./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bor1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bor1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW --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 dc029b09d1398b404e1aee83359480f2bc7a4040f694547fb82d365d81b9786a --- 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-4e7fbc6 [2022-11-23 14:42:07,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:42:07,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:42:07,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:42:07,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:42:07,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:42:07,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:42:07,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:42:07,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:42:07,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:42:07,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:42:07,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:42:07,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:42:07,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:42:07,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:42:07,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:42:07,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:42:07,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:42:07,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:42:07,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:42:07,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:42:07,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:42:07,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:42:07,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:42:07,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:42:07,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:42:07,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:42:07,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:42:07,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:42:07,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:42:07,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:42:07,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:42:07,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:42:07,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:42:07,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:42:07,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:42:07,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:42:07,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:42:07,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:42:07,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:42:07,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:42:07,741 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:42:07,795 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:42:07,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:42:07,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:42:07,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:42:07,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:42:07,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:42:07,798 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:42:07,798 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:42:07,798 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:42:07,799 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:42:07,799 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:42:07,799 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:42:07,800 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:42:07,800 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:42:07,800 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:42:07,801 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:42:07,801 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:42:07,801 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:42:07,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:42:07,803 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:42:07,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:42:07,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:42:07,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:42:07,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:42:07,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:42:07,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:42:07,805 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:42:07,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:42:07,806 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:42:07,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:42:07,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:42:07,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:42:07,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:42:07,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:42:07,808 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:42:07,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:42:07,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:42:07,809 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:42:07,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:42:07,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:42:07,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:42:07,810 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_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc029b09d1398b404e1aee83359480f2bc7a4040f694547fb82d365d81b9786a [2022-11-23 14:42:08,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:42:08,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:42:08,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:42:08,189 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:42:08,191 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:42:08,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-crafted/bor1.i [2022-11-23 14:42:11,805 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:42:12,057 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:42:12,058 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/sv-benchmarks/c/array-crafted/bor1.i [2022-11-23 14:42:12,064 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/data/5d33221b9/e00468f8322a4834b4f50cd2e1450bbe/FLAGd6a524a94 [2022-11-23 14:42:12,082 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/data/5d33221b9/e00468f8322a4834b4f50cd2e1450bbe [2022-11-23 14:42:12,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:42:12,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:42:12,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:42:12,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:42:12,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:42:12,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c361a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12, skipping insertion in model container [2022-11-23 14:42:12,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:42:12,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:42:12,349 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_562918ed-f125-459b-bd0d-235e7c687eb4/sv-benchmarks/c/array-crafted/bor1.i[1285,1298] [2022-11-23 14:42:12,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:42:12,364 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:42:12,389 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_562918ed-f125-459b-bd0d-235e7c687eb4/sv-benchmarks/c/array-crafted/bor1.i[1285,1298] [2022-11-23 14:42:12,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:42:12,404 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:42:12,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12 WrapperNode [2022-11-23 14:42:12,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:42:12,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:42:12,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:42:12,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:42:12,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,445 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-11-23 14:42:12,445 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:42:12,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:42:12,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:42:12,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:42:12,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,488 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:42:12,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:42:12,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:42:12,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:42:12,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (1/1) ... [2022-11-23 14:42:12,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:42:12,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:12,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:42:12,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:42:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:42:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-11-23 14:42:12,600 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-11-23 14:42:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:42:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:42:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:42:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:42:12,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:42:12,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:42:12,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:42:12,691 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:42:12,693 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:42:12,917 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:42:13,123 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:42:13,123 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 14:42:13,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:13 BoogieIcfgContainer [2022-11-23 14:42:13,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:42:13,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:42:13,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:42:13,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:42:13,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:42:12" (1/3) ... [2022-11-23 14:42:13,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14219a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:13, skipping insertion in model container [2022-11-23 14:42:13,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:12" (2/3) ... [2022-11-23 14:42:13,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14219a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:13, skipping insertion in model container [2022-11-23 14:42:13,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:13" (3/3) ... [2022-11-23 14:42:13,155 INFO L112 eAbstractionObserver]: Analyzing ICFG bor1.i [2022-11-23 14:42:13,192 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:42:13,193 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:42:13,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:42:13,352 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;@8ea40fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:42:13,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:42:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:42:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:42:13,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:13,378 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:13,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:13,390 INFO L85 PathProgramCache]: Analyzing trace with hash 100807982, now seen corresponding path program 1 times [2022-11-23 14:42:13,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:13,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620742785] [2022-11-23 14:42:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:13,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:42:13,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:13,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620742785] [2022-11-23 14:42:13,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620742785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:13,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:13,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:42:13,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486546014] [2022-11-23 14:42:13,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:13,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:13,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:13,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:13,927 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:42:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:13,989 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-23 14:42:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-23 14:42:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:14,000 INFO L225 Difference]: With dead ends: 33 [2022-11-23 14:42:14,000 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 14:42:14,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:14,021 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:14,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 14:42:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 14:42:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:42:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-23 14:42:14,066 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-23 14:42:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:14,067 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-23 14:42:14,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:42:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-23 14:42:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 14:42:14,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:14,070 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:14,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:42:14,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:14,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash -757343262, now seen corresponding path program 1 times [2022-11-23 14:42:14,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:14,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073244997] [2022-11-23 