference]: With dead ends: 264 [2021-11-25 19:35:10,436 INFO L226 Difference]: Without dead ends: 261 [2021-11-25 19:35:10,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57287 ImplicationChecksByTransitivity, 105.8s TimeCoverageRelationStatistics Valid=89812, Invalid=176960, Unknown=0, NotChecked=0, Total=266772 [2021-11-25 19:35:10,453 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:35:10,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:35:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-25 19:35:10,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-11-25 19:35:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0038461538461538) internal successors, (261), 260 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:35:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2021-11-25 19:35:10,493 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 132 [2021-11-25 19:35:10,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:35:10,494 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2021-11-25 19:35:10,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 260 states, 260 states have (on average 1.0192307692307692) internal successors, (265), 260 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:35:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2021-11-25 19:35:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-25 19:35:10,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:35:10,502 INFO L514 BasicCegarLoop]: trace histogram [255, 1, 1, 1, 1, 1] [2021-11-25 19:35:10,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:10,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:10,716 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:35:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:35:10,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1781895831, now seen corresponding path program 8 times [2021-11-25 19:35:10,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:35:10,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987033586] [2021-11-25 19:35:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:35:10,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:35:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:35:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 32640 backedges. 0 proven. 32640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:41,776 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:35:41,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987033586] [2021-11-25 19:35:41,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987033586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:35:41,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632737815] [2021-11-25 19:35:41,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:35:41,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:41,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:35:41,779 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:35:41,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:35:42,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 129 check-sat command(s) [2021-11-25 19:35:42,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:42,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 258 conjunts are in the unsatisfiable core [2021-11-25 19:35:42,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 32640 backedges. 0 proven. 32640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:43,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:36:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 32640 backedges. 0 proven. 32640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:58,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632737815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:36:58,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [844044466] [2021-11-25 19:36:58,107 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:36:58,108 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:36:58,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:36:58,108 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:36:58,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:36:58,148 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:36:59,290 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7437#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= (* 1000000 |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~k~0#1| 10) (= (ite (= |ULTIMATE.start_main_~i~0#1| (* 1000000 |ULTIMATE.start_main_~k~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:36:59,290 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:36:59,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:36:59,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [258, 258, 258] total 516 [2021-11-25 19:36:59,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241445369] [2021-11-25 19:36:59,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:36:59,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 516 states [2021-11-25 19:36:59,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 516 interpolants. [2021-11-25 19:36:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98711, Invalid=171169, Unknown=0, NotChecked=0, Total=269880 [2021-11-25 19:36:59,315 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand has 516 states, 516 states have (on average 1.0096899224806202) internal successors, (521), 516 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:43:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:51,564 INFO L93 Difference]: Finished difference Result 520 states and 775 transitions. [2021-11-25 19:43:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 514 states. [2021-11-25 19:43:51,565 INFO L78 Accepts]: Start accepts. Automaton has has 516 states, 516 states have (on average 1.0096899224806202) internal successors, (521), 516 states have internal predecessors, (521), 0 states have call successors, (0), 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 260 [2021-11-25 19:43:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:51,568 INFO L225 Difference]: With dead ends: 520 [2021-11-25 19:43:51,568 INFO L226 Difference]: Without dead ends: 517 [2021-11-25 19:43:51,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1545 GetRequests, 517 SyntacticMatches, 1 SemanticMatches, 1027 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229255 ImplicationChecksByTransitivity, 504.5s TimeCoverageRelationStatistics Valid=359828, Invalid=697984, Unknown=0, NotChecked=0, Total=1057812 [2021-11-25 19:43:51,625 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:51,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:43:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-25 19:43:51,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2021-11-25 19:43:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.001937984496124) internal successors, (517), 516 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:43:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 517 transitions. [2021-11-25 19:43:51,671 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 517 transitions. Word has length 260 [2021-11-25 19:43:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:51,671 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 517 transitions. [2021-11-25 19:43:51,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 516 states, 516 states have (on average 1.0096899224806202) internal successors, (521), 516 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:43:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 517 transitions. [2021-11-25 19:43:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-11-25 19:43:51,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:51,685 INFO L514 BasicCegarLoop]: trace histogram [511, 1, 1, 1, 1, 1] [2021-11-25 19:43:51,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:43:51,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e826df5-9d84-4dfa-9eaa-db90b3e59d34/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:51,912 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:43:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash 292961641, now seen corresponding path program 9 times [2021-11-25 19:43:51,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:51,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771179571] [2021-11-25 19:43:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:51,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:44:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat