./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/nr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/nr5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7a05e17fa6f76d5004d5085f0b83441da7dbecb194f05c3b661e69c00b5f4df0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:58:29,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:58:29,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:58:30,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:58:30,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:58:30,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:58:30,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:58:30,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:58:30,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:58:30,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:58:30,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:58:30,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:58:30,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:58:30,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:58:30,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:58:30,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:58:30,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:58:30,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:58:30,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:58:30,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:58:30,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:58:30,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:58:30,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:58:30,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:58:30,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:58:30,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:58:30,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:58:30,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:58:30,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:58:30,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:58:30,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:58:30,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:58:30,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:58:30,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:58:30,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:58:30,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:58:30,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:58:30,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:58:30,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:58:30,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:58:30,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:58:30,090 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:58:30,138 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:58:30,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:58:30,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:58:30,139 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:58:30,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:58:30,140 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:58:30,140 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:58:30,140 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:58:30,140 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:58:30,141 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:58:30,142 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:58:30,142 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:58:30,142 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:58:30,143 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:58:30,143 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:58:30,143 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:58:30,143 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:58:30,144 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:58:30,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:58:30,145 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:58:30,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:58:30,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:58:30,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:58:30,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:58:30,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:58:30,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:58:30,148 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:58:30,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:58:30,149 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:58:30,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:58:30,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:58:30,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:58:30,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:58:30,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:58:30,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:58:30,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:58:30,151 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:58:30,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:58:30,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:58:30,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:58:30,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:58:30,152 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a05e17fa6f76d5004d5085f0b83441da7dbecb194f05c3b661e69c00b5f4df0 [2021-11-25 19:58:30,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:58:30,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:58:30,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:58:30,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:58:30,525 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:58:30,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-tiling/nr5.c [2021-11-25 19:58:30,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/data/bdea2cfff/bf247fc3afb948e58d5bd4face0bb939/FLAG812003ffe [2021-11-25 19:58:31,063 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:58:31,064 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/sv-benchmarks/c/array-tiling/nr5.c [2021-11-25 19:58:31,082 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/data/bdea2cfff/bf247fc3afb948e58d5bd4face0bb939/FLAG812003ffe [2021-11-25 19:58:31,472 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/data/bdea2cfff/bf247fc3afb948e58d5bd4face0bb939 [2021-11-25 19:58:31,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:58:31,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:58:31,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:58:31,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:58:31,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:58:31,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd6d49a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31, skipping insertion in model container [2021-11-25 19:58:31,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:58:31,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:58:31,629 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/sv-benchmarks/c/array-tiling/nr5.c[394,407] [2021-11-25 19:58:31,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:58:31,654 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:58:31,668 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/sv-benchmarks/c/array-tiling/nr5.c[394,407] [2021-11-25 19:58:31,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:58:31,690 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:58:31,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31 WrapperNode [2021-11-25 19:58:31,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:58:31,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:58:31,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:58:31,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:58:31,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,728 INFO L137 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2021-11-25 19:58:31,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:58:31,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:58:31,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:58:31,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:58:31,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:58:31,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:58:31,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:58:31,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:58:31,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (1/1) ... [2021-11-25 19:58:31,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:58:31,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:31,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:58:31,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:58:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:58:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:58:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:58:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:58:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:58:31,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:58:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:58:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:58:31,877 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:58:31,879 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:58:32,016 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:58:32,080 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:58:32,086 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 19:58:32,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:58:32 BoogieIcfgContainer [2021-11-25 19:58:32,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:58:32,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:58:32,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:58:32,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:58:32,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:58:31" (1/3) ... [2021-11-25 19:58:32,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0aaec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:58:32, skipping insertion in model container [2021-11-25 19:58:32,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:31" (2/3) ... [2021-11-25 19:58:32,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0aaec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:58:32, skipping insertion in model container [2021-11-25 19:58:32,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:58:32" (3/3) ... [2021-11-25 19:58:32,117 INFO L111 eAbstractionObserver]: Analyzing ICFG nr5.c [2021-11-25 19:58:32,121 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:58:32,127 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:58:32,224 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:58:32,235 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:58:32,236 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:58:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:58:32,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:32,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:32,271 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1530238989, now seen corresponding path program 1 times [2021-11-25 19:58:32,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:32,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094407460] [2021-11-25 19:58:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:32,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:32,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:32,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094407460] [2021-11-25 19:58:32,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094407460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:32,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:32,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:58:32,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472435517] [2021-11-25 19:58:32,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:32,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:32,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:32,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:32,779 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:32,838 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-11-25 19:58:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:58:32,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 19:58:32,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:32,848 INFO L225 Difference]: With dead ends: 26 [2021-11-25 19:58:32,848 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 19:58:32,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:32,855 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:32,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 19:58:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-25 19:58:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-25 19:58:32,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2021-11-25 19:58:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:32,889 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-25 19:58:32,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-25 19:58:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:58:32,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:32,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:32,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:58:32,891 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:32,892 INFO L85 PathProgramCache]: Analyzing trace with hash 646031458, now seen corresponding path program 1 times [2021-11-25 19:58:32,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:32,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85686731] [2021-11-25 19:58:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:32,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:32,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:32,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85686731] [2021-11-25 19:58:32,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85686731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:32,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:32,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:58:32,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384346384] [2021-11-25 19:58:32,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:32,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:58:32,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:32,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:58:32,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:58:32,983 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:33,019 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-25 19:58:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:58:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:58:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:33,022 INFO L225 Difference]: With dead ends: 19 [2021-11-25 19:58:33,022 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 19:58:33,022 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:58:33,024 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 