14:42:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:14,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:42:14,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:14,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073244997] [2022-11-23 14:42:14,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073244997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:14,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252112401] [2022-11-23 14:42:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:14,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:14,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:14,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:14,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:42:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:42:14,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:42:14,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:14,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252112401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:14,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:14,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 14:42:14,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614416921] [2022-11-23 14:42:14,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:14,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:14,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:14,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:14,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:14,543 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:42:14,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:14,579 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-23 14:42:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-23 14:42:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:14,584 INFO L225 Difference]: With dead ends: 29 [2022-11-23 14:42:14,584 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 14:42:14,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:14,587 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:14,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 14:42:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 14:42:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:42:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-23 14:42:14,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-23 14:42:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:14,596 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-23 14:42:14,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:42:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-23 14:42:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 14:42:14,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:14,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:14,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:14,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:14,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:14,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:14,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1111287051, now seen corresponding path program 1 times [2022-11-23 14:42:14,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:14,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673240414] [2022-11-23 14:42:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:14,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:42:15,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:15,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673240414] [2022-11-23 14:42:15,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673240414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:15,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285820044] [2022-11-23 14:42:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:15,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:15,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:15,065 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:15,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:42:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:15,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:42:15,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:42:15,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:15,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285820044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:15,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:15,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 14:42:15,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474965571] [2022-11-23 14:42:15,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:15,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:15,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:15,217 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:42:15,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:15,241 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-23 14:42:15,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:15,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-23 14:42:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:15,243 INFO L225 Difference]: With dead ends: 27 [2022-11-23 14:42:15,244 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 14:42:15,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:15,246 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:15,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 14:42:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 14:42:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:42:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-23 14:42:15,253 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-23 14:42:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:15,258 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-23 14:42:15,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:42:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-23 14:42:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:42:15,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:15,260 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:15,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:15,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:15,462 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:15,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:15,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1287279236, now seen corresponding path program 1 times [2022-11-23 14:42:15,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:15,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474201552] [2022-11-23 14:42:15,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:15,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:42:15,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474201552] [2022-11-23 14:42:15,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474201552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481617237] [2022-11-23 14:42:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:15,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:15,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:15,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:15,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:42:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:15,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:42:15,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:42:15,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:42:15,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481617237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [813339754] [2022-11-23 14:42:15,944 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:42:15,944 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:15,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:15,957 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:15,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:16,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:16,122 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:16,123 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 [2022-11-23 14:42:16,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:16,156 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 [2022-11-23 14:42:16,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:16,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-23 14:42:16,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:16,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:16,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:16,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:16,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:42:16,548 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-23 14:42:16,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-23 14:42:16,815 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 [2022-11-23 14:42:17,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:17,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:42:17,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:17,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-23 14:42:17,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:17,376 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-23 14:42:17,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-23 14:42:17,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:42:17,465 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 [2022-11-23 14:42:17,635 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:42:17,766 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:21,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-11-23 14:42:21,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:21,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:21,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-23 14:42:21,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550178604] [2022-11-23 14:42:21,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:21,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:42:21,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:21,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:42:21,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:42:21,144 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 14:42:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:21,199 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-23 14:42:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:42:21,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-11-23 14:42:21,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:21,202 INFO L225 Difference]: With dead ends: 36 [2022-11-23 14:42:21,202 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 14:42:21,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:42:21,206 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:21,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:21,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 14:42:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-23 14:42:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:42:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-23 14:42:21,220 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-23 14:42:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:21,221 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-23 14:42:21,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 14:42:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-23 14:42:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 14:42:21,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:21,225 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:21,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:21,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:21,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash -897184312, now seen corresponding path program 2 times [2022-11-23 14:42:21,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:21,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32251852] [2022-11-23 14:42:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:21,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:42:21,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:21,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32251852] [2022-11-23 14:42:21,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32251852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:21,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941745474] [2022-11-23 14:42:21,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:42:21,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:21,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:21,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:42:21,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:42:21,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:42:21,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:42:21,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:42:21,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:42:21,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941745474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:21,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1980957322] [2022-11-23 14:42:21,785 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:42:21,786 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:21,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:21,787 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:21,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:21,837 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:42:21,837 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 [2022-11-23 14:42:21,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:21,881 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:21,881 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 [2022-11-23 14:42:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:21,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-23 14:42:22,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,101 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-23 14:42:22,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-23 14:42:22,168 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 [2022-11-23 14:42:22,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:42:22,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:42:22,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:42:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:22,490 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:42:22,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:42:22,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:42:22,536 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 [2022-11-23 14:42:22,701 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:42:22,814 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:28,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:28,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:28,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:28,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:42:28,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705908575] [2022-11-23 14:42:28,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:28,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:42:28,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:28,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:42:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-11-23 14:42:28,094 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:42:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:28,149 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-23 14:42:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:42:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-11-23 14:42:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:28,151 INFO L225 Difference]: With dead ends: 38 [2022-11-23 14:42:28,152 INFO L226 Difference]: Without dead ends: 24 [2022-11-23 14:42:28,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-11-23 14:42:28,153 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:28,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-23 14:42:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-23 14:42:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:42:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-23 14:42:28,160 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-23 14:42:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:28,160 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-23 14:42:28,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:42:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-23 14:42:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:42:28,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:28,163 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:28,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:28,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:28,370 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:28,370 INFO L85 PathProgramCache]: Analyzing trace with hash -776270593, now seen corresponding path program 3 times [2022-11-23 14:42:28,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:28,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453427609] [2022-11-23 14:42:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:28,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-23 14:42:28,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453427609] [2022-11-23 14:42:28,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453427609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:28,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795154885] [2022-11-23 14:42:28,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:42:28,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:28,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:28,569 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:28,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:42:28,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:42:28,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:42:28,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:42:28,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-23 14:42:28,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-23 14:42:28,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795154885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:28,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019781547] [2022-11-23 14:42:28,882 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:42:28,882 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:28,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:28,883 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:28,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:28,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:28,922 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:42:28,922 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 [2022-11-23 14:42:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:28,961 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:28,962 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 [2022-11-23 14:42:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:28,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-23 14:42:29,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:29,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:29,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:29,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:29,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:42:29,152 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-23 14:42:29,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-23 14:42:29,283 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 [2022-11-23 14:42:29,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:29,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:42:29,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:29,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:42:29,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:42:29,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:29,614 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:42:29,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:42:29,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:42:29,658 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 [2022-11-23 14:42:29,791 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:42:29,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:33,208 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:33,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:33,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:33,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-11-23 14:42:33,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321105055] [2022-11-23 14:42:33,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:33,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 14:42:33,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 14:42:33,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:42:33,211 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:42:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:33,294 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-23 14:42:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:42:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-11-23 14:42:33,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:33,297 INFO L225 Difference]: With dead ends: 49 [2022-11-23 14:42:33,297 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 14:42:33,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:42:33,299 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:33,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 14:42:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 14:42:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:42:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-23 14:42:33,306 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-23 14:42:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:33,307 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-23 14:42:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:42:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-23 14:42:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 14:42:33,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:33,309 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:33,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 14:42:33,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:42:33,515 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:33,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:33,516 INFO L85 PathProgramCache]: Analyzing trace with hash -896043506, now seen corresponding path program 4 times [2022-11-23 14:42:33,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:33,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885894108] [2022-11-23 14:42:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:33,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-23 14:42:33,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:33,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885894108] [2022-11-23 14:42:33,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885894108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:33,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203513062] [2022-11-23 14:42:33,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:42:33,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:33,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:33,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:33,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:42:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:34,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:42:34,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-23 14:42:34,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-23 14:42:34,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203513062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:34,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026201445] [2022-11-23 14:42:34,491 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:42:34,491 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:34,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:34,492 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:34,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:34,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,569 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:34,569 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 [2022-11-23 14:42:34,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,586 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 [2022-11-23 14:42:34,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-23 14:42:34,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:34,828 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-23 14:42:34,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-23 14:42:34,888 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 [2022-11-23 14:42:35,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:35,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:42:35,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:35,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:42:35,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:42:35,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:35,187 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:42:35,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:42:35,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:42:35,239 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 [2022-11-23 14:42:35,377 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:42:35,480 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:38,871 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:38,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:38,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:38,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-11-23 14:42:38,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005492639] [2022-11-23 14:42:38,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:38,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:42:38,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:42:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 14:42:38,875 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 14:42:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:38,978 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-11-23 14:42:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:42:38,979 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-23 14:42:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:38,980 INFO L225 Difference]: With dead ends: 62 [2022-11-23 14:42:38,981 INFO L226 Difference]: Without dead ends: 43 [2022-11-23 14:42:38,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 14:42:38,983 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:38,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:38,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-23 14:42:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-23 14:42:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:42:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-23 14:42:38,992 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2022-11-23 14:42:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:38,992 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-23 14:42:38,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 14:42:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-23 14:42:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 14:42:38,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:38,995 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:39,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:39,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:39,199 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:39,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:39,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1269752562, now seen corresponding path program 5 times [2022-11-23 14:42:39,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:39,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676051696] [2022-11-23 14:42:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:39,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-23 