./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:55:34,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:55:34,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:55:34,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:55:34,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:55:34,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:55:34,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:55:34,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:55:34,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:55:34,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:55:34,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:55:34,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:55:34,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:55:34,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:55:34,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:55:34,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:55:34,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:55:34,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:55:34,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:55:34,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:55:34,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:55:34,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:55:34,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:55:34,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:55:34,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:55:34,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:55:34,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:55:34,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:55:34,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:55:34,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:55:34,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:55:34,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:55:34,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:55:34,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:55:34,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:55:34,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:55:34,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:55:34,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:55:34,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:55:34,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:55:34,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:55:34,141 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:55:34,192 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:55:34,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:55:34,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:55:34,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:55:34,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:55:34,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:55:34,195 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:55:34,195 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:55:34,195 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:55:34,195 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:55:34,196 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:55:34,197 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:55:34,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:55:34,197 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:55:34,197 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:55:34,198 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:55:34,198 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:55:34,198 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:55:34,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:55:34,199 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:55:34,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:55:34,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:55:34,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:55:34,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:55:34,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:55:34,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:55:34,201 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:55:34,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:55:34,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:55:34,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:55:34,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:55:34,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:55:34,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:55:34,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:55:34,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:55:34,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:55:34,203 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:55:34,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:55:34,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:55:34,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:55:34,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:55:34,205 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_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac [2021-11-21 00:55:34,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:55:34,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:55:34,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:55:34,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:55:34,548 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:55:34,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2021-11-21 00:55:34,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/data/59f193281/b016a6f861b54801b90dd611c9c9c20a/FLAGe555b9a65 [2021-11-21 00:55:35,170 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:55:35,170 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2021-11-21 00:55:35,177 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/data/59f193281/b016a6f861b54801b90dd611c9c9c20a/FLAGe555b9a65 [2021-11-21 00:55:35,528 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/data/59f193281/b016a6f861b54801b90dd611c9c9c20a [2021-11-21 00:55:35,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:55:35,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:55:35,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:55:35,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:55:35,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:55:35,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75faa09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35, skipping insertion in model container [2021-11-21 00:55:35,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:55:35,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:55:35,733 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_bc16bf68-2d6e-4d7e-94bc-892254b5e609/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2021-11-21 00:55:35,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:55:35,755 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:55:35,768 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_bc16bf68-2d6e-4d7e-94bc-892254b5e609/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2021-11-21 00:55:35,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:55:35,789 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:55:35,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35 WrapperNode [2021-11-21 00:55:35,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:55:35,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:55:35,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:55:35,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:55:35,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,826 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2021-11-21 00:55:35,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:55:35,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:55:35,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:55:35,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:55:35,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:55:35,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:55:35,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:55:35,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:55:35,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (1/1) ... [2021-11-21 00:55:35,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:55:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:35,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:55:35,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:55:35,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:55:35,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:55:35,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:55:35,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:55:35,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:55:35,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:55:35,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:55:35,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:55:36,043 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:55:36,045 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:55:36,193 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:55:36,231 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:55:36,231 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:55:36,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:55:36 BoogieIcfgContainer [2021-11-21 00:55:36,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:55:36,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:55:36,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:55:36,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:55:36,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:55:35" (1/3) ... [2021-11-21 00:55:36,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b828587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:55:36, skipping insertion in model container [2021-11-21 00:55:36,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:35" (2/3) ... [2021-11-21 00:55:36,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b828587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:55:36, skipping insertion in model container [2021-11-21 00:55:36,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:55:36" (3/3) ... [2021-11-21 00:55:36,242 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr.c [2021-11-21 00:55:36,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:55:36,248 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:55:36,298 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:55:36,305 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 [2021-11-21 00:55:36,305 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:55:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:36,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:55:36,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:36,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:55:36,325 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:36,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1387171958, now seen corresponding path program 1 times [2021-11-21 00:55:36,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:36,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778065935] [2021-11-21 00:55:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:36,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:36,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:36,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778065935] [2021-11-21 00:55:36,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778065935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:55:36,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:55:36,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:55:36,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427907908] [2021-11-21 00:55:36,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:55:36,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:55:36,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:36,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:55:36,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:55:36,584 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:36,666 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2021-11-21 00:55:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:55:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 00:55:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:36,676 INFO L225 Difference]: With dead ends: 17 [2021-11-21 00:55:36,677 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 00:55:36,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:55:36,683 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:36,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:55:36,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 00:55:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 00:55:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-21 00:55:36,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2021-11-21 00:55:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:36,716 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-21 00:55:36,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-21 00:55:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:55:36,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:36,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:36,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:55:36,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:36,719 INFO L85 PathProgramCache]: Analyzing trace with hash -110753083, now seen corresponding path program 1 times [2021-11-21 00:55:36,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:36,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042505041] [2021-11-21 00:55:36,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:36,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:55:36,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:36,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042505041] [2021-11-21 00:55:36,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042505041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:55:36,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:55:36,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:55:36,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662549114] [2021-11-21 00:55:36,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:55:36,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:55:36,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:55:36,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:55:36,806 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:36,837 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-11-21 00:55:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:55:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 00:55:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:36,838 INFO L225 Difference]: With dead ends: 15 [2021-11-21 00:55:36,838 INFO L226 Difference]: Without dead ends: 10 [2021-11-21 00:55:36,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:55:36,840 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:36,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:55:36,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-21 00:55:36,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-21 00:55:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-21 00:55:36,852 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-21 00:55:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:36,853 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-21 00:55:36,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-21 00:55:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:55:36,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:36,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:36,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:55:36,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:36,858 INFO L85 PathProgramCache]: Analyzing trace with hash 849702428, now seen corresponding path program 1 times [2021-11-21 00:55:36,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:36,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811489127] [2021-11-21 00:55:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:36,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:55:36,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811489127] [2021-11-21 00:55:36,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811489127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:55:36,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341021777] [2021-11-21 00:55:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:36,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:36,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:36,964 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:36,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:55:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:37,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:55:37,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:55:37,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:55:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:55:37,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341021777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:55:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424596622] [2021-11-21 00:55:37,240 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:55:37,240 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:55:37,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:55:37,250 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:55:37,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:55:37,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:37,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:37,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:37,491 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-21 00:55:37,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-21 00:55:37,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:37,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:37,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:37,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:37,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:37,788 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 00:55:37,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 00:55:38,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:38,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-21 00:55:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:38,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:38,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:38,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:38,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:38,669 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-21 00:55:38,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 365 treesize of output 363 [2021-11-21 00:55:40,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:40,130 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-21 00:55:40,132 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 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-21 00:55:40,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:40,402 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-21 00:55:40,402 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 21 treesize of output 40 [2021-11-21 00:55:40,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:40,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:40,588 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 00:55:40,588 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 36 treesize of output 55 [2021-11-21 00:55:41,074 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:55:41,280 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:55:41,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:55:41,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-21 00:55:41,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412159675] [2021-11-21 00:55:41,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:55:41,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:55:41,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:55:41,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:55:41,286 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:41,312 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-21 00:55:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:55:41,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:55:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:41,314 INFO L225 Difference]: With dead ends: 20 [2021-11-21 00:55:41,314 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 00:55:41,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:55:41,316 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:41,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:55:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 00:55:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-21 00:55:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-21 00:55:41,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-11-21 00:55:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:41,321 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-21 00:55:41,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-21 00:55:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:55:41,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:41,322 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:41,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:55:41,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:41,526 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:41,527 INFO L85 PathProgramCache]: Analyzing trace with hash 193659703, now seen corresponding path program 2 times [2021-11-21 00:55:41,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:41,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597538404] [2021-11-21 00:55:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:41,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:55:41,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:41,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597538404] [2021-11-21 00:55:41,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597538404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:55:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967816741] [2021-11-21 00:55:41,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:55:41,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:41,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:41,670 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:41,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:55:41,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:55:41,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:55:41,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:55:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:55:41,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:55:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:55:41,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967816741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:55:41,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1273387645] [2021-11-21 00:55:41,851 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:55:41,851 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:55:41,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:55:41,852 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:55:41,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:55:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:41,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:41,982 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-21 00:55:41,983 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 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-21 00:55:42,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:42,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:42,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:42,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:42,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:42,236 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 00:55:42,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 