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 [2021-11-25 19:58:33,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 19:58:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-25 19:58:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-25 19:58:33,030 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-25 19:58:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:33,031 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-25 19:58:33,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-25 19:58:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:58:33,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:33,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:33,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:58:33,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1553202252, now seen corresponding path program 1 times [2021-11-25 19:58:33,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:33,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360501848] [2021-11-25 19:58:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:33,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:33,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:33,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360501848] [2021-11-25 19:58:33,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360501848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:33,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635416140] [2021-11-25 19:58:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:33,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:33,149 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:33,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:58:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:33,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:58:33,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:33,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:33,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635416140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:58:33,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473797076] [2021-11-25 19:58:33,363 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:58:33,364 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:58:33,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:58:33,373 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:58:33,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:58:33,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:33,515 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-25 19:58:33,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-25 19:58:33,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:33,580 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:58:33,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:58:33,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:33,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:33,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-25 19:58:33,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:58:33,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:33,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 46 [2021-11-25 19:58:34,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,275 INFO L354 Elim1Store]: treesize reduction 306, result has 12.3 percent of original size [2021-11-25 19:58:34,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-25 19:58:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,503 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-25 19:58:34,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 596 treesize of output 496 [2021-11-25 19:58:34,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:34,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:58:34,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 598 treesize of output 510 [2021-11-25 19:58:35,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 19:58:35,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 19:58:35,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 19:58:35,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 19:58:35,379 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:58:36,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '178#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (< |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~MINVAL~0#1|) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 0)) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:58:36,246 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:58:36,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:58:36,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-25 19:58:36,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617459084] [2021-11-25 19:58:36,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:58:36,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:58:36,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:58:36,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:58:36,249 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:36,281 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2021-11-25 19:58:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:58:36,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:58:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:36,282 INFO L225 Difference]: With dead ends: 23 [2021-11-25 19:58:36,282 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 19:58:36,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:58:36,284 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:36,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 19:58:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 19:58:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-25 19:58:36,289 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2021-11-25 19:58:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:36,290 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-25 19:58:36,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-25 19:58:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:58:36,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:36,291 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:36,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:58:36,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-25 19:58:36,513 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:36,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1004989666, now seen corresponding path program 2 times [2021-11-25 19:58:36,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:36,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003233536] [2021-11-25 19:58:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:36,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:36,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:36,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003233536] [2021-11-25 19:58:36,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003233536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:36,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703194374] [2021-11-25 19:58:36,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:58:36,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:36,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:36,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:58:36,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:58:36,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:58:36,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:58:36,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:36,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:36,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703194374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:58:36,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171954799] [2021-11-25 19:58:36,794 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:58:36,794 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:58:36,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:58:36,795 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:58:36,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:58:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:36,845 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:58:36,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:58:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:36,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-25 19:58:36,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:36,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2021-11-25 19:58:37,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:37,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:37,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:37,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:37,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:37,220 INFO L354 Elim1Store]: treesize reduction 346, result has 18.6 percent of original size [2021-11-25 19:58:37,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 510 treesize of output 583 [2021-11-25 19:58:37,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:37,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:37,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:37,610 INFO L354 Elim1Store]: treesize reduction 88, result has 10.2 percent of original size [2021-11-25 19:58:37,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 17 case distinctions, treesize of input 1037 treesize of output 921 [2021-11-25 19:58:38,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:38,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:38,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:38,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:38,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:38,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:38,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:38,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:38,093 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:58:38,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 1039 treesize of output 922 [2021-11-25 19:58:38,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 19:58:38,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 19:58:38,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 19:58:38,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 19:58:38,879 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:58:39,683 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '323#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (< |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~MINVAL~0#1|) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 0)) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:58:39,683 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:58:39,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:58:39,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2021-11-25 19:58:39,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354142114] [2021-11-25 19:58:39,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:58:39,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:58:39,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:39,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:58:39,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:58:39,686 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:39,716 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-25 19:58:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:58:39,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 19:58:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:39,718 INFO L225 Difference]: With dead ends: 27 [2021-11-25 19:58:39,718 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 19:58:39,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:58:39,725 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:39,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 19:58:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 19:58:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-25 19:58:39,736 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2021-11-25 19:58:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:39,737 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-25 19:58:39,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-25 19:58:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:58:39,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:39,738 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:39,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 19:58:39,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:39,955 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:58:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:39,957 INFO L85 PathProgramCache]: Analyzing trace with hash 984567604, now seen corresponding path program 3 times [2021-11-25 19:58:39,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:39,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996590859] [2021-11-25 19:58:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:39,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:40,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996590859] [2021-11-25 19:58:40,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996590859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126412738] [2021-11-25 19:58:40,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:58:40,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:40,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:40,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:40,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:58:40,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:58:40,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:58:40,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 19:58:40,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:40,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:58:40,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 46 [2021-11-25 19:58:40,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:40,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 26 [2021-11-25 19:58:40,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 46 [2021-11-25 19:58:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:40,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 26 [2021-11-25 19:58:40,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:58:40,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:40,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2021-11-25 19:58:40,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-25 19:58:40,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:40,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 23 [2021-11-25 19:58:40,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 19:58:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:40,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:41,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:58:41,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-11-25 19:59:27,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:59:27,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2021-11-25 19:59:28,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:59:28,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 19:59:28,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 119 [2021-11-25 19:59:28,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:59:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3601 treesize of output 3591 [2021-11-25 19:59:28,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-25 19:59:28,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460845671] [2021-11-25 19:59:28,123 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:59:28,123 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:28,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:28,124 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:28,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:28,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,171 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-25 19:59:28,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-25 19:59:28,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,213 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:59:28,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:59:28,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-25 19:59:28,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:59:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 71 [2021-11-25 19:59:28,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,598 INFO L354 Elim1Store]: treesize reduction 306, result has 12.3 percent of original size [2021-11-25 19:59:28,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-25 19:59:28,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:59:28,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:59:28,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,845 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-25 19:59:28,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 750 treesize of output 642 [2021-11-25 19:59:28,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 19:59:28,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 19:59:29,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 19:59:29,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 19:59:29,188 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:30,144 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '486#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (< |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~MINVAL~0#1|) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 0)) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:30,145 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:30,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:30,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-25 19:59:30,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799424237] [2021-11-25 19:59:30,145 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:30,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:59:30,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:59:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=577, Unknown=23, NotChecked=0, Total=702 [2021-11-25 19:59:30,147 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:34,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:34,341 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-25 19:59:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:59:34,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 19:59:34,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:34,342 INFO L225 Difference]: With dead ends: 32 [2021-11-25 19:59:34,342 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 19:59:34,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=126, Invalid=719, Unknown=25, NotChecked=0, Total=870 [2021-11-25 19:59:34,344 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:34,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 19:59:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2021-11-25 19:59:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-25 19:59:34,352 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-11-25 19:59:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:34,352 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-25 19:59:34,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-25 19:59:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:59:34,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:34,353 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:34,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:34,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:34,577 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:59:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash 927105345, now seen corresponding path program 1 times [2021-11-25 19:59:34,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:34,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660126895] [2021-11-25 19:59:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:34,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:35,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:35,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660126895] [2021-11-25 19:59:35,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660126895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:35,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467484260] [2021-11-25 19:59:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:35,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:35,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:35,067 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:35,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:59:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:35,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 19:59:35,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:35,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-11-25 19:59:35,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 [2021-11-25 19:59:35,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 46 [2021-11-25 19:59:35,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:35,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 26 [2021-11-25 19:59:35,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:59:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:35,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2021-11-25 19:59:35,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-25 19:59:35,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:35,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 23 [2021-11-25 19:59:35,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 19:59:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:35,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:35,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:59:35,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2021-11-25 20:00:01,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:01,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2021-11-25 20:00:01,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:01,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 20:00:01,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2021-11-25 20:00:01,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 105 [2021-11-25 20:00:01,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:01,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 485 treesize of output 485 [2021-11-25 20:00:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:05,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467484260] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:00:05,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [89314938] [2021-11-25 20:00:05,582 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:00:05,583 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:00:05,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:00:05,583 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:00:05,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:00:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:05,651 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:00:05,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:00:05,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:05,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-25 20:00:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:05,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2021-11-25 20:00:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:05,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:05,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:05,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:05,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:05,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:00:06,011 INFO L354 Elim1Store]: treesize reduction 346, result has 18.6 percent of original size [2021-11-25 20:00:06,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 510 treesize of output 583 [2021-11-25 20:00:06,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:06,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 72 [2021-11-25 20:00:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:06,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:00:06,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 84 [2021-11-25 20:00:06,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:06,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:06,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 75 [2021-11-25 20:00:06,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:06,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:06,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:06,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:06,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:06,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:06,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:06,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:00:06,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:00:06,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:00:06,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:00:07,402 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:00:08,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '697#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:00:08,166 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:00:08,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:00:08,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2021-11-25 20:00:08,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575595853] [2021-11-25 20:00:08,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:00:08,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:00:08,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:00:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:00:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=887, Unknown=14, NotChecked=0, Total=1056 [2021-11-25 20:00:08,169 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:00:14,513 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-25 20:00:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:00:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 20:00:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:00:14,514 INFO L225 Difference]: With dead ends: 38 [2021-11-25 20:00:14,514 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 20:00:14,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=253, Invalid=1370, Unknown=17, NotChecked=0, Total=1640 [2021-11-25 20:00:14,516 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:00:14,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 35 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 146 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2021-11-25 20:00:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 20:00:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2021-11-25 20:00:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-25 20:00:14,521 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2021-11-25 20:00:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:00:14,522 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-25 20:00:14,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-25 20:00:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:00:14,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:00:14,523 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:00:14,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:00:14,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:14,723 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:00:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:00:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1534068716, now seen corresponding path program 2 times [2021-11-25 20:00:14,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:00:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563458154] [2021-11-25 20:00:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:14,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:00:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:15,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:00:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563458154] [2021-11-25 20:00:15,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563458154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:00:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536208617] [2021-11-25 20:00:15,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:00:15,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:15,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:00:15,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:00:15,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:00:15,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 20:00:15,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:00:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 20:00:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:00:15,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 36 [2021-11-25 20:00:15,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 14 [2021-11-25 20:00:15,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 51 [2021-11-25 20:00:15,219 INFO L354 Elim1Store]: treesize reduction 42, result has 30.0 percent of original size [2021-11-25 20:00:15,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:00:15,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-11-25 20:00:15,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 52 [2021-11-25 20:00:15,328 INFO L354 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2021-11-25 20:00:15,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 42 [2021-11-25 20:00:15,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:00:15,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-25 20:00:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:15,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:00:15,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:00:15,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2021-11-25 20:00:18,022 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~j~0#1| Int)) (or (<= 3 |ULTIMATE.start_main_~j~0#1|) (and (< |ULTIMATE.start_main_~j~0#1| (+ |c_ULTIMATE.start_main_~MINVAL~0#1| 1)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |ULTIMATE.start_main_~j~0#1|) (forall ((v_ArrVal_219 Int) (v_ArrVal_217 Int)) (let ((.cse0 (select (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 20)) (.cse2 (* |ULTIMATE.start_main_~j~0#1| (- 4)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 .cse2) v_ArrVal_217) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 .cse2 4) v_ArrVal_219)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse0) (= .cse0 0))))) (< |ULTIMATE.start_main_~j~0#1| 2))) is different from false [2021-11-25 20:00:18,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:18,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2021-11-25 20:00:18,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:18,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 20:00:18,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2021-11-25 20:00:18,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2021-11-25 20:00:18,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:18,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 233 [2021-11-25 20:00:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 20:00:18,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536208617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:00:18,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559992218] [2021-11-25 20:00:18,383 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:00:18,383 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:00:18,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:00:18,383 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:00:18,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:00:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,435 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:00:18,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:00:18,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-25 20:00:18,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-25 20:00:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 54 [2021-11-25 20:00:18,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,760 INFO L354 Elim1Store]: treesize reduction 306, result has 12.3 percent of original size [2021-11-25 20:00:18,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-25 20:00:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 90 [2021-11-25 20:00:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:18,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 90 [2021-11-25 20:00:18,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:19,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:19,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:00:19,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:00:19,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:00:19,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:00:19,509 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:00:20,155 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '959#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:00:20,155 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:00:20,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:00:20,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 29 [2021-11-25 20:00:20,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713808027] [2021-11-25 20:00:20,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:00:20,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 20:00:20,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:00:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 20:00:20,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1085, Unknown=1, NotChecked=68, Total=1332 [2021-11-25 20:00:20,157 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:22,239 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (<= 3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20) (- 12)))) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= 2 |c_ULTIMATE.start_main_~j~0#1|) (<= 3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (<= |c_ULTIMATE.start_main_~j~0#1| 2) (forall ((|ULTIMATE.start_main_~j~0#1| Int)) (or (<= 3 |ULTIMATE.start_main_~j~0#1|) (and (< |ULTIMATE.start_main_~j~0#1| (+ |c_ULTIMATE.start_main_~MINVAL~0#1| 1)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |ULTIMATE.start_main_~j~0#1|) (forall ((v_ArrVal_219 Int) (v_ArrVal_217 Int)) (let ((.cse1 (select (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 20)) (.cse3 (* |ULTIMATE.start_main_~j~0#1| (- 4)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse2 .cse3) v_ArrVal_217) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse2 .cse3 4) v_ArrVal_219)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse1) (= .cse1 0))))) (< |ULTIMATE.start_main_~j~0#1| 2))))) is different from false [2021-11-25 20:00:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:00:22,719 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-25 20:00:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:00:22,720 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 20:00:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:00:22,721 INFO L225 Difference]: With dead ends: 41 [2021-11-25 20:00:22,721 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 20:00:22,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=340, Invalid=1922, Unknown=2, NotChecked=186, Total=2450 [2021-11-25 20:00:22,723 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:00:22,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 46 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 233 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2021-11-25 20:00:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 20:00:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2021-11-25 20:00:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-25 20:00:22,738 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2021-11-25 20:00:22,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:00:22,739 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-25 20:00:22,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-25 20:00:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 20:00:22,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:00:22,742 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:00:22,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:00:22,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:22,957 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:00:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:00:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1311157345, now seen corresponding path program 3 times [2021-11-25 20:00:22,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:00:22,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255450427] [2021-11-25 20:00:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:22,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:00:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:23,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:00:23,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255450427] [2021-11-25 20:00:23,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255450427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:00:23,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589118931] [2021-11-25 20:00:23,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:00:23,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:23,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:00:23,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:00:23,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:00:23,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:00:23,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:00:23,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 20:00:23,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:00:23,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:00:23,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 20:00:23,572 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-25 20:00:23,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 20:00:23,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-25 20:00:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:23,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:00:24,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:00:24,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:24,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2021-11-25 20:00:24,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:24,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 20:00:24,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-25 20:00:24,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2021-11-25 20:00:24,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2021-11-25 20:00:24,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:24,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2021-11-25 20:00:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:24,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589118931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:00:24,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062353893] [2021-11-25 20:00:24,469 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:00:24,469 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:00:24,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:00:24,469 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:00:24,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:00:24,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,510 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-25 20:00:24,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-25 20:00:24,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,544 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:00:24,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:00:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2021-11-25 20:00:24,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:00:24,835 INFO L354 Elim1Store]: treesize reduction 346, result has 18.6 percent of original size [2021-11-25 20:00:24,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 510 treesize of output 583 [2021-11-25 20:00:24,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:00:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:24,935 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 20:00:24,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 612 treesize of output 510 [2021-11-25 20:00:25,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:00:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:25,140 INFO L354 Elim1Store]: treesize reduction 88, result has 10.2 percent of original size [2021-11-25 20:00:25,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 17 case distinctions, treesize of input 610 treesize of output 534 [2021-11-25 20:00:25,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:00:25,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:00:25,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:00:25,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:00:25,715 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:00:26,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1268#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:00:26,388 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:00:26,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:00:26,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2021-11-25 20:00:26,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697388820] [2021-11-25 20:00:26,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:00:26,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-25 20:00:26,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:00:26,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-25 20:00:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1845, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 20:00:26,392 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 38 states, 38 states have (on average 1.631578947368421) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:27,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:00:27,704 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-11-25 20:00:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 20:00:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.631578947368421) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-25 20:00:27,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:00:27,706 INFO L225 Difference]: With dead ends: 76 [2021-11-25 20:00:27,706 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 20:00:27,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=614, Invalid=4788, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 20:00:27,710 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:00:27,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 84 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 539 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2021-11-25 20:00:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 20:00:27,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 27. [2021-11-25 20:00:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-25 20:00:27,718 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2021-11-25 20:00:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:00:27,718 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-25 20:00:27,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.631578947368421) internal successors, (62), 38 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-25 20:00:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:00:27,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:00:27,720 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:00:27,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:00:27,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 20:00:27,945 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:00:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:00:27,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2033813260, now seen corresponding path program 4 times [2021-11-25 20:00:27,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:00:27,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648557474] [2021-11-25 20:00:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:27,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:00:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:28,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:00:28,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648557474] [2021-11-25 20:00:28,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648557474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:00:28,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824996907] [2021-11-25 20:00:28,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:00:28,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:28,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:00:28,240 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:00:28,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:00:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 20:00:28,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:00:28,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2021-11-25 20:00:28,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 [2021-11-25 20:00:28,889 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-11-25 20:00:28,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 36 [2021-11-25 20:00:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:28,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:00:29,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:29,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2021-11-25 20:00:29,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:29,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 20:00:29,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2021-11-25 20:00:29,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:29,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-11-25 20:00:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:29,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824996907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:00:29,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191841121] [2021-11-25 20:00:29,442 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:00:29,443 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:00:29,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:00:29,443 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:00:29,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:00:29,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,503 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-25 20:00:29,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-25 20:00:29,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,552 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:00:29,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:00:29,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-25 20:00:29,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:29,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 64 [2021-11-25 20:00:29,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,860 INFO L354 Elim1Store]: treesize reduction 306, result has 12.3 percent of original size [2021-11-25 20:00:29,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-25 20:00:29,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 92 [2021-11-25 20:00:29,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:29,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 87 [2021-11-25 20:00:30,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:30,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:30,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:00:30,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:00:30,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:00:30,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:00:30,618 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:00:31,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1678#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:00:31,331 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:00:31,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:00:31,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 33 [2021-11-25 20:00:31,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396836340] [2021-11-25 20:00:31,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:00:31,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 20:00:31,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:00:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 20:00:31,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 20:00:31,334 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:00:31,452 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-11-25 20:00:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:00:31,452 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 20:00:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:00:31,453 INFO L225 Difference]: With dead ends: 51 [2021-11-25 20:00:31,454 INFO L226 Difference]: Without dead ends: 49 [2021-11-25 20:00:31,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=224, Invalid=1498, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 20:00:31,455 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:00:31,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 99 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2021-11-25 20:00:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-25 20:00:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2021-11-25 20:00:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-25 20:00:31,467 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2021-11-25 20:00:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:00:31,468 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-25 20:00:31,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-25 20:00:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 20:00:31,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:00:31,470 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:00:31,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:00:31,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:31,686 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:00:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:00:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash -221905023, now seen corresponding path program 5 times [2021-11-25 20:00:31,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:00:31,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396132135] [2021-11-25 20:00:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:31,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:00:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:00:32,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:00:32,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396132135] [2021-11-25 20:00:32,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396132135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:00:32,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850080485] [2021-11-25 20:00:32,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:00:32,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:32,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:00:32,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:00:32,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:00:32,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 20:00:32,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:00:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:00:32,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:00:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:00:32,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:00:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:00:32,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850080485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:00:32,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2050045210] [2021-11-25 20:00:32,777 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:00:32,777 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:00:32,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:00:32,778 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:00:32,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:00:32,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:32,827 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-25 20:00:32,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-25 20:00:32,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:32,868 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:00:32,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:00:32,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:32,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-25 20:00:32,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:00:32,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:32,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 64 [2021-11-25 20:00:33,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,172 INFO L354 Elim1Store]: treesize reduction 306, result has 12.3 percent of original size [2021-11-25 20:00:33,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-25 20:00:33,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:00:33,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 598 treesize of output 498 [2021-11-25 20:00:33,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:00:33,528 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-25 20:00:33,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 591 treesize of output 503 [2021-11-25 20:00:33,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:00:33,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:00:33,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:00:33,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:00:34,062 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:00:34,728 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2018#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:00:34,728 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:00:34,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:00:34,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2021-11-25 20:00:34,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798989841] [2021-11-25 20:00:34,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:00:34,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 20:00:34,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:00:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 20:00:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 20:00:34,731 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:00:35,007 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-11-25 20:00:35,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:00:35,010 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-25 20:00:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:00:35,011 INFO L225 Difference]: With dead ends: 61 [2021-11-25 20:00:35,011 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 20:00:35,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 20:00:35,013 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:00:35,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 54 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:00:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 20:00:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-11-25 20:00:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-11-25 20:00:35,026 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 29 [2021-11-25 20:00:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:00:35,026 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-11-25 20:00:35,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-11-25 20:00:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 20:00:35,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:00:35,028 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:00:35,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:00:35,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:35,241 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:00:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:00:35,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1763074029, now seen corresponding path program 6 times [2021-11-25 20:00:35,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:00:35,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458099851] [2021-11-25 20:00:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:35,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:00:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:35,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:00:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458099851] [2021-11-25 20:00:35,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458099851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:00:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118960222] [2021-11-25 20:00:35,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:00:35,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:35,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:00:35,902 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:00:35,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:00:36,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:00:36,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:00:36,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 20:00:36,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:00:36,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 36 [2021-11-25 20:00:36,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 14 [2021-11-25 20:00:36,284 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-25 20:00:36,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-11-25 20:00:36,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 48 [2021-11-25 20:00:36,350 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-25 20:00:36,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-11-25 20:00:36,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 48 [2021-11-25 20:00:36,433 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-25 20:00:36,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-11-25 20:00:36,511 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-25 20:00:36,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-11-25 20:00:36,591 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-25 20:00:36,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-25 20:00:36,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-25 20:00:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:37,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:00:37,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:00:37,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 20:00:39,469 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_158| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_158| 1)) (and (or (= (+ 16 (* 4 |v_ULTIMATE.start_main_~j~0#1_158|)) (* 20 |c_ULTIMATE.start_main_~i~0#1|)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~j~0#1|)) (or (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|) (and (< |v_ULTIMATE.start_main_~j~0#1_158| |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((v_ArrVal_460 Int)) (= (select (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) v_ArrVal_460) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_158| (- 4)) .cse0) 0)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 16)) 0))))))) is different from false [2021-11-25 20:02:00,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:00,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2021-11-25 20:02:00,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:00,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 20:02:00,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:02:00,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:00,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-11-25 