14:42:40,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:40,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676051696] [2022-11-23 14:42:40,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676051696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:40,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503280886] [2022-11-23 14:42:40,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:42:40,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:40,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:40,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:40,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:42:40,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:42:40,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:42:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:42:40,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-23 14:42:40,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-23 14:42:40,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503280886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:40,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972274421] [2022-11-23 14:42:40,752 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:42:40,752 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:40,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:40,753 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:40,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:40,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,788 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:42:40,789 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 [2022-11-23 14:42:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,822 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:40,823 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 [2022-11-23 14:42:40,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-23 14:42:40,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:40,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:41,024 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-23 14:42:41,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-23 14:42:41,087 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 [2022-11-23 14:42:41,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:41,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:42:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:41,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-23 14:42:41,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:41,431 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-23 14:42:41,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-23 14:42:41,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:42:41,503 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 [2022-11-23 14:42:41,632 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:42:41,773 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:45,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_29 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_29 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_29 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_29 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:45,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:45,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:45,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2022-11-23 14:42:45,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362987375] [2022-11-23 14:42:45,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:45,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:42:45,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:42:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:42:45,370 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:42:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:45,509 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-11-23 14:42:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 14:42:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-11-23 14:42:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:45,511 INFO L225 Difference]: With dead ends: 69 [2022-11-23 14:42:45,512 INFO L226 Difference]: Without dead ends: 50 [2022-11-23 14:42:45,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:42:45,514 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:45,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:45,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-23 14:42:45,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-23 14:42:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:42:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-23 14:42:45,522 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2022-11-23 14:42:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:45,523 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-23 14:42:45,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:42:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-23 14:42:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 14:42:45,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:45,524 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:45,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:45,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:45,732 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash -210336222, now seen corresponding path program 6 times [2022-11-23 14:42:45,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:45,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019498529] [2022-11-23 14:42:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:45,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-23 14:42:47,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:47,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019498529] [2022-11-23 14:42:47,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019498529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:47,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489374384] [2022-11-23 14:42:47,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:42:47,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:47,095 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:47,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:42:47,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:42:47,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:42:47,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:42:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-23 14:42:47,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-23 14:42:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489374384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052086678] [2022-11-23 14:42:48,558 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:42:48,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:48,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:48,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:48,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:48,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,604 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:42:48,604 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 [2022-11-23 14:42:48,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,619 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 [2022-11-23 14:42:48,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-23 14:42:48,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,803 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-23 14:42:48,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-23 14:42:48,860 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 [2022-11-23 14:42:48,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:48,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:42:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:49,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-23 14:42:49,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:49,148 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-23 14:42:49,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-23 14:42:49,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:42:49,209 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 [2022-11-23 14:42:49,344 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:42:49,421 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:52,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:52,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:52,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:52,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-11-23 14:42:52,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412223452] [2022-11-23 14:42:52,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:52,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 14:42:52,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:52,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 14:42:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-23 14:42:52,881 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 14:42:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:53,068 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2022-11-23 14:42:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 14:42:53,069 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-11-23 14:42:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:53,074 INFO L225 Difference]: With dead ends: 100 [2022-11-23 14:42:53,074 INFO L226 Difference]: Without dead ends: 75 [2022-11-23 14:42:53,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-23 14:42:53,079 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:53,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-23 14:42:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-23 14:42:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:42:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-23 14:42:53,109 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2022-11-23 14:42:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:53,112 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-23 14:42:53,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 14:42:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-23 14:42:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-23 14:42:53,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:53,117 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:53,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:53,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:53,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1390752494, now seen corresponding path program 7 times [2022-11-23 14:42:53,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:53,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871512056] [2022-11-23 14:42:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:53,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-23 14:42:57,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:57,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871512056] [2022-11-23 14:42:57,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871512056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:57,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826572705] [2022-11-23 14:42:57,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:42:57,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:57,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:57,104 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:57,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:42:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:57,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 14:42:57,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-23 14:42:57,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-23 14:43:01,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826572705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:01,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [274889902] [2022-11-23 14:43:01,612 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:43:01,613 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:01,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:01,613 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:01,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:01,656 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:01,656 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 [2022-11-23 14:43:01,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:01,672 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 [2022-11-23 14:43:01,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:01,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-23 14:43:01,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:01,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:01,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:01,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:01,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:01,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:01,833 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-23 14:43:01,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-23 14:43:01,959 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 [2022-11-23 14:43:02,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:02,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:43:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:02,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:02,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:43:02,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:02,235 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:43:02,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:43:02,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:43:02,302 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 [2022-11-23 14:43:02,423 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:43:02,515 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:43:10,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_41 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_41 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_41 4294967296) (+ (- 4294967296) (mod v_bor_~res~0_BEFORE_RETURN_41 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:43:10,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:43:10,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:43:10,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2022-11-23 14:43:10,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049936645] [2022-11-23 14:43:10,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:43:10,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 14:43:10,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:10,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 14:43:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-23 14:43:10,334 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 14:43:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:10,634 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2022-11-23 14:43:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 14:43:10,637 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2022-11-23 14:43:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:10,639 INFO L225 Difference]: With dead ends: 150 [2022-11-23 14:43:10,640 INFO L226 Difference]: Without dead ends: 125 [2022-11-23 14:43:10,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-23 14:43:10,649 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:10,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:43:10,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-23 14:43:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-23 14:43:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:43:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-11-23 14:43:10,684 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2022-11-23 14:43:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:10,685 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-11-23 14:43:10,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 14:43:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-11-23 14:43:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-23 14:43:10,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:10,694 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:10,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:10,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:43:10,902 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:10,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1157257874, now seen corresponding path program 8 times [2022-11-23 14:43:10,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:10,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689881237] [2022-11-23 14:43:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-23 14:43:20,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:20,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689881237] [2022-11-23 14:43:20,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689881237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:43:20,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594129860] [2022-11-23 14:43:20,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:43:20,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:20,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:20,185 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:20,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:43:20,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:43:20,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:43:20,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:43:20,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2022-11-23 14:43:20,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2022-11-23 14:43:20,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594129860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:20,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [807331164] [2022-11-23 14:43:20,922 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:43:20,922 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:20,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:20,923 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:20,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:20,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:20,965 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:43:20,965 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 [2022-11-23 14:43:20,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,001 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:21,001 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 [2022-11-23 14:43:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-23 14:43:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,188 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-23 14:43:21,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-23 14:43:21,244 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 [2022-11-23 14:43:21,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:43:21,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:21,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:43:21,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:21,497 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:43:21,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:43:21,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:43:21,538 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 13 treesize of output 9 [2022-11-23 14:43:21,652 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:43:21,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:43:28,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-11-23 14:43:28,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:43:28,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:43:28,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2022-11-23 14:43:28,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323908454] [2022-11-23 14:43:28,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:43:28,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-23 14:43:28,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:28,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-23 14:43:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5136, Invalid=9143, Unknown=1, NotChecked=0, Total=14280 [2022-11-23 14:43:28,599 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:43:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:28,847 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-11-23 14:43:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-23 14:43:28,848 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-11-23 14:43:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:28,854 INFO L225 Difference]: With dead ends: 155 [2022-11-23 14:43:28,854 INFO L226 Difference]: Without dead ends: 130 [2022-11-23 14:43:28,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=5136, Invalid=9143, Unknown=1, NotChecked=0, Total=14280 [2022-11-23 14:43:28,860 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:28,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:43:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-23 14:43:28,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-23 14:43:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:43:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-11-23 14:43:28,876 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2022-11-23 14:43:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:28,877 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-11-23 14:43:28,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:43:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-11-23 14:43:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-23 14:43:28,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:28,880 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:28,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:29,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:43:29,087 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1881747810, now seen corresponding path program 9 times [2022-11-23 14:43:29,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:29,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534580382] [2022-11-23 14:43:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:29,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-23 14:43:38,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:38,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534580382] [2022-11-23 14:43:38,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534580382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:43:38,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664013634] [2022-11-23 14:43:38,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:43:38,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:38,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:38,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:38,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:43:38,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:43:38,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:43:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 14:43:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-23 14:43:39,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-23 14:43:45,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664013634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:45,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790728854] [2022-11-23 14:43:45,192 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:43:45,192 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:45,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:45,193 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:45,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:45,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,236 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:45,237 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 [2022-11-23 14:43:45,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,255 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 [2022-11-23 14:43:45,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-23 14:43:45,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,416 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-23 14:43:45,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-23 14:43:45,479 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 [2022-11-23 14:43:45,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:43:45,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:45,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:43:45,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,753 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:43:45,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:43:45,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:43:45,798 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 [2022-11-23 14:43:45,919 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:43:45,997 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:43:54,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7025#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (exists ((v_bor_~res~0_BEFORE_RETURN_54 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) (- 4294967296))))) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:43:54,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:43:54,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:43:54,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 103 [2022-11-23 14:43:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433740908] [2022-11-23 14:43:54,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:43:54,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-23 14:43:54,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:54,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-23 14:43:54,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5313, Invalid=8027, Unknown=0, NotChecked=0, Total=13340 [2022-11-23 14:43:54,575 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 14:43:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:54,795 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-11-23 14:43:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-23 14:43:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 155 [2022-11-23 14:43:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:54,797 INFO L225 Difference]: With dead ends: 160 [2022-11-23 14:43:54,797 INFO L226 Difference]: Without dead ends: 131 [2022-11-23 14:43:54,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 100 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6788 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=5313, Invalid=8027, Unknown=0, NotChecked=0, Total=13340 [2022-11-23 14:43:54,800 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:54,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:43:54,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-23 14:43:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-23 14:43:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:43:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-11-23 14:43:54,834 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 155 [2022-11-23 14:43:54,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:54,834 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-11-23 14:43:54,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 14:43:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-11-23 14:43:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 14:43:54,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:54,838 INFO L195 NwaCegarLoop]: trace histogram [100, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:54,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:55,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:43:55,047 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:55,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:55,048 INFO L85 PathProgramCache]: Analyzing trace with hash -563898322, now seen corresponding path program 10 times [2022-11-23 14:43:55,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:55,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659183635] [2022-11-23 14:43:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:55,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-23 14:43:55,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:55,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659183635] [2022-11-23 14:43:55,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659183635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:43:55,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611107005] [2022-11-23 14:43:55,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:43:55,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:55,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:55,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:55,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:43:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:56,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:43:56,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-23 14:43:56,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-11-23 14:43:56,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611107005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:56,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381356247] [2022-11-23 14:43:56,715 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:43:56,715 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:56,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:56,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:56,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:56,752 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:43:56,753 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 [2022-11-23 14:43:56,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:56,792 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:56,793 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 [2022-11-23 14:43:56,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:56,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-23 14:43:56,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:56,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:56,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:56,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:56,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:56,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:56,963 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-23 14:43:56,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-23 14:43:57,071 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 [2022-11-23 14:43:57,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:57,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:43:57,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:57,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:57,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:43:57,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:57,302 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:43:57,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:43:57,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:43:57,340 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 [2022-11-23 14:43:57,452 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:43:57,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:02,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8552#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:44:02,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:02,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:02,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-23 14:44:02,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369585121] [2022-11-23 14:44:02,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:02,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:44:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:44:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 14:44:02,781 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:44:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:02,865 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2022-11-23 14:44:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:44:02,866 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2022-11-23 14:44:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:02,867 INFO L225 Difference]: With dead ends: 171 [2022-11-23 14:44:02,867 INFO L226 Difference]: Without dead ends: 143 [2022-11-23 14:44:02,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 14:44:02,869 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:02,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:44:02,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-23 14:44:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-23 14:44:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:44:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-11-23 14:44:02,882 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 156 [2022-11-23 14:44:02,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:02,883 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-11-23 14:44:02,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:44:02,883 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-11-23 14:44:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-23 14:44:02,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:02,887 INFO L195 NwaCegarLoop]: trace histogram [100, 66, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:02,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:44:03,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:03,107 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:44:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash 874271470, now seen corresponding path program 11 times [2022-11-23 14:44:03,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:03,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235244531] [2022-11-23 14:44:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:03,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 6110 trivial. 0 not checked. [2022-11-23 14:44:04,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:04,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235244531] [2022-11-23 14:44:04,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235244531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:04,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198089379] [2022-11-23 14:44:04,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:44:04,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:04,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:04,794 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:04,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:44:05,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 14:44:05,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:44:05,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:44:05,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 1062 proven. 21 refuted. 0 times theorem prover too weak. 6340 trivial. 0 not checked. [2022-11-23 14:44:05,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7402 trivial. 0 not checked. [2022-11-23 14:44:05,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198089379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:44:05,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935935953] [2022-11-23 14:44:05,772 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:44:05,772 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:44:05,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:44:05,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:44:05,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:44:05,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:05,818 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:44:05,818 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 [2022-11-23 14:44:05,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:05,837 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 [2022-11-23 14:44:05,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:05,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-23 14:44:05,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:05,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:05,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:05,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:05,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:05,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:44:06,055 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-23 14:44:06,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-23 14:44:06,187 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 [2022-11-23 14:44:06,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:06,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:44:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:06,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:44:06,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:44:06,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:06,488 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:44:06,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:44:06,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:44:06,531 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 [2022-11-23 14:44:06,644 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:44:06,737 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:14,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10355#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-11-23 14:44:14,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:14,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:14,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-11-23 14:44:14,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860752083] [2022-11-23 14:44:14,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:14,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 14:44:14,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:14,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 14:44:14,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=2173, Unknown=1, NotChecked=0, Total=2652 [2022-11-23 14:44:14,332 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:44:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:14,440 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2022-11-23 14:44:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 14:44:14,441 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 192 [2022-11-23 14:44:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:14,442 INFO L225 Difference]: With dead ends: 192 [2022-11-23 14:44:14,442 INFO L226 Difference]: Without dead ends: 152 [2022-11-23 14:44:14,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=478, Invalid=2173, Unknown=1, NotChecked=0, Total=2652 [2022-11-23 14:44:14,444 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:14,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:44:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-23 14:44:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-23 14:44:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:44:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-11-23 14:44:14,454 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 192 [2022-11-23 14:44:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:14,455 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-11-23 14:44:14,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:44:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-11-23 14:44:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-23 14:44:14,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:14,459 INFO L195 NwaCegarLoop]: trace histogram [100, 69, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:14,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:44:14,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:44:14,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:44:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:14,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1571786263, now seen corresponding path program 12 times [2022-11-23 14:44:14,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:14,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480970558] [2022-11-23 14:44:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:14,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-23 14:44:16,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:16,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480970558] [2022-11-23 14:44:16,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480970558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:16,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973181533] [2022-11-23 14:44:16,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:44:16,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:16,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:16,605 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:16,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:44:17,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:44:17,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:44:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:44:17,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 1154 proven. 