00:55:42,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:42,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:42,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-21 00:55:42,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:42,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:42,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:42,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:42,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:42,798 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-21 00:55:42,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 365 treesize of output 363 [2021-11-21 00:55:44,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:44,182 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-21 00:55:44,182 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 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-21 00:55:44,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:44,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:44,363 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-21 00:55:44,364 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 21 treesize of output 40 [2021-11-21 00:55:44,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:44,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:44,553 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 00:55:44,553 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 36 treesize of output 55 [2021-11-21 00:55:44,979 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:55:45,173 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:55:45,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:55:45,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2021-11-21 00:55:45,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873224842] [2021-11-21 00:55:45,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:55:45,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:55:45,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:45,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:55:45,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:55:45,175 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:45,321 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-11-21 00:55:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:55:45,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 00:55:45,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:45,322 INFO L225 Difference]: With dead ends: 55 [2021-11-21 00:55:45,322 INFO L226 Difference]: Without dead ends: 48 [2021-11-21 00:55:45,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:55:45,324 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:45,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 27 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:55:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-21 00:55:45,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 22. [2021-11-21 00:55:45,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-21 00:55:45,331 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2021-11-21 00:55:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:45,331 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-21 00:55:45,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-21 00:55:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 00:55:45,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:45,333 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:45,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:55:45,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:45,547 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1909590116, now seen corresponding path program 3 times [2021-11-21 00:55:45,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435024113] [2021-11-21 00:55:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:45,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 00:55:45,724 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435024113] [2021-11-21 00:55:45,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435024113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:55:45,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993773138] [2021-11-21 00:55:45,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:55:45,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:45,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:45,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:45,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:55:45,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:55:45,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:55:45,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:55:45,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 00:55:45,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:55:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 00:55:46,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993773138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:55:46,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289581424] [2021-11-21 00:55:46,141 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:55:46,141 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:55:46,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:55:46,142 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:55:46,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:55:46,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:46,281 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 00:55:46,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 00:55:46,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:46,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:46,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:46,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-21 00:55:46,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:46,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:46,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-21 00:55:46,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:46,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:46,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:46,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:46,907 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-21 00:55:46,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 365 treesize of output 363 [2021-11-21 00:55:47,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:47,959 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-21 00:55:47,959 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 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-21 00:55:48,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:48,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:48,078 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-21 00:55:48,079 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 21 treesize of output 40 [2021-11-21 00:55:48,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:48,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:48,344 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 00:55:48,345 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 36 treesize of output 55 [2021-11-21 00:55:48,666 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:55:48,802 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:55:48,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:55:48,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2021-11-21 00:55:48,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197646973] [2021-11-21 00:55:48,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:55:48,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 00:55:48,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 00:55:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:55:48,805 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:49,167 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-11-21 00:55:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 00:55:49,168 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-21 00:55:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:49,172 INFO L225 Difference]: With dead ends: 124 [2021-11-21 00:55:49,172 INFO L226 Difference]: Without dead ends: 111 [2021-11-21 00:55:49,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=607, Invalid=953, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:55:49,175 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 252 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:49,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 60 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:55:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-21 00:55:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 40. [2021-11-21 00:55:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-21 00:55:49,191 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2021-11-21 00:55:49,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:49,191 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-21 00:55:49,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-21 00:55:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 00:55:49,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:49,195 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:49,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:55:49,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:49,423 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash 726013834, now seen corresponding path program 4 times [2021-11-21 00:55:49,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:49,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803978694] [2021-11-21 00:55:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:49,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-21 00:55:49,705 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:49,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803978694] [2021-11-21 00:55:49,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803978694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:55:49,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321157387] [2021-11-21 00:55:49,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:55:49,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:49,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:49,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:49,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:55:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:55:49,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-21 00:55:50,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:55:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-21 00:55:50,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321157387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:55:50,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465965626] [2021-11-21 00:55:50,614 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:55:50,614 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:55:50,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:55:50,615 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:55:50,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:55:50,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,721 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-21 00:55:50,721 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 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-21 00:55:50,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,860 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 00:55:50,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 00:55:50,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:50,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2021-11-21 00:55:51,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:51,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:51,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:51,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:51,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:51,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:51,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:51,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:51,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:51,303 INFO L354 Elim1Store]: treesize reduction 144, result has 12.2 percent of original size [2021-11-21 00:55:51,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 375 treesize of output 361 [2021-11-21 00:55:51,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:51,773 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-21 00:55:51,774 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 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-21 00:55:51,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:51,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:51,927 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 00:55:51,928 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 36 treesize of output 55 [2021-11-21 00:55:52,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:52,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:52,091 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 00:55:52,091 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 36 treesize of output 55 [2021-11-21 00:55:52,463 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:55:52,627 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:55:52,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:55:52,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2021-11-21 00:55:52,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804109794] [2021-11-21 00:55:52,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:55:52,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-21 00:55:52,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-21 00:55:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 00:55:52,631 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:52,742 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-11-21 00:55:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-21 00:55:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-21 00:55:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:52,743 INFO L225 Difference]: With dead ends: 80 [2021-11-21 00:55:52,744 INFO L226 Difference]: Without dead ends: 58 [2021-11-21 00:55:52,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 00:55:52,746 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:52,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:55:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-21 00:55:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-21 00:55:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:52,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-11-21 00:55:52,755 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 38 [2021-11-21 00:55:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:52,756 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-11-21 00:55:52,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-11-21 00:55:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 00:55:52,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:52,758 INFO L514 BasicCegarLoop]: trace histogram [34, 16, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:52,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:55:52,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:52,972 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:52,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1878074902, now seen corresponding path program 5 times [2021-11-21 00:55:52,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:52,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717529149] [2021-11-21 00:55:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:52,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-21 00:55:53,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717529149] [2021-11-21 00:55:53,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717529149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:55:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703153580] [2021-11-21 00:55:53,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:55:53,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:53,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:53,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:53,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:56:01,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-21 00:56:01,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:01,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:56:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-21 00:56:01,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-11-21 00:56:02,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703153580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:02,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173278157] [2021-11-21 00:56:02,283 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:56:02,283 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:56:02,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:56:02,284 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:56:02,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:56:02,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,381 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-21 00:56:02,381 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 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-21 00:56:02,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,553 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 00:56:02,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 00:56:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-21 00:56:02,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:56:02,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:56:02,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:56:02,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:56:03,070 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-21 00:56:03,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 365 treesize of output 363 [2021-11-21 00:56:03,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:56:04,012 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-21 00:56:04,012 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 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-21 00:56:04,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:56:04,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:56:04,208 INFO L354 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2021-11-21 00:56:04,208 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 21 treesize of output 40 [2021-11-21 00:56:04,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:56:04,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:56:04,405 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 00:56:04,405 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 36 treesize of output 55 [2021-11-21 00:56:04,782 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:56:05,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:56:05,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:56:05,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19, 19] total 72 [2021-11-21 00:56:05,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082817309] [2021-11-21 00:56:05,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:05,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-21 00:56:05,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:56:05,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-21 00:56:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2629, Invalid=3223, Unknown=0, NotChecked=0, Total=5852 [2021-11-21 00:56:05,019 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:07,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:07,036 INFO L93 Difference]: Finished difference Result 385 states and 442 transitions. [2021-11-21 00:56:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-21 00:56:07,037 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-21 00:56:07,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:07,039 INFO L225 Difference]: With dead ends: 385 [2021-11-21 00:56:07,040 INFO L226 Difference]: Without dead ends: 363 [2021-11-21 00:56:07,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3881 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4729, Invalid=7703, Unknown=0, NotChecked=0, Total=12432 [2021-11-21 00:56:07,045 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 978 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:07,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 177 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:56:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-21 00:56:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 112. [2021-11-21 00:56:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-11-21 00:56:07,063 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 56 [2021-11-21 00:56:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:07,064 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-11-21 00:56:07,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-11-21 00:56:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-21 00:56:07,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:07,066 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:07,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:07,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:56:07,275 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:07,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:07,275 INFO L85 PathProgramCache]: Analyzing trace with hash -98618998, now seen corresponding path program 6 times [2021-11-21 00:56:07,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:07,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582461659] [2021-11-21 00:56:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:07,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-21 00:56:08,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:56:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582461659] [2021-11-21 00:56:08,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582461659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:56:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666518158] [2021-11-21 00:56:08,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:56:08,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:08,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:08,739 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:08,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:03:38,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:03:38,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:03:38,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-21 01:03:38,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:03:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-21 01:03:40,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:03:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-21 01:03:43,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666518158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:03:43,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94064406] [2021-11-21 01:03:43,511 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:03:43,511 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:03:43,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:03:43,512 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:03:43,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:03:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:43,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:43,632 INFO L354 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2021-11-21 01:03:43,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2021-11-21 01:03:43,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:43,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:43,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:43,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:43,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:43,815 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:03:43,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:03:43,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:43,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:43,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2021-11-21 01:03:44,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:44,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:44,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:44,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:44,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:44,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:03:44,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:44,261 INFO L354 Elim1Store]: treesize reduction 144, result has 12.2 percent of original size [2021-11-21 01:03:44,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 375 treesize of output 361 [2021-11-21 01:03:44,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:44,785 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-21 01:03:44,785 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 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-21 01:03:44,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:44,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:44,963 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:03:44,963 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 36 treesize of output 55 [2021-11-21 01:03:45,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:45,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:03:45,146 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:03:45,146 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 36 treesize of output 55 [2021-11-21 01:03:45,531 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:03:45,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:03:45,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:03:45,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 162 [2021-11-21 01:03:45,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099123283] [2021-11-21 01:03:45,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:03:45,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-11-21 01:03:45,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-11-21 01:03:45,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12160, Invalid=15562, Unknown=0, NotChecked=0, Total=27722 [2021-11-21 01:03:45,703 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:03:53,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:53,191 INFO L93 Difference]: Finished difference Result 799 states and 910 transitions. [2021-11-21 01:03:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-21 01:03:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-21 01:03:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:53,196 INFO L225 Difference]: With dead ends: 799 [2021-11-21 01:03:53,196 INFO L226 Difference]: Without dead ends: 741 [2021-11-21 01:03:53,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18434 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=18202, Invalid=29978, Unknown=0, NotChecked=0, Total=48180 [2021-11-21 01:03:53,204 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2154 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2154 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1386 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:53,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2154 Valid, 408 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1386 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:03:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-11-21 01:03:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 220. [2021-11-21 01:03:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:03:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2021-11-21 01:03:53,237 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 110 [2021-11-21 01:03:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:53,237 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2021-11-21 01:03:53,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:03:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2021-11-21 01:03:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-21 01:03:53,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:53,242 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1] [2021-11-21 01:03:53,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:03:53,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:03:53,459 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:03:53,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:53,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1978675062, now seen corresponding path program 7 times [2021-11-21 01:03:53,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:53,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023302281] [2021-11-21 01:03:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:53,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-21 01:03:58,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:58,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023302281] [2021-11-21 01:03:58,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023302281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:03:58,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667524899] [2021-11-21 01:03:58,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:03:58,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:03:58,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:03:58,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:03:58,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:03:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-21 01:03:58,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-21 01:04:04,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-21 01:04:18,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667524899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:18,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562671006] [2021-11-21 01:04:18,456 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:04:18,456 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:04:18,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:04:18,457 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:04:18,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:04:18,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:18,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:18,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:18,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:18,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:18,603 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-21 01:04:18,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-21 01:04:18,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:18,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:18,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:18,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 16 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2021-11-21 01:04:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:18,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:18,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 36 [2021-11-21 01:04:19,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:19,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:19,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:19,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:19,182 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-21 01:04:19,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 365 treesize of output 363 [2021-11-21 01:04:20,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:20,577 INFO L354 Elim1Store]: treesize reduction 19, result has 45.7 percent of original size [2021-11-21 01:04:20,577 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 1 case distinctions, treesize of input 43 treesize of output 30 [2021-11-21 01:04:20,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:20,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:20,701 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:04:20,701 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 36 treesize of output 55 [2021-11-21 01:04:20,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:20,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:20,902 INFO L354 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2021-11-21 01:04:20,902 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 36 treesize of output 55 [2021-11-21 01:04:21,253 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:04:21,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:04:21,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:04:21,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 322 [2021-11-21 01:04:21,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209474934] [2021-11-21 01:04:21,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:21,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 323 states [2021-11-21 01:04:21,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:04:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 323 interpolants. [2021-11-21 01:04:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47409, Invalid=59193, Unknown=0, NotChecked=0, Total=106602 [2021-11-21 01:04:21,487 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:04:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:22,395 INFO L93 Difference]: Finished difference Result 440 states and 551 transitions. [2021-11-21 01:04:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-11-21 01:04:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-11-21 01:04:22,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:22,399 INFO L225 Difference]: With dead ends: 440 [2021-11-21 01:04:22,399 INFO L226 Difference]: Without dead ends: 328 [2021-11-21 01:04:22,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47918 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=47409, Invalid=59193, Unknown=0, NotChecked=0, Total=106602 [2021-11-21 01:04:22,405 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:22,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:04:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-21 01:04:22,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2021-11-21 01:04:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0091743119266054) internal successors, (330), 327 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:04:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2021-11-21 01:04:22,443 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 218 [2021-11-21 01:04:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:22,444 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2021-11-21 01:04:22,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:04:22,445 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2021-11-21 01:04:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-21 01:04:22,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:22,452 INFO L514 BasicCegarLoop]: trace histogram [214, 106, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:22,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:22,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:22,667 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:22,667 INFO L85 PathProgramCache]: Analyzing trace with hash 835196618, now seen corresponding path program 8 times [2021-11-21 01:04:22,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:04:22,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387393234] [2021-11-21 01:04:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:22,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:04:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 28676 backedges. 0 proven. 23005 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2021-11-21 01:04:42,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:04:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387393234] [2021-11-21 01:04:42,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387393234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:04:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273529101] [2021-11-21 01:04:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:04:42,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:42,355 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:42,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc16bf68-2d6e-4d7e-94bc-892254b5e609/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process