20:02:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2021-11-25 20:02:00,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118960222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:02:00,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1975751510] [2021-11-25 20:02:00,796 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:02:00,796 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:02:00,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:02:00,797 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:02:00,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:02:00,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:00,866 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-25 20:02:00,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-25 20:02:00,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:00,916 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:02:00,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:02:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:00,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-25 20:02:01,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 52 [2021-11-25 20:02:01,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:01,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,224 INFO L354 Elim1Store]: treesize reduction 306, result has 12.3 percent of original size [2021-11-25 20:02:01,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-25 20:02:01,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:01,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:01,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:01,409 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-25 20:02:01,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 750 treesize of output 634 [2021-11-25 20:02:01,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:02:01,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:02:01,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:02:01,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:02:01,882 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:02:02,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2431#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:02:02,925 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:02:02,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:02:02,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 53 [2021-11-25 20:02:02,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707989580] [2021-11-25 20:02:02,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:02:02,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-25 20:02:02,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-25 20:02:02,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=3200, Unknown=41, NotChecked=116, Total=3660 [2021-11-25 20:02:02,929 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 53 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 53 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:09,203 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-11-25 20:02:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-25 20:02:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 53 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-25 20:02:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:09,205 INFO L225 Difference]: With dead ends: 129 [2021-11-25 20:02:09,205 INFO L226 Difference]: Without dead ends: 104 [2021-11-25 20:02:09,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 90.3s TimeCoverageRelationStatistics Valid=785, Invalid=8490, Unknown=41, NotChecked=190, Total=9506 [2021-11-25 20:02:09,210 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:09,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 285 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 792 Invalid, 0 Unknown, 197 Unchecked, 0.6s Time] [2021-11-25 20:02:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-25 20:02:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 51. [2021-11-25 20:02:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-11-25 20:02:09,236 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 33 [2021-11-25 20:02:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:09,237 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-11-25 20:02:09,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 53 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-11-25 20:02:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 20:02:09,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:09,239 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:09,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:09,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:09,453 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash -578056190, now seen corresponding path program 7 times [2021-11-25 20:02:09,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:09,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249042362] [2021-11-25 20:02:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:09,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 96 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:02:10,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:10,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249042362] [2021-11-25 20:02:10,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249042362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:02:10,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527793986] [2021-11-25 20:02:10,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:02:10,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:10,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:10,030 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:02:10,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:02:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:10,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 20:02:10,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:10,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-11-25 20:02:10,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 [2021-11-25 20:02:10,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 56 [2021-11-25 20:02:10,322 INFO L354 Elim1Store]: treesize reduction 57, result has 20.8 percent of original size [2021-11-25 20:02:10,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2021-11-25 20:02:10,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 56 [2021-11-25 20:02:10,433 INFO L354 Elim1Store]: treesize reduction 57, result has 20.8 percent of original size [2021-11-25 20:02:10,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2021-11-25 20:02:10,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 51 [2021-11-25 20:02:10,555 INFO L354 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2021-11-25 20:02:10,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-11-25 20:02:10,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 51 [2021-11-25 20:02:10,722 INFO L354 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2021-11-25 20:02:10,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-11-25 20:02:11,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-25 20:02:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:02:11,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:02:11,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:02:11,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2021-11-25 20:02:13,786 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_182| Int)) (or (and (< |v_ULTIMATE.start_main_~j~0#1_182| |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((v_ArrVal_562 Int) (v_ArrVal_557 Int)) (let ((.cse0 (select (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) v_ArrVal_557) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (* |v_ULTIMATE.start_main_~j~0#1_182| (- 4))) v_ArrVal_562)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse0) (= .cse0 0)))) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~j~0#1|)) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_182| 1)))) is different from false [2021-11-25 20:02:15,937 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_182| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_182| 2)) (and (< |v_ULTIMATE.start_main_~j~0#1_182| |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= (+ |c_ULTIMATE.start_main_~MINVAL~0#1| 1) |c_ULTIMATE.start_main_~j~0#1|) (forall ((v_ArrVal_562 Int) (v_ArrVal_557 Int) (v_ArrVal_556 Int)) (let ((.cse0 (select (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 20))) (store (let ((.cse2 (* |c_ULTIMATE.start_main_~j~0#1| (- 4)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 .cse2) v_ArrVal_556) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 .cse2 4) v_ArrVal_557)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (* |v_ULTIMATE.start_main_~j~0#1_182| (- 4))) v_ArrVal_562)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse0) (= .cse0 0))))))) is different from false [2021-11-25 20:02:32,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:32,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2021-11-25 20:02:32,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:32,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 20:02:32,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2021-11-25 20:02:32,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 127 [2021-11-25 20:02:32,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:32,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67245 treesize of output 66741 [2021-11-25 20:02:32,542 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-25 20:02:32,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125415979] [2021-11-25 20:02:32,544 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:02:32,544 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:02:32,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:02:32,545 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:02:32,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:02:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,606 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:02:32,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:02:32,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-25 20:02:32,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-25 20:02:32,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 58 [2021-11-25 20:02:32,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:32,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:33,019 INFO L354 Elim1Store]: treesize reduction 306, result has 12.3 percent of original size [2021-11-25 20:02:33,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-25 20:02:33,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:33,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:33,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 96 [2021-11-25 20:02:33,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:33,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:33,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 101 [2021-11-25 20:02:33,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:33,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:33,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:02:33,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:02:33,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:02:33,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:02:33,826 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:02:34,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3017#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:02:34,925 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:02:34,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:02:34,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-25 20:02:34,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275589547] [2021-11-25 20:02:34,925 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 20:02:34,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 20:02:34,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 20:02:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1859, Unknown=10, NotChecked=178, Total=2256 [2021-11-25 20:02:34,927 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:36,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:36,104 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-11-25 20:02:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 20:02:36,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-25 20:02:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:36,106 INFO L225 Difference]: With dead ends: 73 [2021-11-25 20:02:36,106 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 20:02:36,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=446, Invalid=3584, Unknown=10, NotChecked=250, Total=4290 [2021-11-25 20:02:36,108 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:36,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 88 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:02:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 20:02:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-11-25 20:02:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-11-25 20:02:36,128 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 36 [2021-11-25 20:02:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:36,129 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-11-25 20:02:36,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-11-25 20:02:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 20:02:36,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:36,131 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:36,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:36,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:02:36,337 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:36,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:36,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1952179635, now seen corresponding path program 8 times [2021-11-25 20:02:36,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:36,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675377643] [2021-11-25 20:02:36,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:36,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 1 proven. 115 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:02:36,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:36,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675377643] [2021-11-25 20:02:36,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675377643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:02:36,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228308433] [2021-11-25 20:02:36,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:02:36,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:36,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:36,899 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:02:36,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:02:37,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 20:02:37,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:02:37,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 20:02:37,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:37,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-11-25 20:02:37,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 [2021-11-25 20:02:37,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 5 [2021-11-25 20:02:37,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 62 [2021-11-25 20:02:37,632 INFO L354 Elim1Store]: treesize reduction 57, result has 20.8 percent of original size [2021-11-25 20:02:37,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2021-11-25 20:02:37,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 5 [2021-11-25 20:02:37,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 62 [2021-11-25 20:02:37,727 INFO L354 Elim1Store]: treesize reduction 57, result has 20.8 percent of original size [2021-11-25 20:02:37,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2021-11-25 20:02:37,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 5 [2021-11-25 20:02:37,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 57 [2021-11-25 20:02:37,841 INFO L354 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2021-11-25 20:02:37,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2021-11-25 20:02:37,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 5 [2021-11-25 20:02:38,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-25 20:02:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:02:38,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:02:39,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:02:39,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2021-11-25 20:02:39,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:39,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2021-11-25 20:02:39,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:39,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 20:02:39,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2021-11-25 20:02:39,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 109 [2021-11-25 20:02:39,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:39,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 503 treesize of output 503 [2021-11-25 20:02:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:02:39,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228308433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:02:39,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235731200] [2021-11-25 20:02:39,663 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:02:39,663 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:02:39,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:02:39,663 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:02:39,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:02:39,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,707 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-25 20:02:39,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-25 20:02:39,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,739 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:02:39,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:02:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-25 20:02:39,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:39,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 64 [2021-11-25 20:02:39,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:39,963 INFO L354 Elim1Store]: treesize reduction 306, result has 12.3 percent of original size [2021-11-25 20:02:39,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-25 20:02:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,080 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-25 20:02:40,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 596 treesize of output 504 [2021-11-25 20:02:40,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:40,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:40,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 598 treesize of output 502 [2021-11-25 20:02:40,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:02:40,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:02:40,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:02:40,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:02:40,770 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:02:41,657 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3555#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:02:41,657 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:02:41,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:02:41,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 43 [2021-11-25 20:02:41,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876157227] [2021-11-25 20:02:41,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:02:41,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 20:02:41,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 20:02:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 20:02:41,659 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:42,956 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2021-11-25 20:02:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-25 20:02:42,956 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-25 20:02:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:42,957 INFO L225 Difference]: With dead ends: 77 [2021-11-25 20:02:42,957 INFO L226 Difference]: Without dead ends: 75 [2021-11-25 20:02:42,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 89 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=532, Invalid=4298, Unknown=0, NotChecked=0, Total=4830 [2021-11-25 20:02:42,960 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:42,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 201 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 471 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2021-11-25 20:02:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-25 20:02:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-11-25 20:02:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-11-25 20:02:42,991 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 39 [2021-11-25 20:02:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:42,991 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-11-25 20:02:42,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-11-25 20:02:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 20:02:42,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:42,993 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:43,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:43,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 20:02:43,197 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash -763369886, now seen corresponding path program 9 times [2021-11-25 20:02:43,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:43,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421723178] [2021-11-25 20:02:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:43,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:02:43,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:43,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421723178] [2021-11-25 20:02:43,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421723178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:02:43,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765865371] [2021-11-25 20:02:43,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:02:43,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:43,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:43,701 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:02:43,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:02:43,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:02:43,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:02:43,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 20:02:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:43,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-11-25 20:02:43,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 [2021-11-25 20:02:44,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 51 [2021-11-25 20:02:44,044 INFO L354 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2021-11-25 20:02:44,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-11-25 20:02:44,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 51 [2021-11-25 20:02:44,150 INFO L354 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2021-11-25 20:02:44,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-11-25 20:02:44,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2021-11-25 20:02:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:02:44,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:02:45,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:02:45,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2021-11-25 20:02:47,222 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_221| Int)) (or (and (forall ((v_ArrVal_749 Int) (v_ArrVal_748 Int)) (let ((.cse0 (select (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) v_ArrVal_748) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (* |v_ULTIMATE.start_main_~j~0#1_221| (- 4))) v_ArrVal_749)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)))) (or (= .cse0 0) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse0)))) (< |v_ULTIMATE.start_main_~j~0#1_221| |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~j~0#1|)) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_221| 1)))) is different from false [2021-11-25 20:02:47,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:47,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2021-11-25 20:02:47,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:47,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 20:02:47,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2021-11-25 20:02:47,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2021-11-25 20:02:47,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:47,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 497 treesize of output 489 [2021-11-25 20:02:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 11 not checked. [2021-11-25 20:02:47,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765865371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:02:47,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [484943232] [2021-11-25 20:02:47,981 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:02:47,981 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:02:47,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:02:47,982 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:02:47,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:02:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,020 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:02:48,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:02:48,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-25 20:02:48,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-25 20:02:48,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:48,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 53 [2021-11-25 20:02:48,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,278 INFO L354 Elim1Store]: treesize reduction 306, result has 12.3 percent of original size [2021-11-25 20:02:48,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-25 20:02:48,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:48,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:48,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:48,423 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-25 20:02:48,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 750 treesize of output 626 [2021-11-25 20:02:48,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:02:48,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:02:48,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:02:48,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:02:48,790 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:02:49,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4132#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:02:49,619 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:02:49,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:02:49,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 45 [2021-11-25 20:02:49,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348529163] [2021-11-25 20:02:49,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:02:49,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-25 20:02:49,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:49,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-25 20:02:49,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2442, Unknown=1, NotChecked=100, Total=2756 [2021-11-25 20:02:49,622 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:51,802 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse5 (* 5 |c_ULTIMATE.start_main_~i~0#1|)) (.cse4 (+ |c_ULTIMATE.start_main_~j~0#1| 8))) (and (<= 3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12 .cse1))) (<= (+ |c_ULTIMATE.start_main_~j~0#1| 1) (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 20) (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) (- 4)))) (forall ((|v_ULTIMATE.start_main_~j~0#1_221| Int)) (or (and (forall ((v_ArrVal_749 Int) (v_ArrVal_748 Int)) (let ((.cse2 (select (let ((.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 20))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse3 (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) v_ArrVal_748) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse3 (* |v_ULTIMATE.start_main_~j~0#1_221| (- 4))) v_ArrVal_749)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)))) (or (= .cse2 0) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse2)))) (< |v_ULTIMATE.start_main_~j~0#1_221| |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~j~0#1|)) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_221| 1)))) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= 2 |c_ULTIMATE.start_main_~j~0#1|) (<= 3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 16 .cse1))) (<= |c_ULTIMATE.start_main_~j~0#1| 2) (<= .cse4 .cse5) (<= .cse5 .cse4))) is different from false [2021-11-25 20:02:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:52,443 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2021-11-25 20:02:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-25 20:02:52,443 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-25 20:02:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:52,444 INFO L225 Difference]: With dead ends: 103 [2021-11-25 20:02:52,444 INFO L226 Difference]: Without dead ends: 101 [2021-11-25 20:02:52,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=348, Invalid=3948, Unknown=2, NotChecked=258, Total=4556 [2021-11-25 20:02:52,447 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:52,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 252 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 658 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2021-11-25 20:02:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-25 20:02:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2021-11-25 20:02:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-11-25 20:02:52,463 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 42 [2021-11-25 20:02:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:52,464 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-11-25 20:02:52,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-11-25 20:02:52,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:02:52,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:52,465 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:52,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:52,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:52,668 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:52,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:52,669 INFO L85 PathProgramCache]: Analyzing trace with hash 304837459, now seen corresponding path program 10 times [2021-11-25 20:02:52,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:52,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544494964] [2021-11-25 20:02:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:52,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 1 proven. 158 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:02:53,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:53,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544494964] [2021-11-25 20:02:53,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544494964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:02:53,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759749393] [2021-11-25 20:02:53,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:02:53,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:53,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:53,175 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:02:53,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:02:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:53,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 20:02:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:53,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 20:02:53,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 46 [2021-11-25 20:02:53,522 INFO L354 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-11-25 20:02:53,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-25 20:02:54,339 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-11-25 20:02:54,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 36 [2021-11-25 20:02:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:02:54,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:02:54,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:02:55,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:55,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 40 [2021-11-25 20:02:55,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:55,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 20:02:55,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-25 20:02:55,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2021-11-25 20:02:55,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2021-11-25 20:02:55,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:55,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 95 [2021-11-25 20:02:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:02:55,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759749393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:02:55,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1224544227] [2021-11-25 20:02:55,431 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:02:55,431 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:02:55,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:02:55,432 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:02:55,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:02:55,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,475 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-25 20:02:55,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-25 20:02:55,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,506 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:02:55,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 20:02:55,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-25 20:02:55,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 62 [2021-11-25 20:02:55,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:02:55,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,749 INFO L354 Elim1Store]: treesize reduction 306, result has 12.3 percent of original size [2021-11-25 20:02:55,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-25 20:02:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:55,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:55,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 598 treesize of output 510 [2021-11-25 20:02:55,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:56,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:56,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:56,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:56,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:56,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:56,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:56,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:56,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:56,019 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-25 20:02:56,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 591 treesize of output 491 [2021-11-25 20:02:56,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:02:56,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:02:56,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 15 [2021-11-25 20:02:56,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 17 [2021-11-25 20:02:56,469 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:02:57,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4762#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:02:57,463 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:02:57,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:02:57,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 53 [2021-11-25 20:02:57,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260334060] [2021-11-25 20:02:57,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:02:57,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-25 20:02:57,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-25 20:02:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3422, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 20:02:57,466 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:02,084 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2021-11-25 20:03:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-25 20:03:02,085 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-25 20:03:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:02,087 INFO L225 Difference]: With dead ends: 153 [2021-11-25 20:03:02,087 INFO L226 Difference]: Without dead ends: 151 [2021-11-25 20:03:02,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 95 SyntacticMatches, 11 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4490 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1093, Invalid=13669, Unknown=0, NotChecked=0, Total=14762 [2021-11-25 20:03:02,090 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 91 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:02,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 344 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1092 Invalid, 0 Unknown, 244 Unchecked, 1.0s Time] [2021-11-25 20:03:02,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-25 20:03:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 100. [2021-11-25 20:03:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 99 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-11-25 20:03:02,130 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 45 [2021-11-25 20:03:02,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:02,131 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-11-25 20:03:02,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-11-25 20:03:02,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 20:03:02,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:02,133 INFO L514 BasicCegarLoop]: trace histogram [20, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:02,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:02,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 20:03:02,349 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1898302707, now seen corresponding path program 11 times [2021-11-25 20:03:02,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:02,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365820469] [2021-11-25 20:03:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:02,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 10 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:03,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365820469] [2021-11-25 20:03:03,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365820469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:03,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693274709] [2021-11-25 20:03:03,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:03:03,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:03,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:03,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:03,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083a86b0-21a7-4266-9b38-dc26461eb1ba/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:03:08,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-25 20:03:08,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:08,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-25 20:03:08,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:08,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 36 [2021-11-25 20:03:08,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 14 [2021-11-25 20:03:08,271 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-25 20:03:08,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-11-25 20:03:08,322 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-25 20:03:08,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-11-25 20:03:08,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 48 [2021-11-25 20:03:08,389 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-25 20:03:08,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-11-25 20:03:08,458 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-25 20:03:08,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-11-25 20:03:08,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 20:03:08,539 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-25 20:03:08,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 20:03:08,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 48 [2021-11-25 20:03:08,623 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-25 20:03:08,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 38 [2021-11-25 20:03:08,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:03:08,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2021-11-25 20:03:08,726 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-25 20:03:08,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:03:08,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:03:08,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 72 [2021-11-25 20:03:08,858 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-25 20:03:08,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 62 [2021-11-25 20:03:08,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:03:08,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 81 [2021-11-25 20:03:08,988 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-25 20:03:08,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 71 [2021-11-25 20:03:09,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:03:09,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 85 [2021-11-25 20:03:09,141 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-25 20:03:09,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 69 [2021-11-25 20:03:09,179 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 20:03:09,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 7 [2021-11-25 20:03:09,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 56 [2021-11-25 20:03:09,483 INFO L354 Elim1Store]: treesize reduction 98, result has 26.3 percent of original size [2021-11-25 20:03:09,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2021-11-25 20:03:09,575 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-25 20:03:09,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2021-11-25 20:03:09,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:03:09,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2021-11-25 20:03:09,727 INFO L354 Elim1Store]: treesize reduction 98, result has 26.3 percent of original size [2021-11-25 20:03:09,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 65 [2021-11-25 20:03:09,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2021-11-25 20:03:09,792 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-25 20:03:09,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2021-11-25 20:03:09,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2021-11-25 20:03:09,970 INFO L354 Elim1Store]: treesize reduction 98, result has 26.3 percent of original size [2021-11-25 20:03:09,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 65 [2021-11-25 20:03:10,020 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-25 20:03:10,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2021-11-25 20:03:10,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:03:10,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2021-11-25 20:03:10,313 INFO L354 Elim1Store]: treesize reduction 98, result has 26.3 percent of original size [2021-11-25 20:03:10,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 65 [2021-11-25 20:03:10,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2021-11-25 20:03:10,413 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-25 20:03:10,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2021-11-25 20:03:10,682 INFO L354 Elim1Store]: treesize reduction 98, result has 26.3 percent of original size [2021-11-25 20:03:10,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 55 [2021-11-25 20:03:11,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-25 20:03:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 29 proven. 282 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:03:11,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:11,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:03:11,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-11-25 20:03:12,061 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-25 20:03:14,597 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-25 20:03:19,376 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-25 20:03:38,896 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-25 20:03:42,830 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-25 20:03:46,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4424990690 treesize of output 4420796386