276 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-23 14:44:17,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-11-23 14:44:18,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973181533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:44:18,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1932171701] [2022-11-23 14:44:18,337 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:44:18,338 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:44:18,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:44:18,339 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:44:18,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:44:18,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,383 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:44:18,383 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 [2022-11-23 14:44:18,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,399 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 [2022-11-23 14:44:18,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-23 14:44:18,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:44:18,570 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-23 14:44:18,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-23 14:44:18,681 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 [2022-11-23 14:44:18,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:44:18,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-23 14:44:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:18,954 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-23 14:44:18,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-23 14:44:19,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:44:19,024 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 [2022-11-23 14:44:19,142 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:44:19,228 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:20,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12296#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_72 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:44:20,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:20,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:20,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-11-23 14:44:20,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488651400] [2022-11-23 14:44:20,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:20,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 14:44:20,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:20,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 14:44:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-23 14:44:20,680 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:44:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:20,821 INFO L93 Difference]: Finished difference Result 226 states and 260 transitions. [2022-11-23 14:44:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 14:44:20,823 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 203 [2022-11-23 14:44:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:20,825 INFO L225 Difference]: With dead ends: 226 [2022-11-23 14:44:20,825 INFO L226 Difference]: Without dead ends: 177 [2022-11-23 14:44:20,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-23 14:44:20,827 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:20,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:44:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-23 14:44:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-11-23 14:44:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:44:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-11-23 14:44:20,841 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 203 [2022-11-23 14:44:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:20,841 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-11-23 14:44:20,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:44:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-11-23 14:44:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-23 14:44:20,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:20,844 INFO L195 NwaCegarLoop]: trace histogram [144, 100, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:20,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:44:21,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:44:21,054 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:44:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1382861838, now seen corresponding path program 13 times [2022-11-23 14:44:21,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:21,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787116454] [2022-11-23 14:44:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:21,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 0 proven. 5980 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-23 14:44:26,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:26,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787116454] [2022-11-23 14:44:26,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787116454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:26,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70595449] [2022-11-23 14:44:26,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:44:26,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:26,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:26,208 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:26,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 14:44:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:27,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 14:44:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 4804 proven. 1176 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-23 14:44:27,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 0 proven. 5980 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-11-23 14:44:31,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70595449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:44:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912320634] [2022-11-23 14:44:31,196 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:44:31,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:44:31,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:44:31,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:44:31,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:44:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,237 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:44:31,239 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 [2022-11-23 14:44:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,252 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 [2022-11-23 14:44:31,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-23 14:44:31,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:44:31,418 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-23 14:44:31,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-23 14:44:31,524 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 [2022-11-23 14:44:31,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:44:31,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:44:31,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:44:31,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:31,754 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:44:31,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:44:31,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:44:31,800 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 [2022-11-23 14:44:31,908 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:44:31,977 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:33,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14855#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_77 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_77 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_77 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_77 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:44:33,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:33,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:33,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-11-23 14:44:33,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703948887] [2022-11-23 14:44:33,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:33,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 14:44:33,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 14:44:33,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-23 14:44:33,950 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:44:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:34,246 INFO L93 Difference]: Finished difference Result 301 states and 360 transitions. [2022-11-23 14:44:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 14:44:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 278 [2022-11-23 14:44:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:34,254 INFO L225 Difference]: With dead ends: 301 [2022-11-23 14:44:34,254 INFO L226 Difference]: Without dead ends: 227 [2022-11-23 14:44:34,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-23 14:44:34,258 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:34,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:44:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-23 14:44:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-11-23 14:44:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:44:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2022-11-23 14:44:34,278 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 278 [2022-11-23 14:44:34,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:34,279 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2022-11-23 14:44:34,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:44:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2022-11-23 14:44:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-11-23 14:44:34,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:34,286 INFO L195 NwaCegarLoop]: trace histogram [294, 100, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:34,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:44:34,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:44:34,495 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:44:34,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash 504703534, now seen corresponding path program 14 times [2022-11-23 14:44:34,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:34,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572347515] [2022-11-23 14:44:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:34,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 0 proven. 24455 refuted. 0 times theorem prover too weak. 24662 trivial. 0 not checked. [2022-11-23 14:44:50,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:50,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572347515] [2022-11-23 14:44:50,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572347515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:50,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849561912] [2022-11-23 14:44:50,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:44:50,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:50,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:50,049 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:50,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 14:44:51,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-23 14:44:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:44:51,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 14:44:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 19606 proven. 105 refuted. 0 times theorem prover too weak. 29406 trivial. 0 not checked. [2022-11-23 14:44:52,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 49012 trivial. 0 not checked. [2022-11-23 14:44:54,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849561912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:44:54,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447937470] [2022-11-23 14:44:54,097 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:44:54,097 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:44:54,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:44:54,098 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:44:54,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:44:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,130 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:44:54,131 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 [2022-11-23 14:44:54,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,163 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:44:54,164 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 [2022-11-23 14:44:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-23 14:44:54,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:44:54,340 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-23 14:44:54,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-23 14:44:54,441 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 [2022-11-23 14:44:54,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:44:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:44:54,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:44:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:54,749 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:44:54,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:44:54,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:44:54,798 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 [2022-11-23 14:44:54,942 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:44:55,042 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:58,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18594#(and (exists ((v_bor_~res~0_BEFORE_RETURN_84 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_84 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_84 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_84 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:44:58,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:58,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:58,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 17, 17] total 131 [2022-11-23 14:44:58,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701219224] [2022-11-23 14:44:58,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:58,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-23 14:44:58,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-23 14:44:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5605, Invalid=14987, Unknown=0, NotChecked=0, Total=20592 [2022-11-23 14:44:58,213 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:44:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:58,579 INFO L93 Difference]: Finished difference Result 368 states and 394 transitions. [2022-11-23 14:44:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-23 14:44:58,580 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 428 [2022-11-23 14:44:58,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:58,582 INFO L225 Difference]: With dead ends: 368 [2022-11-23 14:44:58,583 INFO L226 Difference]: Without dead ends: 244 [2022-11-23 14:44:58,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1241 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4808 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=5605, Invalid=14987, Unknown=0, NotChecked=0, Total=20592 [2022-11-23 14:44:58,587 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:58,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:44:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-23 14:44:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-11-23 14:44:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:44:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 248 transitions. [2022-11-23 14:44:58,615 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 248 transitions. Word has length 428 [2022-11-23 14:44:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:58,616 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 248 transitions. [2022-11-23 14:44:58,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:44:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 248 transitions. [2022-11-23 14:44:58,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-11-23 14:44:58,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:58,623 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:58,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:44:58,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:44:58,834 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:44:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1040970281, now seen corresponding path program 15 times [2022-11-23 14:44:58,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:58,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072437289] [2022-11-23 14:44:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:58,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-23 14:45:02,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:02,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072437289] [2022-11-23 14:45:02,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072437289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:02,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720424921] [2022-11-23 14:45:02,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:45:02,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:02,827 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:02,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 14:45:03,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:45:03,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:03,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2436 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 14:45:03,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 20004 proven. 465 refuted. 0 times theorem prover too weak. 29902 trivial. 0 not checked. [2022-11-23 14:45:04,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-23 14:45:05,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720424921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:05,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [696419467] [2022-11-23 14:45:05,718 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:45:05,719 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:05,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:05,719 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:05,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:05,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:05,752 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:45:05,753 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 [2022-11-23 14:45:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:05,786 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:45:05,786 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 [2022-11-23 14:45:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:05,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-23 14:45:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:05,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:05,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:05,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:05,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:05,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:45:05,943 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-23 14:45:05,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-23 14:45:06,048 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 [2022-11-23 14:45:06,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:06,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:45:06,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:06,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-23 14:45:06,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:06,307 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-23 14:45:06,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-23 14:45:06,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:45:06,380 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 [2022-11-23 14:45:06,491 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:45:06,580 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:10,139 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22549#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:45:10,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:10,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:10,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-11-23 14:45:10,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821824899] [2022-11-23 14:45:10,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:10,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-23 14:45:10,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-23 14:45:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2140, Invalid=3866, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 14:45:10,143 INFO L87 Difference]: Start difference. First operand 244 states and 248 transitions. Second operand has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:45:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:10,275 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2022-11-23 14:45:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-23 14:45:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 447 [2022-11-23 14:45:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:10,278 INFO L225 Difference]: With dead ends: 383 [2022-11-23 14:45:10,278 INFO L226 Difference]: Without dead ends: 276 [2022-11-23 14:45:10,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1372 GetRequests, 1296 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2140, Invalid=3866, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 14:45:10,281 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:10,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:45:10,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-23 14:45:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-11-23 14:45:10,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:45:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-11-23 14:45:10,299 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 447 [2022-11-23 14:45:10,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:10,299 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-11-23 14:45:10,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:45:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-11-23 14:45:10,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-11-23 14:45:10,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:10,304 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 62, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:10,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:10,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:45:10,511 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash -130551767, now seen corresponding path program 16 times [2022-11-23 14:45:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:10,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023244387] [2022-11-23 14:45:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:10,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-23 14:45:18,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:18,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023244387] [2022-11-23 14:45:18,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023244387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:18,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211180222] [2022-11-23 14:45:18,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:45:18,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:18,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:18,711 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:18,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 14:45:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:19,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-23 14:45:19,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 20004 proven. 1953 refuted. 0 times theorem prover too weak. 29902 trivial. 0 not checked. [2022-11-23 14:45:19,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-11-23 14:45:23,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211180222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:23,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2089450118] [2022-11-23 14:45:23,989 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:45:23,989 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:23,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:23,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:23,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:24,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,024 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:45:24,025 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 [2022-11-23 14:45:24,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,054 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:45:24,054 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 [2022-11-23 14:45:24,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-23 14:45:24,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,187 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-23 14:45:24,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-23 14:45:24,228 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 [2022-11-23 14:45:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-23 14:45:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:45:24,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-23 14:45:24,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:24,415 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-23 14:45:24,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-23 14:45:24,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 14:45:24,445 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 [2022-11-23 14:45:24,536 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-11-23 14:45:24,599 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:28,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26829#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_96 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_96 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_96 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_96 4294967296) (- 4294967296))))))' at error location [2022-11-23 14:45:28,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:28,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:28,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 102 [2022-11-23 14:45:28,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911004050] [2022-11-23 14:45:28,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:28,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-23 14:45:28,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:28,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-23 14:45:28,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5211, Invalid=7899, Unknown=0, NotChecked=0, Total=13110 [2022-11-23 14:45:28,395 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:45:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:28,602 INFO L93 Difference]: Finished difference Result 420 states and 461 transitions. [2022-11-23 14:45:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-23 14:45:28,603 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 479 [2022-11-23 14:45:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:28,605 INFO L225 Difference]: With dead ends: 420 [2022-11-23 14:45:28,605 INFO L226 Difference]: Without dead ends: 313 [2022-11-23 14:45:28,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1360 SyntacticMatches, 27 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=5211, Invalid=7899, Unknown=0, NotChecked=0, Total=13110 [2022-11-23 14:45:28,608 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:28,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:45:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-23 14:45:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-11-23 14:45:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0097402597402598) internal successors, (311), 308 states have internal predecessors, (311), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:45:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 317 transitions. [2022-11-23 14:45:28,626 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 317 transitions. Word has length 479 [2022-11-23 14:45:28,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:28,627 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 317 transitions. [2022-11-23 14:45:28,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:45:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 317 transitions. [2022-11-23 14:45:28,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-11-23 14:45:28,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:28,632 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 99, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:28,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:28,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562918ed-f125-459b-bd0d-235e7c687eb4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:28,846 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1740799112, now seen corresponding path program 17 times [2022-11-23 14:45:28,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:28,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765193827] [2022-11-23 14:45:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:28,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms