./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:40:03,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:40:03,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:40:03,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:40:03,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:40:03,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:40:03,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:40:03,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:40:03,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:40:03,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:40:03,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:40:03,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:40:03,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:40:03,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:40:03,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:40:03,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:40:03,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:40:03,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:40:03,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:40:03,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:40:03,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:40:03,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:40:03,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:40:03,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:40:03,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:40:03,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:40:03,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:40:03,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:40:03,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:40:03,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:40:03,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:40:03,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:40:03,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:40:03,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:40:03,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:40:03,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:40:03,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:40:03,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:40:03,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:40:03,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:40:03,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:40:03,547 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:40:03,594 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:40:03,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:40:03,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:40:03,595 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:40:03,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:40:03,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:40:03,597 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:40:03,597 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:40:03,598 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:40:03,598 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:40:03,599 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:40:03,600 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:40:03,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:40:03,601 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:40:03,601 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:40:03,601 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:40:03,602 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:40:03,602 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:40:03,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:40:03,603 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:40:03,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:40:03,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:40:03,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:40:03,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:40:03,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:40:03,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:40:03,607 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:40:03,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:40:03,608 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:40:03,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:40:03,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:40:03,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:40:03,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:40:03,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:40:03,610 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:40:03,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:40:03,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:40:03,611 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:40:03,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:40:03,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:40:03,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:40:03,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac [2022-11-19 06:40:03,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:40:03,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:40:03,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:40:03,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:40:03,976 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:40:03,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2022-11-19 06:40:04,076 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/data/edddfe8f2/5727a6d659e841f49a5c38b2f0bf3735/FLAG9fd5578d5 [2022-11-19 06:40:04,647 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:40:04,648 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2022-11-19 06:40:04,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/data/edddfe8f2/5727a6d659e841f49a5c38b2f0bf3735/FLAG9fd5578d5 [2022-11-19 06:40:04,990 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/data/edddfe8f2/5727a6d659e841f49a5c38b2f0bf3735 [2022-11-19 06:40:04,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:40:04,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:40:05,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:40:05,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:40:05,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:40:05,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:40:04" (1/1) ... [2022-11-19 06:40:05,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de0ffef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05, skipping insertion in model container [2022-11-19 06:40:05,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:40:04" (1/1) ... [2022-11-19 06:40:05,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:40:05,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:40:05,298 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2022-11-19 06:40:05,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:40:05,332 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:40:05,344 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2022-11-19 06:40:05,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:40:05,368 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:40:05,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05 WrapperNode [2022-11-19 06:40:05,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:40:05,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:40:05,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:40:05,370 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:40:05,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,408 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-11-19 06:40:05,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:40:05,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:40:05,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:40:05,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:40:05,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,434 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:40:05,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:40:05,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:40:05,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:40:05,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (1/1) ... [2022-11-19 06:40:05,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:40:05,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:05,483 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:40:05,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:40:05,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:40:05,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:40:05,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:40:05,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:40:05,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:40:05,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:40:05,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:40:05,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:40:05,618 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:40:05,620 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:40:05,802 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:40:05,859 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:40:05,859 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 06:40:05,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:40:05 BoogieIcfgContainer [2022-11-19 06:40:05,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:40:05,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:40:05,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:40:05,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:40:05,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:40:04" (1/3) ... [2022-11-19 06:40:05,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5724abd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:40:05, skipping insertion in model container [2022-11-19 06:40:05,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:40:05" (2/3) ... [2022-11-19 06:40:05,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5724abd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:40:05, skipping insertion in model container [2022-11-19 06:40:05,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:40:05" (3/3) ... [2022-11-19 06:40:05,875 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr.c [2022-11-19 06:40:05,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:40:05,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:40:05,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:40:05,976 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71fb4054, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:40:05,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:40:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:40:05,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:05,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:40:05,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:06,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:06,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1387171958, now seen corresponding path program 1 times [2022-11-19 06:40:06,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:06,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142820340] [2022-11-19 06:40:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:06,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:40:06,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142820340] [2022-11-19 06:40:06,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142820340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:40:06,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:40:06,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:40:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127116143] [2022-11-19 06:40:06,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:40:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:40:06,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:06,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:40:06,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:40:06,630 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:06,717 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-11-19 06:40:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:40:06,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 [2022-11-19 06:40:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:06,730 INFO L225 Difference]: With dead ends: 17 [2022-11-19 06:40:06,731 INFO L226 Difference]: Without dead ends: 9 [2022-11-19 06:40:06,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:40:06,738 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:06,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:40:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-19 06:40:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-19 06:40:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) 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) [2022-11-19 06:40:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-19 06:40:06,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-11-19 06:40:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:06,779 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-19 06:40:06,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:06,780 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-19 06:40:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:40:06,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:06,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:06,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:40:06,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash -110753083, now seen corresponding path program 1 times [2022-11-19 06:40:06,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118775615] [2022-11-19 06:40:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:06,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:40:06,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:06,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118775615] [2022-11-19 06:40:06,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118775615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:40:06,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:40:06,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:40:06,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218077150] [2022-11-19 06:40:06,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:40:06,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:40:06,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:40:06,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:40:06,942 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:06,992 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2022-11-19 06:40:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:40:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:40:06,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:06,996 INFO L225 Difference]: With dead ends: 15 [2022-11-19 06:40:06,996 INFO L226 Difference]: Without dead ends: 10 [2022-11-19 06:40:06,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:40:06,999 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:07,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:40:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-19 06:40:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-19 06:40:07,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-19 06:40:07,012 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-19 06:40:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:07,014 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-19 06:40:07,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-19 06:40:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:40:07,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:07,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:07,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:40:07,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:07,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:07,022 INFO L85 PathProgramCache]: Analyzing trace with hash 849702428, now seen corresponding path program 1 times [2022-11-19 06:40:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:07,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257295948] [2022-11-19 06:40:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:07,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:40:07,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:07,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257295948] [2022-11-19 06:40:07,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257295948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:07,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390908904] [2022-11-19 06:40:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:07,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:07,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:07,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:07,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:40:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:40:07,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:40:07,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:40:07,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390908904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:07,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567911390] [2022-11-19 06:40:07,403 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:40:07,404 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:07,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:07,414 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:07,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:07,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:07,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:07,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:07,707 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:40:07,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:40:07,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:07,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:07,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:07,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-19 06:40:07,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:07,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:07,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-11-19 06:40:08,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:08,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:08,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,276 INFO L321 Elim1Store]: treesize reduction 243, result has 15.9 percent of original size [2022-11-19 06:40:08,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 436 treesize of output 435 [2022-11-19 06:40:08,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,740 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-19 06:40:08,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2022-11-19 06:40:08,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,853 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:08,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:40:08,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:08,978 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:08,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:40:09,050 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:09,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '141#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:40:09,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:09,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:40:09,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-19 06:40:09,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845766490] [2022-11-19 06:40:09,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:09,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:40:09,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:40:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:40:09,318 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:09,359 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-11-19 06:40:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:40:09,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:40:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:09,361 INFO L225 Difference]: With dead ends: 20 [2022-11-19 06:40:09,361 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 06:40:09,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:40:09,363 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:09,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:40:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 06:40:09,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-19 06:40:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:09,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-19 06:40:09,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-11-19 06:40:09,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:09,368 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-19 06:40:09,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:09,368 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-19 06:40:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 06:40:09,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:09,369 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:09,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:09,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:09,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash 193659703, now seen corresponding path program 2 times [2022-11-19 06:40:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:09,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368224639] [2022-11-19 06:40:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:09,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:40:09,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368224639] [2022-11-19 06:40:09,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368224639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:09,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816345252] [2022-11-19 06:40:09,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:40:09,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:09,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:09,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:09,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:40:09,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:40:09,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:40:09,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:40:10,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:40:10,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:40:10,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816345252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:10,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166326259] [2022-11-19 06:40:10,123 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:40:10,123 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:10,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:10,124 