./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh --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 ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 --- 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-2329fc7 [2022-12-14 07:47:40,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:47:40,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:47:40,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:47:40,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:47:40,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:47:40,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:47:40,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:47:40,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:47:40,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:47:40,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:47:40,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:47:40,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:47:40,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:47:40,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:47:40,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:47:40,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:47:40,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:47:40,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:47:40,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:47:40,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:47:40,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:47:40,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:47:40,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:47:40,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:47:40,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:47:40,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:47:40,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:47:40,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:47:40,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:47:40,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:47:40,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:47:40,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:47:40,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:47:40,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:47:40,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:47:40,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:47:40,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:47:40,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:47:40,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:47:40,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:47:40,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:47:40,545 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:47:40,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:47:40,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:47:40,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:47:40,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:47:40,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:47:40,547 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:47:40,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:47:40,547 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:47:40,547 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:47:40,547 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:47:40,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:47:40,548 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:47:40,548 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:47:40,548 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:47:40,548 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:47:40,548 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:47:40,548 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:47:40,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:47:40,549 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:47:40,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:47:40,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:47:40,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:47:40,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:47:40,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:47:40,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:47:40,550 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:47:40,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:47:40,551 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:47:40,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:47:40,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:47:40,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:47:40,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:47:40,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:47:40,552 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:47:40,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:47:40,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:47:40,552 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:47:40,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:47:40,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:47:40,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:47:40,553 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_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 [2022-12-14 07:47:40,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:47:40,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:47:40,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:47:40,772 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:47:40,772 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:47:40,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/reducercommutativity/sep05-1.i [2022-12-14 07:47:43,369 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:47:43,527 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:47:43,527 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/sv-benchmarks/c/reducercommutativity/sep05-1.i [2022-12-14 07:47:43,532 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/data/aa1ac58e1/0a1a11b4135944da9f965f1ff5bd4c05/FLAG195712c26 [2022-12-14 07:47:43,544 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/data/aa1ac58e1/0a1a11b4135944da9f965f1ff5bd4c05 [2022-12-14 07:47:43,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:47:43,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:47:43,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:47:43,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:47:43,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:47:43,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb8fdb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43, skipping insertion in model container [2022-12-14 07:47:43,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:47:43,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:47:43,689 WARN L237 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_a1bc73dd-2413-4078-955e-0d3338305c55/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2022-12-14 07:47:43,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:47:43,698 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:47:43,711 WARN L237 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_a1bc73dd-2413-4078-955e-0d3338305c55/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2022-12-14 07:47:43,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:47:43,722 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:47:43,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43 WrapperNode [2022-12-14 07:47:43,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:47:43,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:47:43,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:47:43,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:47:43,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,746 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-12-14 07:47:43,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:47:43,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:47:43,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:47:43,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:47:43,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,762 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:47:43,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:47:43,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:47:43,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:47:43,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (1/1) ... [2022-12-14 07:47:43,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:47:43,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:43,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:47:43,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:47:43,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:47:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:47:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:47:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:47:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:47:43,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:47:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:47:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:47:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-12-14 07:47:43,826 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-12-14 07:47:43,892 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:47:43,894 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:47:44,009 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:47:44,051 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:47:44,051 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:47:44,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:47:44 BoogieIcfgContainer [2022-12-14 07:47:44,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:47:44,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:47:44,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:47:44,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:47:44,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:47:43" (1/3) ... [2022-12-14 07:47:44,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63751f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:47:44, skipping insertion in model container [2022-12-14 07:47:44,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:43" (2/3) ... [2022-12-14 07:47:44,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63751f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:47:44, skipping insertion in model container [2022-12-14 07:47:44,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:47:44" (3/3) ... [2022-12-14 07:47:44,060 INFO L112 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2022-12-14 07:47:44,074 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:47:44,074 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:47:44,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:47:44,114 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;@7b57d935, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:47:44,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:47:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:47:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:47:44,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:44,123 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:47:44,123 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:47:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:44,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1473503099, now seen corresponding path program 1 times [2022-12-14 07:47:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:44,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524366051] [2022-12-14 07:47:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:44,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:47:44,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:44,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524366051] [2022-12-14 07:47:44,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524366051] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:44,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:44,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:47:44,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439433935] [2022-12-14 07:47:44,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:44,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:44,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:44,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:44,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:44,350 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 07:47:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:44,391 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-12-14 07:47:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:44,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-12-14 07:47:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:44,399 INFO L225 Difference]: With dead ends: 33 [2022-12-14 07:47:44,399 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 07:47:44,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:44,403 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:44,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:47:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 07:47:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 07:47:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:47:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-12-14 07:47:44,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-12-14 07:47:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:44,430 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-12-14 07:47:44,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 07:47:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-12-14 07:47:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:47:44,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:44,432 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:47:44,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:47:44,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:47:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:44,433 INFO L85 PathProgramCache]: Analyzing trace with hash -243929398, now seen corresponding path program 1 times [2022-12-14 07:47:44,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:44,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768298266] [2022-12-14 07:47:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:44,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:47:44,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:44,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768298266] [2022-12-14 07:47:44,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768298266] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:47:44,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281841934] [2022-12-14 07:47:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:44,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:44,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:44,527 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:47:44,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:47:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:44,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:47:44,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:47:44,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:44,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281841934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:44,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:47:44,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 07:47:44,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105651818] [2022-12-14 07:47:44,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:44,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:44,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:47:44,624 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:47:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:44,641 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-12-14 07:47:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:44,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-12-14 07:47:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:44,642 INFO L225 Difference]: With dead ends: 29 [2022-12-14 07:47:44,642 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 07:47:44,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:47:44,643 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:44,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:47:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 07:47:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 07:47:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:47:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 07:47:44,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-12-14 07:47:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:44,647 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 07:47:44,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:47:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 07:47:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 07:47:44,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:44,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:47:44,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:47:44,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:44,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:47:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1067045990, now seen corresponding path program 1 times [2022-12-14 07:47:44,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:44,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609936656] [2022-12-14 07:47:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:44,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:47:45,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:45,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609936656] [2022-12-14 07:47:45,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609936656] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:47:45,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586004453] [2022-12-14 07:47:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:45,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:45,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:45,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:47:45,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:47:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:45,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:47:45,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:47:45,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:45,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586004453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:45,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:47:45,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 07:47:45,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459197186] [2022-12-14 07:47:45,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:45,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:45,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:45,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:45,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:47:45,114 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:47:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:45,133 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-12-14 07:47:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-12-14 07:47:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:45,134 INFO L225 Difference]: With dead ends: 27 [2022-12-14 07:47:45,134 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 07:47:45,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:47:45,136 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:45,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:47:45,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 07:47:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 07:47:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:47:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-12-14 07:47:45,141 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-12-14 07:47:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:45,142 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-12-14 07:47:45,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:47:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-12-14 07:47:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:47:45,143 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:45,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:47:45,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:47:45,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:45,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:47:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:45,345 INFO L85 PathProgramCache]: Analyzing trace with hash -384724105, now seen corresponding path program 1 times [2022-12-14 07:47:45,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:45,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014911400] [2022-12-14 07:47:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:45,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 07:47:45,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:45,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014911400] [2022-12-14 07:47:45,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014911400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:47:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450635511] [2022-12-14 07:47:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:45,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:45,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:47:45,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:47:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:45,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:47:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 07:47:45,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 07:47:45,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450635511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:45,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [674214538] [2022-12-14 07:47:45,679 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:47:45,679 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:47:45,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:47:45,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:47:45,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:47:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:45,771 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:47:45,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 07:47:45,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:45,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 07:47:45,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:45,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:47:45,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:45,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:47:45,915 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:47:45,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-12-14 07:47:46,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:47:46,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:46,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 07:47:46,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:46,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 07:47:46,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:46,223 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 07:47:46,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-12-14 07:47:46,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 07:47:46,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 07:47:46,464 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 12 for LOIs [2022-12-14 07:47:46,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:47:51,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 4 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 5 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 07:47:51,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:47:51,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:47:51,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-12-14 07:47:51,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818272334] [2022-12-14 07:47:51,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:47:51,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:47:51,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:47:51,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-12-14 07:47:51,229 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 07:47:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:51,253 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-12-14 07:47:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:47:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-12-14 07:47:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:51,254 INFO L225 Difference]: With dead ends: 36 [2022-12-14 07:47:51,254 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 07:47:51,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-12-14 07:47:51,256 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:51,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:47:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 07:47:51,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 07:47:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:47:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-14 07:47:51,259 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-12-14 07:47:51,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:51,259 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-14 07:47:51,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 07:47:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-14 07:47:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 07:47:51,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:51,261 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:47:51,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:47:51,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:51,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:47:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 957529960, now seen corresponding path program 2 times [2022-12-14 07:47:51,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:51,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226647617] [2022-12-14 07:47:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:51,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:47:51,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226647617] [2022-12-14 07:47:51,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226647617] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:47:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057943130] [2022-12-14 07:47:51,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:47:51,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:51,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:51,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:47:51,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:47:51,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:47:51,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:47:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:47:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:47:51,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:47:51,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057943130] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:51,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163970168] [2022-12-14 07:47:51,640 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:47:51,640 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:47:51,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:47:51,640 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:47:51,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:47:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:51,667 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:47:51,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 07:47:51,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:51,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 07:47:51,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:51,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 07:47:51,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:51,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:51,746 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:47:51,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-12-14 07:47:51,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:47:51,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:51,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 07:47:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:51,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:47:51,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 07:47:51,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:51,960 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 07:47:51,960 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 07:47:51,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 07:47:51,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 07:47:52,077 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 12 for LOIs [2022-12-14 07:47:52,118 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:47:58,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 4 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 5 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 07:47:58,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:47:58,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:47:58,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 07:47:58,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924708458] [2022-12-14 07:47:58,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:47:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:47:58,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:47:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-12-14 07:47:58,865 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 07:47:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:58,886 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-12-14 07:47:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:47:58,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-12-14 07:47:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:58,887 INFO L225 Difference]: With dead ends: 38 [2022-12-14 07:47:58,888 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 07:47:58,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-12-14 07:47:58,889 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:58,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:47:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 07:47:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 07:47:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:47:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 07:47:58,894 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-12-14 07:47:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:58,894 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 07:47:58,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 07:47:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 07:47:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 07:47:58,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:58,896 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:47:58,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 07:47:59,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:59,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:47:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1630373428, now seen corresponding path program 3 times [2022-12-14 07:47:59,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:59,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085051422] [2022-12-14 07:47:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:59,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 07:47:59,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:59,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085051422] [2022-12-14 07:47:59,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085051422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:47:59,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474573239] [2022-12-14 07:47:59,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:47:59,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:59,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:59,212 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:47:59,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:47:59,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:47:59,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:47:59,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:47:59,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 07:47:59,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 07:47:59,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474573239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:59,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1775002773] [2022-12-14 07:47:59,367 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:47:59,367 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:47:59,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:47:59,368 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:47:59,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:47:59,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:59,392 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:47:59,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 07:47:59,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:59,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 07:47:59,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:59,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 07:47:59,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:59,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:59,458 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:47:59,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-12-14 07:47:59,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:47:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:59,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 07:47:59,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:59,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:47:59,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 07:47:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:59,634 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 07:47:59,635 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 07:47:59,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 07:47:59,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 07:47:59,743 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 12 for LOIs [2022-12-14 07:47:59,779 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:48:02,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1136#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 5 |ULTIMATE.start_main_~i~1#1|) (exists ((v_sep_~ret~0_BEFORE_RETURN_17 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_17 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_17 4294967296) (+ (mod v_sep_~ret~0_BEFORE_RETURN_17 4294967296) (- 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:48:02,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:48:02,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:48:02,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2022-12-14 07:48:02,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338786585] [2022-12-14 07:48:02,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:48:02,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:48:02,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:02,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:48:02,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:48:02,382 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:48:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:02,409 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-12-14 07:48:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:48:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2022-12-14 07:48:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:02,410 INFO L225 Difference]: With dead ends: 43 [2022-12-14 07:48:02,410 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 07:48:02,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:48:02,411 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:02,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:48:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 07:48:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 07:48:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:48:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-12-14 07:48:02,414 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 37 [2022-12-14 07:48:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:02,414 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-12-14 07:48:02,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:48:02,415 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-12-14 07:48:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 07:48:02,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:02,415 INFO L195 NwaCegarLoop]: trace histogram [15, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:02,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:48:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:02,617 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1884170985, now seen corresponding path program 4 times [2022-12-14 07:48:02,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:02,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427092114] [2022-12-14 07:48:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:02,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-12-14 07:48:02,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:02,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427092114] [2022-12-14 07:48:02,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427092114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:48:02,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017795028] [2022-12-14 07:48:02,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:48:02,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:02,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:02,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:48:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:48:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-12-14 07:48:02,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:48:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-12-14 07:48:02,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017795028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:48:02,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809900199] [2022-12-14 07:48:02,941 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:48:02,941 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:48:02,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:48:02,941 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:48:02,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:48:02,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:02,960 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 07:48:02,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 07:48:02,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:02,979 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:48:02,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 07:48:02,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:02,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 07:48:03,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:03,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:03,041 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:48:03,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-12-14 07:48:03,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:48:03,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:03,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 07:48:03,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:03,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:48:03,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 07:48:03,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:03,207 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 07:48:03,207 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 07:48:03,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 07:48:03,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 07:48:03,325 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 12 for LOIs [2022-12-14 07:48:03,370 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:48:07,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1512#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 4 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (exists ((v_sep_~ret~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_24 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_24 4294967296) (+ (- 4294967296) (mod v_sep_~ret~0_BEFORE_RETURN_24 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 5 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:48:07,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:48:07,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:48:07,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 8 [2022-12-14 07:48:07,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905852220] [2022-12-14 07:48:07,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:48:07,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:48:07,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:07,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:48:07,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-12-14 07:48:07,978 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 07:48:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:07,994 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-12-14 07:48:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:48:07,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-12-14 07:48:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:07,995 INFO L225 Difference]: With dead ends: 47 [2022-12-14 07:48:07,996 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 07:48:07,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-12-14 07:48:07,997 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:07,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:48:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 07:48:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 07:48:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:48:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-12-14 07:48:07,999 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 41 [2022-12-14 07:48:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:07,999 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-12-14 07:48:08,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 07:48:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-12-14 07:48:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 07:48:08,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:08,000 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:08,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:48:08,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 07:48:08,202 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash -383773958, now seen corresponding path program 5 times [2022-12-14 07:48:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:08,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691982225] [2022-12-14 07:48:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-12-14 07:48:08,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:08,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691982225] [2022-12-14 07:48:08,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691982225] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:48:08,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988214719] [2022-12-14 07:48:08,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:48:08,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:08,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:08,322 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:08,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:48:08,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:48:08,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:48:08,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:48:08,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-14 07:48:08,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:48:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-12-14 07:48:08,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988214719] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:48:08,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1430810683] [2022-12-14 07:48:08,428 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:48:08,428 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:48:08,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:48:08,428 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:48:08,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:48:08,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:08,451 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:48:08,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 07:48:08,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:08,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 07:48:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:08,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:48:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:08,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:48:08,513 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:48:08,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-12-14 07:48:08,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:48:08,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:08,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 07:48:08,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:08,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 07:48:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:08,707 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 07:48:08,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-12-14 07:48:08,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 07:48:08,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 07:48:08,813 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 12 for LOIs [2022-12-14 07:48:08,840 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:48:11,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1903#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~i~2#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 16 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 5 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:48:11,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:48:11,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:48:11,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-12-14 07:48:11,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572035710] [2022-12-14 07:48:11,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:48:11,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:48:11,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:11,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:48:11,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 07:48:11,463 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 07:48:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:11,479 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-12-14 07:48:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:48:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2022-12-14 07:48:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:11,480 INFO L225 Difference]: With dead ends: 42 [2022-12-14 07:48:11,481 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 07:48:11,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 07:48:11,482 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:11,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:48:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 07:48:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 07:48:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:48:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-12-14 07:48:11,485 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 42 [2022-12-14 07:48:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:11,486 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-12-14 07:48:11,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 07:48:11,486 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-12-14 07:48:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 07:48:11,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:11,486 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:11,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:48:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1bc73dd-2413-4078-955e-0d3338305c55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:11,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:11,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1595319962, now seen corresponding path program 6 times [2022-12-14 07:48:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:11,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668892292] [2022-12-14 07:48:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:11,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat