./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba --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 e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 --- 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-b5237d8 [2022-11-22 01:25:38,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:25:38,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:25:38,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:25:38,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:25:38,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:25:38,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:25:38,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:25:38,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:25:38,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:25:38,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:25:38,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:25:38,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:25:38,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:25:38,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:25:38,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:25:38,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:25:38,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:25:38,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:25:38,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:25:38,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:25:38,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:25:38,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:25:38,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:25:38,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:25:38,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:25:38,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:25:38,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:25:38,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:25:38,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:25:38,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:25:38,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:25:38,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:25:38,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:25:38,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:25:38,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:25:38,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:25:38,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:25:38,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:25:38,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:25:38,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:25:38,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:25:38,689 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:25:38,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:25:38,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:25:38,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:25:38,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:25:38,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:25:38,692 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:25:38,692 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:25:38,692 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:25:38,692 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:25:38,693 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:25:38,694 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:25:38,694 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:25:38,694 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:25:38,694 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:25:38,695 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:25:38,695 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:25:38,695 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:25:38,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:25:38,696 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:25:38,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:25:38,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:25:38,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:25:38,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:25:38,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:25:38,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:25:38,698 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:25:38,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:25:38,699 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:25:38,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:25:38,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:25:38,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:25:38,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:25:38,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:25:38,700 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:25:38,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:25:38,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:25:38,701 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:25:38,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:25:38,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:25:38,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:25:38,709 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_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 [2022-11-22 01:25:39,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:25:39,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:25:39,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:25:39,062 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:25:39,062 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:25:39,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/loop-acceleration/array_4.i [2022-11-22 01:25:42,184 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:25:42,376 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:25:42,376 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/sv-benchmarks/c/loop-acceleration/array_4.i [2022-11-22 01:25:42,384 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/data/2771479c8/bdd7e9098d77422ba11318a682f91e8f/FLAG20ce88ac7 [2022-11-22 01:25:42,401 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/data/2771479c8/bdd7e9098d77422ba11318a682f91e8f [2022-11-22 01:25:42,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:25:42,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:25:42,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:25:42,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:25:42,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:25:42,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ec3f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42, skipping insertion in model container [2022-11-22 01:25:42,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:25:42,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:25:42,634 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_0da7b581-6d73-40cc-b164-5bc2ad70b209/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2022-11-22 01:25:42,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:25:42,655 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:25:42,668 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_0da7b581-6d73-40cc-b164-5bc2ad70b209/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2022-11-22 01:25:42,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:25:42,685 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:25:42,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42 WrapperNode [2022-11-22 01:25:42,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:25:42,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:25:42,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:25:42,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:25:42,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,722 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2022-11-22 01:25:42,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:25:42,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:25:42,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:25:42,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:25:42,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:25:42,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:25:42,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:25:42,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:25:42,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (1/1) ... [2022-11-22 01:25:42,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:25:42,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:42,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:25:42,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:25:42,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:25:42,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:25:42,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:25:42,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:25:42,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:25:42,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:25:42,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:25:42,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:25:42,904 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:25:42,906 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:25:43,023 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:25:43,055 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:25:43,055 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 01:25:43,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:25:43 BoogieIcfgContainer [2022-11-22 01:25:43,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:25:43,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:25:43,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:25:43,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:25:43,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:25:42" (1/3) ... [2022-11-22 01:25:43,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b60068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:25:43, skipping insertion in model container [2022-11-22 01:25:43,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:25:42" (2/3) ... [2022-11-22 01:25:43,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b60068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:25:43, skipping insertion in model container [2022-11-22 01:25:43,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:25:43" (3/3) ... [2022-11-22 01:25:43,068 INFO L112 eAbstractionObserver]: Analyzing ICFG array_4.i [2022-11-22 01:25:43,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:25:43,091 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:25:43,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:25:43,146 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;@605646f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:25:43,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:25:43,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:25:43,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:43,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:25:43,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:25:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:43,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1984346455, now seen corresponding path program 1 times [2022-11-22 01:25:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:43,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468392087] [2022-11-22 01:25:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:43,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:43,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:43,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468392087] [2022-11-22 01:25:43,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468392087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:43,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:25:43,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:25:43,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071253736] [2022-11-22 01:25:43,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:43,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:25:43,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:43,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:25:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:25:43,466 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:43,527 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-22 01:25:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:25:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:25:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:43,539 INFO L225 Difference]: With dead ends: 16 [2022-11-22 01:25:43,539 INFO L226 Difference]: Without dead ends: 8 [2022-11-22 01:25:43,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:25:43,570 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:43,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:25:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-22 01:25:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-22 01:25:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-22 01:25:43,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-11-22 01:25:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:43,640 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-22 01:25:43,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-22 01:25:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:25:43,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:43,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:43,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:25:43,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:25:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1393750887, now seen corresponding path program 1 times [2022-11-22 01:25:43,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:43,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913578202] [2022-11-22 01:25:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:43,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:43,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:43,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913578202] [2022-11-22 01:25:43,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913578202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:43,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:25:43,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:25:43,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591253134] [2022-11-22 01:25:43,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:43,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:25:43,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:43,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:25:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:25:43,827 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:43,879 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-22 01:25:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:25:43,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:25:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:43,882 INFO L225 Difference]: With dead ends: 21 [2022-11-22 01:25:43,882 INFO L226 Difference]: Without dead ends: 15 [2022-11-22 01:25:43,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:25:43,884 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:43,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:25:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-22 01:25:43,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 9. [2022-11-22 01:25:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-22 01:25:43,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-11-22 01:25:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:43,890 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-22 01:25:43,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-22 01:25:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:25:43,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:43,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:43,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:25:43,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:25:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:43,893 INFO L85 PathProgramCache]: Analyzing trace with hash -373538295, now seen corresponding path program 1 times [2022-11-22 01:25:43,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:43,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196748971] [2022-11-22 01:25:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:43,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:44,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:44,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196748971] [2022-11-22 01:25:44,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196748971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:44,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475885410] [2022-11-22 01:25:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:44,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:44,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:44,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:25:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:44,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:25:44,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:44,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:25:44,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475885410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:44,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225684430] [2022-11-22 01:25:44,223 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:25:44,224 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:44,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:44,234 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:44,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:44,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:44,391 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:25:44,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:25:44,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:44,448 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:44,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:25:44,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:44,531 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 [2022-11-22 01:25:44,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:44,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:44,756 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:25:44,757 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 [2022-11-22 01:25:44,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:25:44,907 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 [2022-11-22 01:25:44,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:45,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1225684430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:25:45,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:25:45,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2022-11-22 01:25:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528194897] [2022-11-22 01:25:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:25:45,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:25:45,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:25:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:25:45,099 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:45,158 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-11-22 01:25:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:25:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 01:25:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:45,162 INFO L225 Difference]: With dead ends: 15 [2022-11-22 01:25:45,162 INFO L226 Difference]: Without dead ends: 11 [2022-11-22 01:25:45,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:25:45,169 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:45,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:25:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-22 01:25:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-22 01:25:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-22 01:25:45,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-11-22 01:25:45,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:45,187 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-22 01:25:45,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-22 01:25:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:25:45,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:45,189 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:45,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:45,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-22 01:25:45,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:25:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:45,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1754148148, now seen corresponding path program 1 times [2022-11-22 01:25:45,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:45,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865975842] [2022-11-22 01:25:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:45,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:25:45,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:45,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865975842] [2022-11-22 01:25:45,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865975842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:45,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724497696] [2022-11-22 01:25:45,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:45,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:45,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:45,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:45,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:25:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:45,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:25:45,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:25:45,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:25:45,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724497696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:45,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [490754471] [2022-11-22 01:25:45,606 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:25:45,606 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:45,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:45,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:45,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:45,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:45,666 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:45,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:25:45,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:45,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:25:45,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:45,722 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 [2022-11-22 01:25:45,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:45,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:45,844 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:25:45,844 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 [2022-11-22 01:25:45,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:25:45,916 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 [2022-11-22 01:25:46,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:46,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '235#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:25:46,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:46,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:25:46,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-22 01:25:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914713809] [2022-11-22 01:25:46,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:46,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:25:46,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:46,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:25:46,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:25:46,319 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:46,394 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-11-22 01:25:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:25:46,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:25:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:46,398 INFO L225 Difference]: With dead ends: 40 [2022-11-22 01:25:46,398 INFO L226 Difference]: Without dead ends: 32 [2022-11-22 01:25:46,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:25:46,401 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:46,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:25:46,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-22 01:25:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 14. [2022-11-22 01:25:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-22 01:25:46,411 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-11-22 01:25:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:46,411 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-22 01:25:46,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-22 01:25:46,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:25:46,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:46,412 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:46,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:46,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:46,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:25:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:46,619 INFO L85 PathProgramCache]: Analyzing trace with hash -680716964, now seen corresponding path program 2 times [2022-11-22 01:25:46,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:46,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308513395] [2022-11-22 01:25:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:46,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:25:46,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:46,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308513395] [2022-11-22 01:25:46,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308513395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024245625] [2022-11-22 01:25:46,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:25:46,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:46,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:46,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:46,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:25:46,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:25:46,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:25:46,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:25:46,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:25:46,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:25:46,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024245625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:46,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9194370] [2022-11-22 01:25:46,940 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:25:46,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:46,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:46,940 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:46,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:46,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:46,970 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:46,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:25:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:46,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:25:47,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:47,005 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 [2022-11-22 01:25:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:47,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:47,114 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:25:47,114 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 [2022-11-22 01:25:47,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:25:47,236 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 [2022-11-22 01:25:47,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:47,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:25:47,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:47,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:25:47,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-22 01:25:47,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580884876] [2022-11-22 01:25:47,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:47,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:25:47,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:47,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:25:47,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:25:47,595 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:47,665 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-22 01:25:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:25:47,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 01:25:47,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:47,666 INFO L225 Difference]: With dead ends: 28 [2022-11-22 01:25:47,666 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 01:25:47,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:25:47,667 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:47,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 11 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:25:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 01:25:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-22 01:25:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-22 01:25:47,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2022-11-22 01:25:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:47,674 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-22 01:25:47,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-22 01:25:47,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:25:47,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:47,675 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:47,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:47,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:47,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:25:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:47,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1146847013, now seen corresponding path program 3 times [2022-11-22 01:25:47,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579388832] [2022-11-22 01:25:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:47,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:25:47,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:47,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579388832] [2022-11-22 01:25:47,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579388832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:47,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463572057] [2022-11-22 01:25:47,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:25:47,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:47,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:47,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:47,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:25:48,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:25:48,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:25:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:25:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:25:48,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:25:48,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463572057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:48,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [59789572] [2022-11-22 01:25:48,130 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:25:48,130 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:48,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:48,131 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:48,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:48,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:48,166 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:48,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:25:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:48,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:25:48,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:48,203 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 [2022-11-22 01:25:48,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:48,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:48,283 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:25:48,284 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 [2022-11-22 01:25:48,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:25:48,377 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 [2022-11-22 01:25:48,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:48,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '594#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:25:48,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:48,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:25:48,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-22 01:25:48,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774502844] [2022-11-22 01:25:48,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:48,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:25:48,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:25:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:25:48,747 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:48,841 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-11-22 01:25:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:25:48,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-22 01:25:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:48,843 INFO L225 Difference]: With dead ends: 76 [2022-11-22 01:25:48,843 INFO L226 Difference]: Without dead ends: 62 [2022-11-22 01:25:48,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:25:48,844 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 73 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:48,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:25:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-22 01:25:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 26. [2022-11-22 01:25:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-11-22 01:25:48,852 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2022-11-22 01:25:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:48,852 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-11-22 01:25:48,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-11-22 01:25:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 01:25:48,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:48,854 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:48,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 01:25:49,059 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:25:49,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash 940968229, now seen corresponding path program 4 times [2022-11-22 01:25:49,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:49,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064060888] [2022-11-22 01:25:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:49,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:25:49,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:49,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064060888] [2022-11-22 01:25:49,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064060888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:49,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136992750] [2022-11-22 01:25:49,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:25:49,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:49,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:49,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:49,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:25:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:49,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:25:49,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:25:49,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:25:49,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136992750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:49,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996473285] [2022-11-22 01:25:49,645 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:25:49,645 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:49,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:49,646 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:49,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:49,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:49,671 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:25:49,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:25:49,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:49,698 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:49,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:25:49,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:49,720 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 [2022-11-22 01:25:49,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:49,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:49,790 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:25:49,791 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 [2022-11-22 01:25:49,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:25:49,836 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 [2022-11-22 01:25:49,884 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:50,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '913#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:25:50,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:50,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:25:50,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-22 01:25:50,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137161608] [2022-11-22 01:25:50,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:50,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 01:25:50,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:50,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 01:25:50,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:25:50,219 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:50,414 INFO L93 Difference]: Finished difference Result 160 states and 173 transitions. [2022-11-22 01:25:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:25:50,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-22 01:25:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:50,416 INFO L225 Difference]: With dead ends: 160 [2022-11-22 01:25:50,416 INFO L226 Difference]: Without dead ends: 146 [2022-11-22 01:25:50,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:25:50,417 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 317 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:50,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 60 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:25:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-22 01:25:50,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 38. [2022-11-22 01:25:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-11-22 01:25:50,434 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 25 [2022-11-22 01:25:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:50,435 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-11-22 01:25:50,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-11-22 01:25:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:25:50,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:50,436 INFO L195 NwaCegarLoop]: trace histogram [22, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:50,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:50,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:50,650 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:25:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash -495149787, now seen corresponding path program 5 times [2022-11-22 01:25:50,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:50,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23570844] [2022-11-22 01:25:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:25:51,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:51,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23570844] [2022-11-22 01:25:51,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23570844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:51,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751758118] [2022-11-22 01:25:51,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:25:51,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:51,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:51,265 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:51,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:25:51,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 01:25:51,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:25:51,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:25:51,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-22 01:25:51,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-22 01:25:51,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751758118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:51,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682170202] [2022-11-22 01:25:51,613 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:25:51,613 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:51,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:51,614 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:51,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:51,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:51,636 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:25:51,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:25:51,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:51,661 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:51,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:25:51,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:51,682 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 [2022-11-22 01:25:51,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:51,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:51,739 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:25:51,740 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 [2022-11-22 01:25:51,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:25:51,790 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 [2022-11-22 01:25:51,824 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:52,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1444#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:25:52,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:52,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:25:52,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 33 [2022-11-22 01:25:52,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240180656] [2022-11-22 01:25:52,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:52,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-22 01:25:52,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:52,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-22 01:25:52,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:25:52,046 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:52,884 INFO L93 Difference]: Finished difference Result 152 states and 181 transitions. [2022-11-22 01:25:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-22 01:25:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-22 01:25:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:52,886 INFO L225 Difference]: With dead ends: 152 [2022-11-22 01:25:52,886 INFO L226 Difference]: Without dead ends: 90 [2022-11-22 01:25:52,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1159, Invalid=2623, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 01:25:52,889 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 196 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:52,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 40 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:25:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-22 01:25:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-22 01:25:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-11-22 01:25:52,914 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 37 [2022-11-22 01:25:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:52,914 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-11-22 01:25:52,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-11-22 01:25:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-22 01:25:52,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:52,917 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 26, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:52,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:53,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 01:25:53,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:25:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash 216908909, now seen corresponding path program 6 times [2022-11-22 01:25:53,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:53,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388634606] [2022-11-22 01:25:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:53,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:25:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-22 01:25:54,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:54,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388634606] [2022-11-22 01:25:54,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388634606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:25:54,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091254224] [2022-11-22 01:25:54,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:25:54,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:54,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:25:54,078 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:25:54,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:25:54,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:25:54,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:25:54,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 01:25:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:25:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-22 01:25:54,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-22 01:25:55,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091254224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:55,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [950204704] [2022-11-22 01:25:55,378 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:25:55,379 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:55,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:55,379 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:55,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:55,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:55,411 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:25:55,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:25:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:55,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:25:55,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:55,445 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 [2022-11-22 01:25:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:55,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:55,502 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:25:55,503 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 [2022-11-22 01:25:55,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:25:55,546 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 [2022-11-22 01:25:55,627 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:25:56,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2441#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:25:56,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:25:56,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:25:56,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2022-11-22 01:25:56,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356028093] [2022-11-22 01:25:56,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:25:56,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-22 01:25:56,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:25:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-22 01:25:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1613, Invalid=2169, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 01:25:56,741 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:25:57,328 INFO L93 Difference]: Finished difference Result 336 states and 365 transitions. [2022-11-22 01:25:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-22 01:25:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-22 01:25:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:25:57,330 INFO L225 Difference]: With dead ends: 336 [2022-11-22 01:25:57,330 INFO L226 Difference]: Without dead ends: 274 [2022-11-22 01:25:57,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 204 SyntacticMatches, 29 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2887 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1613, Invalid=2169, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 01:25:57,333 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 430 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:25:57,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 99 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:25:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-22 01:25:57,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 118. [2022-11-22 01:25:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-11-22 01:25:57,363 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 89 [2022-11-22 01:25:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:25:57,364 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-11-22 01:25:57,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:25:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-11-22 01:25:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 01:25:57,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:25:57,366 INFO L195 NwaCegarLoop]: trace histogram [54, 29, 28, 1, 1, 1, 1, 1, 1] [2022-11-22 01:25:57,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:25:57,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:25:57,572 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:25:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:25:57,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1998833773, now seen corresponding path program 7 times [2022-11-22 01:25:57,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:25:57,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907817759] [2022-11-22 01:25:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:25:57,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:25:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-22 01:26:00,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:26:00,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907817759] [2022-11-22 01:26:00,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907817759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:26:00,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357219590] [2022-11-22 01:26:00,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:26:00,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:26:00,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:26:00,970 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:26:00,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:26:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:01,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-22 01:26:01,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:26:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-22 01:26:01,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:26:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-22 01:26:05,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357219590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:26:05,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [791710750] [2022-11-22 01:26:05,464 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:26:05,465 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:26:05,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:26:05,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:26:05,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:26:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:26:05,498 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:26:05,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:26:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:26:05,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:26:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:26:05,542 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 [2022-11-22 01:26:05,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:26:05,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:26:05,622 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:26:05,623 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 [2022-11-22 01:26:05,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:26:05,690 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 [2022-11-22 01:26:05,752 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:26:07,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3932#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:26:07,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:26:07,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:26:07,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 112 [2022-11-22 01:26:07,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881293683] [2022-11-22 01:26:07,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:26:07,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-22 01:26:07,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:26:07,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-22 01:26:07,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6345, Invalid=7461, Unknown=0, NotChecked=0, Total=13806 [2022-11-22 01:26:07,535 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 113 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 112 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:26:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:26:10,514 INFO L93 Difference]: Finished difference Result 728 states and 785 transitions. [2022-11-22 01:26:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-22 01:26:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 112 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-22 01:26:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:26:10,519 INFO L225 Difference]: With dead ends: 728 [2022-11-22 01:26:10,520 INFO L226 Difference]: Without dead ends: 666 [2022-11-22 01:26:10,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 260 SyntacticMatches, 29 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5855 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=6345, Invalid=7461, Unknown=0, NotChecked=0, Total=13806 [2022-11-22 01:26:10,524 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1731 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:26:10,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1731 Valid, 264 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:26:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-22 01:26:10,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 174. [2022-11-22 01:26:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:26:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2022-11-22 01:26:10,564 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 117 [2022-11-22 01:26:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:26:10,564 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2022-11-22 01:26:10,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 112 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:26:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2022-11-22 01:26:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-22 01:26:10,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:26:10,568 INFO L195 NwaCegarLoop]: trace histogram [110, 29, 28, 1, 1, 1, 1, 1, 1] [2022-11-22 01:26:10,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:26:10,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:26:10,775 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:26:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:26:10,775 INFO L85 PathProgramCache]: Analyzing trace with hash -196751251, now seen corresponding path program 8 times [2022-11-22 01:26:10,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:26:10,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936660242] [2022-11-22 01:26:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:26:10,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:26:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:26:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6917 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-22 01:26:20,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:26:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936660242] [2022-11-22 01:26:20,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936660242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:26:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561034478] [2022-11-22 01:26:20,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:26:20,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:26:20,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:26:20,279 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:26:20,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:30:14,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2022-11-22 01:30:14,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:30:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 01:30:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6917 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2022-11-22 01:30:15,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6917 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2022-11-22 01:30:18,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561034478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:18,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258349015] [2022-11-22 01:30:18,328 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:30:18,328 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:30:18,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:30:18,329 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:30:18,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:30:18,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:18,349 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:30:18,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:30:18,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:18,370 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:30:18,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:30:18,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:18,389 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 [2022-11-22 01:30:18,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:18,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:30:18,469 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:30:18,469 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 [2022-11-22 01:30:18,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:30:18,558 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 [2022-11-22 01:30:18,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:30:19,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6407#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:30:19,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:30:19,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:30:19,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 32, 32] total 145 [2022-11-22 01:30:19,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032833899] [2022-11-22 01:30:19,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:30:19,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-22 01:30:19,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-22 01:30:19,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10175, Invalid=12175, Unknown=0, NotChecked=0, Total=22350 [2022-11-22 01:30:19,074 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 145 states, 145 states have (on average 1.6689655172413793) internal successors, (242), 145 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:31,126 INFO L93 Difference]: Finished difference Result 712 states and 853 transitions. [2022-11-22 01:30:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-11-22 01:30:31,127 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.6689655172413793) internal successors, (242), 145 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-11-22 01:30:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:31,130 INFO L225 Difference]: With dead ends: 712 [2022-11-22 01:30:31,130 INFO L226 Difference]: Without dead ends: 426 [2022-11-22 01:30:31,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8422 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=23167, Invalid=45215, Unknown=0, NotChecked=0, Total=68382 [2022-11-22 01:30:31,138 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1421 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:31,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1421 Valid, 132 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:30:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-22 01:30:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2022-11-22 01:30:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.0047058823529411) internal successors, (427), 425 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 427 transitions. [2022-11-22 01:30:31,393 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 427 transitions. Word has length 173 [2022-11-22 01:30:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:31,394 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 427 transitions. [2022-11-22 01:30:31,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.6689655172413793) internal successors, (242), 145 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 427 transitions. [2022-11-22 01:30:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-11-22 01:30:31,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:31,408 INFO L195 NwaCegarLoop]: trace histogram [141, 140, 138, 1, 1, 1, 1, 1, 1] [2022-11-22 01:30:31,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:31,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:31,635 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:31,635 INFO L85 PathProgramCache]: Analyzing trace with hash 841606077, now seen corresponding path program 9 times [2022-11-22 01:30:31,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:31,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023280714] [2022-11-22 01:30:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:31,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 29331 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-22 01:30:46,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:46,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023280714] [2022-11-22 01:30:46,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023280714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:30:46,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853959713] [2022-11-22 01:30:46,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:30:46,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:46,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:46,689 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:46,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:30:47,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:30:47,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:30:47,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1995 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-22 01:30:47,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 29331 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-22 01:30:47,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:31:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 29331 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-22 01:31:11,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853959713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:31:11,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809980374] [2022-11-22 01:31:11,121 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:31:11,121 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:31:11,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:31:11,122 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:31:11,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:31:11,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:11,144 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:31:11,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-22 01:31:11,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:11,166 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:31:11,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:31:11,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:11,182 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 [2022-11-22 01:31:11,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:31:11,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:31:11,241 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-22 01:31:11,241 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 [2022-11-22 01:31:11,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:31:11,308 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 [2022-11-22 01:31:11,362 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:31:25,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11188#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:31:25,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:31:25,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:31:25,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140, 140] total 280 [2022-11-22 01:31:25,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514901333] [2022-11-22 01:31:25,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:31:25,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 281 states [2022-11-22 01:31:25,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:31:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 281 interpolants. [2022-11-22 01:31:25,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39357, Invalid=42153, Unknown=0, NotChecked=0, Total=81510 [2022-11-22 01:31:25,851 INFO L87 Difference]: Start difference. First operand 426 states and 427 transitions. Second operand has 281 states, 281 states have (on average 1.0249110320284698) internal successors, (288), 280 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:15,483 INFO L93 Difference]: Finished difference Result 1680 states and 1821 transitions. [2022-11-22 01:32:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2022-11-22 01:32:15,484 INFO L78 Accepts]: Start accepts. Automaton has has 281 states, 281 states have (on average 1.0249110320284698) internal successors, (288), 280 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 425 [2022-11-22 01:32:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:15,490 INFO L225 Difference]: With dead ends: 1680 [2022-11-22 01:32:15,490 INFO L226 Difference]: Without dead ends: 1394 [2022-11-22 01:32:15,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1413 GetRequests, 988 SyntacticMatches, 141 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61575 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=39357, Invalid=42153, Unknown=0, NotChecked=0, Total=81510 [2022-11-22 01:32:15,495 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3392 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 1289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3392 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1289 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:15,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3392 Valid, 429 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1289 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-22 01:32:15,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-11-22 01:32:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 566. [2022-11-22 01:32:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.0035398230088495) internal successors, (567), 565 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 567 transitions. [2022-11-22 01:32:15,889 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 567 transitions. Word has length 425 [2022-11-22 01:32:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:15,890 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 567 transitions. [2022-11-22 01:32:15,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 281 states, 281 states have (on average 1.0249110320284698) internal successors, (288), 280 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 567 transitions. [2022-11-22 01:32:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-11-22 01:32:15,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:15,908 INFO L195 NwaCegarLoop]: trace histogram [278, 141, 140, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:15,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:32:16,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 01:32:16,126 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:32:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:16,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1524369475, now seen corresponding path program 10 times [2022-11-22 01:32:16,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:32:16,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733406655] [2022-11-22 01:32:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:32:16,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:32:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 58521 backedges. 0 proven. 38781 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-22 01:33:14,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:33:14,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733406655] [2022-11-22 01:33:14,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733406655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:33:14,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387557769] [2022-11-22 01:33:14,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:33:14,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:14,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:14,815 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:14,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da7b581-6d73-40cc-b164-5bc2ad70b209/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:33:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:33:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 3255 conjuncts, 280 conjunts are in the unsatisfiable core [2022-11-22 01:33:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 58521 backedges. 0 proven. 38781 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-22 01:33:16,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:34:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 58521 backedges. 0 proven. 38781 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2022-11-22 01:34:49,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387557769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:34:49,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454287729] [2022-11-22 01:34:49,955 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 01:34:49,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:34:49,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:34:49,956 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:34:49,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:34:49,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:49,987 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 01:34:49,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-22 01:34:49,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:49,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 01:34:50,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:50,014 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 [2022-11-22 01:34:50,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:50,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:34:50,070 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-22 01:34:50,071 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 [2022-11-22 01:34:50,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:34:50,118 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 [2022-11-22 01:34:50,146 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:34:51,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18503#(and (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_~i~0#1| 1024) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:34:51,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:34:51,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:34:51,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [280, 280, 280] total 560 [2022-11-22 01:34:51,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393044785] [2022-11-22 01:34:51,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:34:51,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 561 states [2022-11-22 01:34:51,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:34:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 561 interpolants. [2022-11-22 01:34:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157097, Invalid=162693, Unknown=0, NotChecked=0, Total=319790 [2022-11-22 01:34:51,183 INFO L87 Difference]: Start difference. First operand 566 states and 567 transitions. Second operand has 561 states, 561 states have (on average 1.0124777183600713) internal successors, (568), 560 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)