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:10,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:10,311 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:40:10,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:40:10,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:10,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:10,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:10,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-19 06:40:10,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:10,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:10,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-11-19 06:40:10,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:10,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:10,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:10,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:10,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:10,689 INFO L321 Elim1Store]: treesize reduction 243, result has 15.9 percent of original size [2022-11-19 06:40:10,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 436 treesize of output 435 [2022-11-19 06:40:11,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:11,140 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-19 06:40:11,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2022-11-19 06:40:11,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:11,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:11,209 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:11,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:40:11,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:11,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:11,301 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:11,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:40:11,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:11,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '270#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:40:11,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:11,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:40:11,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2022-11-19 06:40:11,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489764729] [2022-11-19 06:40:11,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:11,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:40:11,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:11,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:40:11,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:40:11,605 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:11,801 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-11-19 06:40:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 06:40:11,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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) Word has length 11 [2022-11-19 06:40:11,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:11,805 INFO L225 Difference]: With dead ends: 55 [2022-11-19 06:40:11,806 INFO L226 Difference]: Without dead ends: 48 [2022-11-19 06:40:11,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2022-11-19 06:40:11,810 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 118 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:11,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 27 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:40:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-19 06:40:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 22. [2022-11-19 06:40:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-19 06:40:11,822 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2022-11-19 06:40:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:11,822 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-19 06:40:11,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-19 06:40:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 06:40:11,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:11,825 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:11,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:12,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:12,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:12,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1909590116, now seen corresponding path program 3 times [2022-11-19 06:40:12,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:12,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019246164] [2022-11-19 06:40:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:12,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:40:12,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:12,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019246164] [2022-11-19 06:40:12,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019246164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:12,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869744937] [2022-11-19 06:40:12,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:40:12,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:12,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:12,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:12,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:40:12,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:40:12,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:40:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:40:12,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:40:12,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:40:13,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869744937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:13,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1236503204] [2022-11-19 06:40:13,002 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:40:13,002 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:13,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:13,003 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:13,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:13,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,171 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:40:13,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:40:13,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-19 06:40:13,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-11-19 06:40:13,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:13,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:13,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:13,492 INFO L321 Elim1Store]: treesize reduction 243, result has 15.9 percent of original size [2022-11-19 06:40:13,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 436 treesize of output 435 [2022-11-19 06:40:13,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:13,862 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-19 06:40:13,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2022-11-19 06:40:13,927 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-19 06:40:13,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2022-11-19 06:40:13,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:13,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:14,032 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:14,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:40:14,085 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:14,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '546#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:40:14,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:14,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:40:14,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2022-11-19 06:40:14,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514358668] [2022-11-19 06:40:14,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:14,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 06:40:14,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:14,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 06:40:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2022-11-19 06:40:14,434 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:14,919 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2022-11-19 06:40:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 06:40:14,920 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 06:40:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:14,924 INFO L225 Difference]: With dead ends: 124 [2022-11-19 06:40:14,924 INFO L226 Difference]: Without dead ends: 111 [2022-11-19 06:40:14,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=607, Invalid=953, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 06:40:14,926 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 302 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:14,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 60 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:40:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-19 06:40:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 40. [2022-11-19 06:40:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-11-19 06:40:14,945 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2022-11-19 06:40:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:14,945 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-11-19 06:40:14,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-11-19 06:40:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 06:40:14,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:14,949 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:14,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:15,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:15,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:15,162 INFO L85 PathProgramCache]: Analyzing trace with hash 726013834, now seen corresponding path program 4 times [2022-11-19 06:40:15,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:15,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803635576] [2022-11-19 06:40:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:15,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-19 06:40:16,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:16,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803635576] [2022-11-19 06:40:16,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803635576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999219917] [2022-11-19 06:40:16,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:40:16,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:16,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:16,169 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:16,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:40:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:16,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:40:16,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-19 06:40:16,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-19 06:40:17,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999219917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:17,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172646147] [2022-11-19 06:40:17,439 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:40:17,440 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:17,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:17,440 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:17,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,579 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-19 06:40:17,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-19 06:40:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,787 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:40:17,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:40:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-19 06:40:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:18,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:18,078 INFO L321 Elim1Store]: treesize reduction 139, result has 12.6 percent of original size [2022-11-19 06:40:18,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 433 [2022-11-19 06:40:18,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:18,209 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-19 06:40:18,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2022-11-19 06:40:18,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:18,311 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:18,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:40:18,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:18,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:18,405 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:18,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:40:18,461 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:18,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1099#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:40:18,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:18,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:40:18,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2022-11-19 06:40:18,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846826980] [2022-11-19 06:40:18,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:18,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-19 06:40:18,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-19 06:40:18,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 06:40:18,755 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:18,871 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2022-11-19 06:40:18,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 06:40:18,872 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-19 06:40:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:18,873 INFO L225 Difference]: With dead ends: 80 [2022-11-19 06:40:18,873 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 06:40:18,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 06:40:18,875 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:18,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:40:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 06:40:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-19 06:40:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-11-19 06:40:18,885 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 38 [2022-11-19 06:40:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:18,885 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-11-19 06:40:18,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-11-19 06:40:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 06:40:18,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:18,888 INFO L195 NwaCegarLoop]: trace histogram [34, 16, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:18,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:19,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:19,095 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:19,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:19,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1878074902, now seen corresponding path program 5 times [2022-11-19 06:40:19,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:19,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665353217] [2022-11-19 06:40:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:19,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-19 06:40:21,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665353217] [2022-11-19 06:40:21,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665353217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495524706] [2022-11-19 06:40:21,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:40:21,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:21,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:21,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:21,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:40:29,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-19 06:40:29,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:40:29,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:40:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-11-19 06:40:29,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-11-19 06:40:30,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495524706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:30,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1316917920] [2022-11-19 06:40:30,673 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:40:30,674 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:30,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:30,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:30,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:30,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:30,828 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:40:30,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:40:30,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:30,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:30,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-19 06:40:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:30,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:30,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-11-19 06:40:31,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:31,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:31,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:31,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:31,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:31,176 INFO L321 Elim1Store]: treesize reduction 243, result has 15.9 percent of original size [2022-11-19 06:40:31,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 436 treesize of output 435 [2022-11-19 06:40:31,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:31,759 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-19 06:40:31,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2022-11-19 06:40:31,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:31,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:31,821 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:31,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:40:31,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:31,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:31,910 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:31,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:40:31,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:33,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1768#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:40:33,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:33,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:40:33,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19, 19] total 72 [2022-11-19 06:40:33,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926192604] [2022-11-19 06:40:33,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:33,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-19 06:40:33,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-19 06:40:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2629, Invalid=3223, Unknown=0, NotChecked=0, Total=5852 [2022-11-19 06:40:33,022 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:35,757 INFO L93 Difference]: Finished difference Result 385 states and 442 transitions. [2022-11-19 06:40:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-19 06:40:35,759 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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 56 [2022-11-19 06:40:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:35,761 INFO L225 Difference]: With dead ends: 385 [2022-11-19 06:40:35,762 INFO L226 Difference]: Without dead ends: 363 [2022-11-19 06:40:35,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 110 SyntacticMatches, 17 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5666 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4729, Invalid=7703, Unknown=0, NotChecked=0, Total=12432 [2022-11-19 06:40:35,768 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1069 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:35,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 177 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:40:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-19 06:40:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 112. [2022-11-19 06:40:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-11-19 06:40:35,788 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 56 [2022-11-19 06:40:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:35,789 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-11-19 06:40:35,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:40:35,789 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-11-19 06:40:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 06:40:35,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:35,791 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:35,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:35,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:35,992 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash -98618998, now seen corresponding path program 6 times [2022-11-19 06:40:35,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:35,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48372919] [2022-11-19 06:40:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2022-11-19 06:40:41,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48372919] [2022-11-19 06:40:41,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48372919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395191062] [2022-11-19 06:40:41,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:40:41,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:41,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:41,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:47:29,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:47:29,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:47:29,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-19 06:47:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:47:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2022-11-19 06:47:31,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:47:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2022-11-19 06:47:35,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395191062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:47:35,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035684251] [2022-11-19 06:47:35,893 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:47:35,893 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:47:35,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:47:35,893 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:47:35,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:47:35,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,037 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-19 06:47:36,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-19 06:47:36,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,164 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:47:36,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:47:36,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-19 06:47:36,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:36,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:36,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:36,372 INFO L321 Elim1Store]: treesize reduction 139, result has 12.6 percent of original size [2022-11-19 06:47:36,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 433 [2022-11-19 06:47:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:36,469 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-19 06:47:36,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2022-11-19 06:47:36,553 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-19 06:47:36,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2022-11-19 06:47:36,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:36,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:36,626 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:47:36,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:47:36,665 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:47:36,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3439#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:47:36,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:47:36,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:47:36,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 162 [2022-11-19 06:47:36,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185223318] [2022-11-19 06:47:36,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:47:36,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-11-19 06:47:36,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:47:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-11-19 06:47:36,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12160, Invalid=15562, Unknown=0, NotChecked=0, Total=27722 [2022-11-19 06:47:36,969 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:47:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:47:45,713 INFO L93 Difference]: Finished difference Result 799 states and 910 transitions. [2022-11-19 06:47:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-19 06:47:45,714 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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 110 [2022-11-19 06:47:45,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:47:45,717 INFO L225 Difference]: With dead ends: 799 [2022-11-19 06:47:45,717 INFO L226 Difference]: Without dead ends: 741 [2022-11-19 06:47:45,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18434 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=18202, Invalid=29978, Unknown=0, NotChecked=0, Total=48180 [2022-11-19 06:47:45,723 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2315 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1225 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:47:45,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2315 Valid, 408 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1225 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 06:47:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-19 06:47:45,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 220. [2022-11-19 06:47:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:47:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2022-11-19 06:47:45,755 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 110 [2022-11-19 06:47:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:47:45,755 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2022-11-19 06:47:45,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:47:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2022-11-19 06:47:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-19 06:47:45,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:47:45,759 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1] [2022-11-19 06:47:45,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:47:45,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 06:47:45,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:47:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:47:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1978675062, now seen corresponding path program 7 times [2022-11-19 06:47:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:47:45,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904053742] [2022-11-19 06:47:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:47:45,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:47:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:47:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2022-11-19 06:47:59,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:47:59,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904053742] [2022-11-19 06:47:59,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904053742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:47:59,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951378681] [2022-11-19 06:47:59,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:47:59,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:47:59,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:47:59,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:47:59,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:48:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 3157 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-19 06:48:00,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2022-11-19 06:48:06,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:48:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2022-11-19 06:48:21,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951378681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:48:21,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314500118] [2022-11-19 06:48:21,560 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:48:21,560 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:48:21,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:48:21,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:48:21,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:48:21,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,687 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:48:21,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:48:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-19 06:48:21,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-19 06:48:21,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:48:21,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:48:21,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:48:21,925 INFO L321 Elim1Store]: treesize reduction 139, result has 12.6 percent of original size [2022-11-19 06:48:21,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 433 [2022-11-19 06:48:22,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:48:22,042 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-19 06:48:22,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2022-11-19 06:48:22,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:48:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:48:22,110 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:48:22,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:48:22,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:48:22,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:48:22,180 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:48:22,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 06:48:22,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:48:22,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6782#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:48:22,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:48:22,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:48:22,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 322 [2022-11-19 06:48:22,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102563712] [2022-11-19 06:48:22,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:48:22,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 323 states [2022-11-19 06:48:22,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 323 interpolants. [2022-11-19 06:48:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47409, Invalid=59193, Unknown=0, NotChecked=0, Total=106602 [2022-11-19 06:48:22,567 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:48:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:23,636 INFO L93 Difference]: Finished difference Result 440 states and 551 transitions. [2022-11-19 06:48:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-11-19 06:48:23,637 INFO L78 Accepts]: Start accepts. Automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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 218 [2022-11-19 06:48:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:23,643 INFO L225 Difference]: With dead ends: 440 [2022-11-19 06:48:23,643 INFO L226 Difference]: Without dead ends: 328 [2022-11-19 06:48:23,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47918 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=47409, Invalid=59193, Unknown=0, NotChecked=0, Total=106602 [2022-11-19 06:48:23,649 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:23,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:48:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-19 06:48:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-11-19 06:48:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0091743119266054) internal successors, (330), 327 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:48:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2022-11-19 06:48:23,684 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 218 [2022-11-19 06:48:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:23,685 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2022-11-19 06:48:23,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:48:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2022-11-19 06:48:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-19 06:48:23,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:23,691 INFO L195 NwaCegarLoop]: trace histogram [214, 106, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:23,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:48:23,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 06:48:23,908 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:23,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:23,908 INFO L85 PathProgramCache]: Analyzing trace with hash 835196618, now seen corresponding path program 8 times [2022-11-19 06:48:23,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:23,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535010721] [2022-11-19 06:48:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:23,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28676 backedges. 0 proven. 23005 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2022-11-19 06:49:05,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:05,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535010721] [2022-11-19 06:49:05,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535010721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:49:05,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615856430] [2022-11-19 06:49:05,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:49:05,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:05,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:05,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:05,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b42d66-2c50-466a-8969-38486802b9e7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process