./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array21_pattern.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_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/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_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array21_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/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_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/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 f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:31:43,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:31:43,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:31:44,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:31:44,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:31:44,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:31:44,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:31:44,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:31:44,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:31:44,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:31:44,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:31:44,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:31:44,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:31:44,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:31:44,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:31:44,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:31:44,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:31:44,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:31:44,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:31:44,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:31:44,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:31:44,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:31:44,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:31:44,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:31:44,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:31:44,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:31:44,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:31:44,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:31:44,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:31:44,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:31:44,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:31:44,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:31:44,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:31:44,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:31:44,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:31:44,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:31:44,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:31:44,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:31:44,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:31:44,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:31:44,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:31:44,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:31:44,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:31:44,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:31:44,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:31:44,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:31:44,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:31:44,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:31:44,162 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:31:44,162 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:31:44,162 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:31:44,162 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:31:44,164 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:31:44,164 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:31:44,164 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:31:44,165 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:31:44,165 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:31:44,165 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:31:44,166 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:31:44,166 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:31:44,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:31:44,167 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:31:44,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:31:44,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:31:44,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:31:44,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:31:44,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:31:44,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:31:44,169 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:31:44,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:31:44,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:31:44,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:31:44,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:31:44,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:31:44,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:31:44,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:31:44,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:31:44,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:31:44,173 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:31:44,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:31:44,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:31:44,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:31:44,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:31:44,174 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_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 [2021-11-21 01:31:44,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:31:44,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:31:44,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:31:44,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:31:44,516 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:31:44,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array21_pattern.c [2021-11-21 01:31:44,584 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/data/7f40bcadc/02dad3f1155b4b4cb9e8fc728308c99f/FLAG811381907 [2021-11-21 01:31:45,069 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:31:45,070 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/sv-benchmarks/c/array-patterns/array21_pattern.c [2021-11-21 01:31:45,076 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/data/7f40bcadc/02dad3f1155b4b4cb9e8fc728308c99f/FLAG811381907 [2021-11-21 01:31:45,453 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/data/7f40bcadc/02dad3f1155b4b4cb9e8fc728308c99f [2021-11-21 01:31:45,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:31:45,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:31:45,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:31:45,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:31:45,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:31:45,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194dac14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45, skipping insertion in model container [2021-11-21 01:31:45,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:31:45,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:31:45,670 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_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2021-11-21 01:31:45,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:31:45,701 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:31:45,715 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_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2021-11-21 01:31:45,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:31:45,742 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:31:45,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45 WrapperNode [2021-11-21 01:31:45,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:31:45,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:31:45,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:31:45,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:31:45,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,784 INFO L137 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2021-11-21 01:31:45,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:31:45,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:31:45,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:31:45,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:31:45,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:31:45,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:31:45,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:31:45,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:31:45,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (1/1) ... [2021-11-21 01:31:45,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:31:45,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:45,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:31:45,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:31:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2021-11-21 01:31:45,942 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2021-11-21 01:31:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:31:45,942 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:31:45,943 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:31:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:31:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:31:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:31:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:31:45,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:31:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:31:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:31:46,014 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:31:46,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:31:46,189 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:31:46,248 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:31:46,249 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-21 01:31:46,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:31:46 BoogieIcfgContainer [2021-11-21 01:31:46,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:31:46,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:31:46,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:31:46,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:31:46,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:31:45" (1/3) ... [2021-11-21 01:31:46,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec6fc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:31:46, skipping insertion in model container [2021-11-21 01:31:46,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:31:45" (2/3) ... [2021-11-21 01:31:46,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec6fc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:31:46, skipping insertion in model container [2021-11-21 01:31:46,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:31:46" (3/3) ... [2021-11-21 01:31:46,260 INFO L111 eAbstractionObserver]: Analyzing ICFG array21_pattern.c [2021-11-21 01:31:46,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:31:46,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:31:46,314 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:31:46,321 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 01:31:46,321 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:31:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:31:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:31:46,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:46,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:46,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:46,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash -445405455, now seen corresponding path program 1 times [2021-11-21 01:31:46,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:46,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43428596] [2021-11-21 01:31:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:46,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:46,470 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:31:46,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887213539] [2021-11-21 01:31:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:46,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:46,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:46,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:46,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:31:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:46,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:31:46,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:46,607 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 01:31:46,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:31:46,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:46,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43428596] [2021-11-21 01:31:46,609 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:31:46,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887213539] [2021-11-21 01:31:46,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887213539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:31:46,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:31:46,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:31:46,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592264630] [2021-11-21 01:31:46,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:31:46,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:31:46,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:31:46,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:31:46,655 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:31:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:46,697 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-11-21 01:31:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:31:46,699 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-21 01:31:46,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:46,707 INFO L225 Difference]: With dead ends: 35 [2021-11-21 01:31:46,707 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 01:31:46,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:31:46,714 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:46,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:31:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 01:31:46,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-21 01:31:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:31:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-11-21 01:31:46,771 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 11 [2021-11-21 01:31:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:46,773 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-11-21 01:31:46,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:31:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-11-21 01:31:46,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:31:46,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:46,775 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:46,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:31:47,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 01:31:47,001 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:47,002 INFO L85 PathProgramCache]: Analyzing trace with hash -369278382, now seen corresponding path program 1 times [2021-11-21 01:31:47,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:47,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885757387] [2021-11-21 01:31:47,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:47,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:47,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:31:47,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361926145] [2021-11-21 01:31:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:47,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:47,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:47,031 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:47,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:31:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:31:47,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:31:47,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:31:47,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:47,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885757387] [2021-11-21 01:31:47,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:31:47,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361926145] [2021-11-21 01:31:47,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361926145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:31:47,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:31:47,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:31:47,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607941962] [2021-11-21 01:31:47,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:31:47,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:31:47,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:31:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:31:47,306 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:31:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:47,456 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2021-11-21 01:31:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:31:47,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2021-11-21 01:31:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:47,458 INFO L225 Difference]: With dead ends: 51 [2021-11-21 01:31:47,458 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 01:31:47,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:31:47,461 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:47,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 41 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:31:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 01:31:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-21 01:31:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:31:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-21 01:31:47,474 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 24 [2021-11-21 01:31:47,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:47,474 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-21 01:31:47,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:31:47,475 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-21 01:31:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:31:47,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:47,477 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:47,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:31:47,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:47,701 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:47,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2038583436, now seen corresponding path program 1 times [2021-11-21 01:31:47,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:47,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023474079] [2021-11-21 01:31:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:47,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:47,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:31:47,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425113652] [2021-11-21 01:31:47,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:47,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:47,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:47,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:47,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:31:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:31:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:31:47,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:31:47,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:47,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023474079] [2021-11-21 01:31:47,878 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:31:47,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425113652] [2021-11-21 01:31:47,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425113652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:31:47,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:31:47,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:31:47,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998817497] [2021-11-21 01:31:47,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:31:47,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:31:47,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:31:47,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:31:47,881 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:31:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:31:47,936 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2021-11-21 01:31:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:31:47,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-11-21 01:31:47,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:31:47,938 INFO L225 Difference]: With dead ends: 54 [2021-11-21 01:31:47,939 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 01:31:47,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:31:47,942 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:31:47,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 47 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:31:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 01:31:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-21 01:31:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:31:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-21 01:31:47,964 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2021-11-21 01:31:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:31:47,965 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-21 01:31:47,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:31:47,966 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-21 01:31:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 01:31:47,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:31:47,969 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:31:48,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:31:48,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 01:31:48,189 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:31:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:31:48,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1737391081, now seen corresponding path program 1 times [2021-11-21 01:31:48,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:31:48,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787867113] [2021-11-21 01:31:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:48,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:31:48,200 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:31:48,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856233861] [2021-11-21 01:31:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:31:48,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:31:48,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:31:48,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:31:48,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:31:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:31:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:31:48,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:31:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:31:48,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:31:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:31:48,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:31:48,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787867113] [2021-11-21 01:31:48,593 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:31:48,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856233861] [2021-11-21 01:31:48,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856233861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:31:48,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1936804483] [2021-11-21 01:31:48,615 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:31:48,615 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:31:48,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:31:48,635 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:31:48,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:31:49,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,141 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:31:49,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:31:49,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 01:31:49,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2021-11-21 01:31:49,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:49,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-21 01:31:49,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 21 [2021-11-21 01:31:49,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:49,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:49,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:49,941 INFO L354 Elim1Store]: treesize reduction 224, result has 23.5 percent of original size [2021-11-21 01:31:49,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 328 [2021-11-21 01:31:50,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 41 [2021-11-21 01:31:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:50,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:31:50,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 38 [2021-11-21 01:31:52,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:52,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:31:52,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:52,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:52,803 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 01:31:52,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 168 [2021-11-21 01:31:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:52,936 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:31:52,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 102 [2021-11-21 01:31:53,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:31:53,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:53,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:53,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:31:53,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:53,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:31:53,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:53,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:53,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:31:53,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:53,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 01:31:53,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:31:53,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:55,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 01:31:55,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:58,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:31:58,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:58,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:31:58,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:31:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 41 [2021-11-21 01:31:58,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:31:58,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:31:58,594 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 17 for LOIs [2021-11-21 01:31:58,621 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2021-11-21 01:31:58,651 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:31:59,912 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:31:59,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:31:59,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 01:31:59,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434105855] [2021-11-21 01:31:59,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:31:59,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:31:59,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:31:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:31:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:31:59,915 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:32:00,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:00,008 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-11-21 01:32:00,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:32:00,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 30 [2021-11-21 01:32:00,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:00,011 INFO L225 Difference]: With dead ends: 58 [2021-11-21 01:32:00,011 INFO L226 Difference]: Without dead ends: 33 [2021-11-21 01:32:00,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:32:00,013 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:00,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:32:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-21 01:32:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-21 01:32:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:32:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-21 01:32:00,020 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2021-11-21 01:32:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:00,021 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-21 01:32:00,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:32:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-21 01:32:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:32:00,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:00,023 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:00,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:00,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:00,233 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash 737507988, now seen corresponding path program 2 times [2021-11-21 01:32:00,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:00,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3003835] [2021-11-21 01:32:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:00,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:00,258 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:00,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488608476] [2021-11-21 01:32:00,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:32:00,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:00,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:00,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:00,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:32:00,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:32:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:32:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:32:00,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:32:00,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:32:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:32:00,757 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:00,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3003835] [2021-11-21 01:32:00,757 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:32:00,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488608476] [2021-11-21 01:32:00,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488608476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:32:00,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748476669] [2021-11-21 01:32:00,762 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:32:00,762 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:32:00,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:32:00,768 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:32:00,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:32:01,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,105 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 01:32:01,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 01:32:01,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-21 01:32:01,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:01,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-11-21 01:32:01,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,360 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:32:01,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:32:01,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:01,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 96 [2021-11-21 01:32:01,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 10 [2021-11-21 01:32:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:32:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:01,985 INFO L354 Elim1Store]: treesize reduction 122, result has 10.9 percent of original size [2021-11-21 01:32:01,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 284 treesize of output 316 [2021-11-21 01:32:02,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 42 [2021-11-21 01:32:02,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:02,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 42 [2021-11-21 01:32:03,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:03,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:32:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:03,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:03,701 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 01:32:03,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 168 [2021-11-21 01:32:03,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:04,055 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:32:04,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 154 [2021-11-21 01:32:04,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:04,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:32:04,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:32:04,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:04,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:32:04,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:04,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:04,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:04,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:32:04,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:04,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:04,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 41 [2021-11-21 01:32:04,779 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:04,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:32:06,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 01:32:08,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:08,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:32:08,832 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:32:08,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:32:08,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:08,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:32:08,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 105 [2021-11-21 01:32:09,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:32:09,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:32:09,186 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 17 for LOIs [2021-11-21 01:32:09,203 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 18 for LOIs [2021-11-21 01:32:09,237 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:32:10,584 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:32:10,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:32:10,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-11-21 01:32:10,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144028257] [2021-11-21 01:32:10,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:32:10,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:32:10,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:10,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:32:10,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:32:10,586 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:32:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:10,819 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-11-21 01:32:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:32:10,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 32 [2021-11-21 01:32:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:10,821 INFO L225 Difference]: With dead ends: 70 [2021-11-21 01:32:10,821 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 01:32:10,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 01:32:10,823 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:10,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 70 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:32:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 01:32:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-11-21 01:32:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:32:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-11-21 01:32:10,831 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 32 [2021-11-21 01:32:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:10,832 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-11-21 01:32:10,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:32:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-11-21 01:32:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 01:32:10,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:10,834 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:10,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:32:11,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:11,049 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash -68836906, now seen corresponding path program 3 times [2021-11-21 01:32:11,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:11,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195320132] [2021-11-21 01:32:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:11,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:11,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:32:11,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594801589] [2021-11-21 01:32:11,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:32:11,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:11,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:11,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:11,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:32:11,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:32:11,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:32:11,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-21 01:32:11,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:32:11,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:32:11,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:32:11,509 INFO L354 Elim1Store]: treesize reduction 132, result has 21.0 percent of original size [2021-11-21 01:32:11,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 91 [2021-11-21 01:32:11,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:11,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-11-21 01:32:11,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:11,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 24 [2021-11-21 01:32:11,804 INFO L354 Elim1Store]: treesize reduction 319, result has 19.8 percent of original size [2021-11-21 01:32:11,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 136 [2021-11-21 01:32:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:11,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:11,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:11,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 43 [2021-11-21 01:32:11,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:11,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:11,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:11,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2021-11-21 01:32:12,124 INFO L354 Elim1Store]: treesize reduction 723, result has 16.5 percent of original size [2021-11-21 01:32:12,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 179 treesize of output 227 [2021-11-21 01:32:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 78 [2021-11-21 01:32:12,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:32:12,355 INFO L354 Elim1Store]: treesize reduction 57, result has 1.7 percent of original size [2021-11-21 01:32:12,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 203 treesize of output 84 [2021-11-21 01:32:22,114 INFO L354 Elim1Store]: treesize reduction 403, result has 31.7 percent of original size [2021-11-21 01:32:22,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 115 treesize of output 268 [2021-11-21 01:32:23,620 INFO L354 Elim1Store]: treesize reduction 905, result has 3.6 percent of original size [2021-11-21 01:32:23,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 311 [2021-11-21 01:32:56,207 INFO L354 Elim1Store]: treesize reduction 1077, result has 1.8 percent of original size [2021-11-21 01:32:56,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 329 treesize of output 128 [2021-11-21 01:32:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:32:56,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:13,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:13,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195320132] [2021-11-21 01:33:13,586 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:13,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594801589] [2021-11-21 01:33:13,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594801589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:13,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [993581626] [2021-11-21 01:33:13,589 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:33:13,589 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:13,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:13,590 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:13,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:13,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:13,899 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 01:33:13,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 01:33:13,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:14,019 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-21 01:33:14,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-11-21 01:33:14,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-21 01:33:14,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-21 01:33:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:14,233 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:33:14,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:33:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:14,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:14,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 92 [2021-11-21 01:33:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:14,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 17 [2021-11-21 01:33:14,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:14,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:14,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:14,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:14,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:14,976 INFO L354 Elim1Store]: treesize reduction 120, result has 11.1 percent of original size [2021-11-21 01:33:14,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 312 [2021-11-21 01:33:15,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:15,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:15,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:15,744 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 01:33:15,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 349 treesize of output 277 [2021-11-21 01:33:16,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:16,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:16,725 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-11-21 01:33:16,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 160 [2021-11-21 01:33:16,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:16,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:16,797 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-21 01:33:16,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 98 [2021-11-21 01:33:17,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:17,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:17,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:17,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:17,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:17,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:17,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:33:17,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:17,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:17,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 41 [2021-11-21 01:33:17,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:17,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:17,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:17,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:33:17,804 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:33:17,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:33:17,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:17,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:17,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 113 [2021-11-21 01:33:18,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:18,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:19,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 01:33:19,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:21,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:33:21,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:22,046 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:33:22,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:33:22,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:22,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:22,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:22,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 105 [2021-11-21 01:33:22,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:22,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:22,512 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:33:22,533 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2021-11-21 01:33:22,566 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:26,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:26,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:33:26,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-21 01:33:26,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687570516] [2021-11-21 01:33:26,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:26,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-21 01:33:26,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-21 01:33:26,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3558, Unknown=18, NotChecked=0, Total=3906 [2021-11-21 01:33:26,575 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:33:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:27,452 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2021-11-21 01:33:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-21 01:33:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2021-11-21 01:33:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:27,456 INFO L225 Difference]: With dead ends: 94 [2021-11-21 01:33:27,456 INFO L226 Difference]: Without dead ends: 91 [2021-11-21 01:33:27,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 57.1s TimeCoverageRelationStatistics Valid=351, Invalid=3791, Unknown=18, NotChecked=0, Total=4160 [2021-11-21 01:33:27,459 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:27,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 269 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 273 Invalid, 0 Unknown, 374 Unchecked, 0.6s Time] [2021-11-21 01:33:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-21 01:33:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-11-21 01:33:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 01:33:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-11-21 01:33:27,476 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 40 [2021-11-21 01:33:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:27,476 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-11-21 01:33:27,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:33:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-11-21 01:33:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:33:27,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:27,478 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:27,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:27,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:27,705 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1075120508, now seen corresponding path program 4 times [2021-11-21 01:33:27,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:27,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519633541] [2021-11-21 01:33:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:27,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:27,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:27,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503341180] [2021-11-21 01:33:27,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:33:27,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:27,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:27,718 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:27,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:33:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:27,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:33:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:33:27,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 01:33:28,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:28,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519633541] [2021-11-21 01:33:28,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503341180] [2021-11-21 01:33:28,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503341180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1185233679] [2021-11-21 01:33:28,082 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:33:28,083 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:28,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:28,083 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:28,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:28,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:28,351 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:33:28,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:33:28,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:28,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:28,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 01:33:28,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:28,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:28,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-21 01:33:28,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:28,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:28,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 84 [2021-11-21 01:33:28,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:28,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2021-11-21 01:33:29,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:29,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:29,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:29,127 INFO L354 Elim1Store]: treesize reduction 228, result has 22.2 percent of original size [2021-11-21 01:33:29,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 278 treesize of output 328 [2021-11-21 01:33:29,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:29,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:29,591 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-11-21 01:33:29,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 232 treesize of output 189 [2021-11-21 01:33:30,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:30,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:31,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:31,055 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 01:33:31,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 168 [2021-11-21 01:33:31,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:31,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 21 [2021-11-21 01:33:31,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:31,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:31,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 18 [2021-11-21 01:33:31,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:31,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:31,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:31,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:33:32,039 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:33:32,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:33:32,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2021-11-21 01:33:32,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:32,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-11-21 01:33:32,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:32,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:32,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:32,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:33:32,689 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:33:32,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:33:32,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:32,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2021-11-21 01:33:32,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:32,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:34,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:34,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 01:33:36,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:36,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:36,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:33:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:36,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 01:33:36,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:36,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:37,062 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:33:37,081 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2021-11-21 01:33:37,114 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:38,621 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:38,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:33:38,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 01:33:38,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194557150] [2021-11-21 01:33:38,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:38,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:33:38,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:38,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:33:38,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:33:38,624 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:33:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:38,936 INFO L93 Difference]: Finished difference Result 214 states and 274 transitions. [2021-11-21 01:33:38,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:33:38,937 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2021-11-21 01:33:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:38,940 INFO L225 Difference]: With dead ends: 214 [2021-11-21 01:33:38,940 INFO L226 Difference]: Without dead ends: 158 [2021-11-21 01:33:38,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:33:38,942 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:38,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 103 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:33:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-21 01:33:38,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 121. [2021-11-21 01:33:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 94 states have internal predecessors, (119), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-21 01:33:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2021-11-21 01:33:38,969 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 41 [2021-11-21 01:33:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:38,969 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2021-11-21 01:33:38,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:33:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2021-11-21 01:33:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:33:38,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:38,972 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:38,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:39,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:39,177 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:39,177 INFO L85 PathProgramCache]: Analyzing trace with hash 705951226, now seen corresponding path program 1 times [2021-11-21 01:33:39,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:39,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579968027] [2021-11-21 01:33:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:39,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:39,184 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:39,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157139434] [2021-11-21 01:33:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:39,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:39,186 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:39,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:33:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:33:39,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 01:33:39,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 01:33:39,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:39,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579968027] [2021-11-21 01:33:39,930 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:39,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157139434] [2021-11-21 01:33:39,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157139434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:39,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475847260] [2021-11-21 01:33:39,932 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-21 01:33:39,933 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:39,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:39,933 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:39,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:40,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:40,155 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:33:40,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:33:40,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:40,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 01:33:40,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:40,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-11-21 01:33:40,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:40,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:40,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-21 01:33:40,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:40,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:40,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 17 [2021-11-21 01:33:40,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:40,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:40,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:40,988 INFO L354 Elim1Store]: treesize reduction 248, result has 19.7 percent of original size [2021-11-21 01:33:40,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 324 [2021-11-21 01:33:41,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:41,497 INFO L354 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2021-11-21 01:33:41,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 35 [2021-11-21 01:33:42,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:42,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:42,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:42,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:42,670 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 01:33:42,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 168 [2021-11-21 01:33:42,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:42,710 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:33:42,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 102 [2021-11-21 01:33:43,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:43,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:43,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:43,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:43,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:43,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:33:43,537 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:33:43,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:33:43,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:43,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2021-11-21 01:33:43,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:43,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:45,552 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 01:33:45,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 173 [2021-11-21 01:33:45,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:45,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 60 [2021-11-21 01:33:47,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:47,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:47,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:33:47,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 41 [2021-11-21 01:33:48,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:48,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:48,148 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 17 for LOIs [2021-11-21 01:33:48,171 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 21 for LOIs [2021-11-21 01:33:48,208 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:49,944 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:49,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:33:49,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-11-21 01:33:49,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488238860] [2021-11-21 01:33:49,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:49,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:33:49,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:33:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1727, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 01:33:49,946 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 21 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 17 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-21 01:33:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:50,674 INFO L93 Difference]: Finished difference Result 163 states and 193 transitions. [2021-11-21 01:33:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:33:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 17 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 44 [2021-11-21 01:33:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:50,676 INFO L225 Difference]: With dead ends: 163 [2021-11-21 01:33:50,677 INFO L226 Difference]: Without dead ends: 136 [2021-11-21 01:33:50,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=307, Invalid=2773, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:33:50,679 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:50,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 172 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:33:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-21 01:33:50,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 119. [2021-11-21 01:33:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-21 01:33:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 144 transitions. [2021-11-21 01:33:50,702 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 144 transitions. Word has length 44 [2021-11-21 01:33:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:50,703 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 144 transitions. [2021-11-21 01:33:50,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 17 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-21 01:33:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 144 transitions. [2021-11-21 01:33:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 01:33:50,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:50,705 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:50,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:50,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:33:50,921 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1442513892, now seen corresponding path program 5 times [2021-11-21 01:33:50,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:50,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462892468] [2021-11-21 01:33:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:50,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:50,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:33:50,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097013793] [2021-11-21 01:33:50,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:50,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:50,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:50,930 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:50,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:33:50,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:33:50,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:50,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:33:50,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:33:51,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:33:51,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462892468] [2021-11-21 01:33:51,205 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:33:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097013793] [2021-11-21 01:33:51,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097013793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355979759] [2021-11-21 01:33:51,207 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:33:51,207 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:51,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:51,208 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:51,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:51,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:51,517 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 01:33:51,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 01:33:51,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:51,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:51,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-11-21 01:33:51,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:51,887 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:33:51,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:33:52,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:52,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 96 [2021-11-21 01:33:52,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 14 [2021-11-21 01:33:52,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:52,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,564 INFO L354 Elim1Store]: treesize reduction 130, result has 10.3 percent of original size [2021-11-21 01:33:52,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 284 treesize of output 320 [2021-11-21 01:33:52,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 42 [2021-11-21 01:33:52,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:52,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 39 [2021-11-21 01:33:53,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:53,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:54,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:54,427 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-11-21 01:33:54,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 160 [2021-11-21 01:33:54,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:54,476 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-21 01:33:54,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:33:54,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:54,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:33:54,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:55,038 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:33:55,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:33:55,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2021-11-21 01:33:55,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:55,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 19 [2021-11-21 01:33:55,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:55,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:55,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:33:55,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:55,716 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:33:55,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:33:55,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2021-11-21 01:33:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:55,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 19 [2021-11-21 01:33:55,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:55,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:33:57,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 01:33:57,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:59,728 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:33:59,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:33:59,885 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:33:59,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:33:59,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:00,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:00,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 113 [2021-11-21 01:34:00,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:00,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:00,308 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:34:00,329 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 18 for LOIs [2021-11-21 01:34:00,381 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:01,911 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:01,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:34:01,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 01:34:01,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569264673] [2021-11-21 01:34:01,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:01,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:34:01,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:34:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:34:01,913 INFO L87 Difference]: Start difference. First operand 119 states and 144 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:34:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:02,217 INFO L93 Difference]: Finished difference Result 171 states and 200 transitions. [2021-11-21 01:34:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:34:02,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-11-21 01:34:02,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:02,219 INFO L225 Difference]: With dead ends: 171 [2021-11-21 01:34:02,220 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:34:02,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:34:02,221 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:02,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 114 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:34:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:34:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-11-21 01:34:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 85 states have internal predecessors, (100), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-21 01:34:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2021-11-21 01:34:02,243 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 43 [2021-11-21 01:34:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:02,243 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2021-11-21 01:34:02,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:34:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2021-11-21 01:34:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:34:02,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:02,245 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:02,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:02,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:02,480 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash -677900810, now seen corresponding path program 6 times [2021-11-21 01:34:02,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:02,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520162270] [2021-11-21 01:34:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:02,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:02,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:02,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907437154] [2021-11-21 01:34:02,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:34:02,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:02,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:02,491 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:02,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:34:02,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:34:02,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:02,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:34:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 01:34:02,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:34:02,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:02,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520162270] [2021-11-21 01:34:02,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:02,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907437154] [2021-11-21 01:34:02,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907437154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:02,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [494551606] [2021-11-21 01:34:02,849 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:34:02,849 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:02,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:02,850 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:02,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:03,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,124 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 01:34:03,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 01:34:03,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:03,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-11-21 01:34:03,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,421 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:34:03,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:34:03,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:03,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-21 01:34:03,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 17 [2021-11-21 01:34:03,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:03,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:03,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:04,098 INFO L354 Elim1Store]: treesize reduction 224, result has 23.5 percent of original size [2021-11-21 01:34:04,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 328 [2021-11-21 01:34:05,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:05,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:05,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:05,388 INFO L354 Elim1Store]: treesize reduction 60, result has 4.8 percent of original size [2021-11-21 01:34:05,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 254 treesize of output 189 [2021-11-21 01:34:06,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:06,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:06,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:06,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:06,490 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 01:34:06,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 168 [2021-11-21 01:34:06,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:06,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:06,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:06,963 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:34:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 154 [2021-11-21 01:34:07,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:07,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:07,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:07,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:07,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:07,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:34:07,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:07,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:07,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 41 [2021-11-21 01:34:07,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:07,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:07,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:07,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:08,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:08,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:08,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:34:08,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:08,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 01:34:08,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:08,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:09,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 01:34:09,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:12,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:12,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:12,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:12,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:12,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:34:12,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:12,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 01:34:12,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:12,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:12,551 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:34:12,573 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2021-11-21 01:34:12,613 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:14,162 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:14,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:34:14,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 01:34:14,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527901629] [2021-11-21 01:34:14,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:14,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:34:14,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:14,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:34:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:34:14,165 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:34:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:14,558 INFO L93 Difference]: Finished difference Result 185 states and 215 transitions. [2021-11-21 01:34:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:34:14,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-11-21 01:34:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:14,561 INFO L225 Difference]: With dead ends: 185 [2021-11-21 01:34:14,561 INFO L226 Difference]: Without dead ends: 182 [2021-11-21 01:34:14,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:34:14,563 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 73 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:14,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 138 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:34:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-21 01:34:14,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 142. [2021-11-21 01:34:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 106 states have internal predecessors, (125), 21 states have call successors, (21), 15 states have call predecessors, (21), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-21 01:34:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 167 transitions. [2021-11-21 01:34:14,591 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 167 transitions. Word has length 44 [2021-11-21 01:34:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:14,592 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 167 transitions. [2021-11-21 01:34:14,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:34:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 167 transitions. [2021-11-21 01:34:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:34:14,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:14,594 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:14,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:14,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:34:14,801 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:14,801 INFO L85 PathProgramCache]: Analyzing trace with hash 671013880, now seen corresponding path program 7 times [2021-11-21 01:34:14,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:14,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736518438] [2021-11-21 01:34:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:14,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:14,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:14,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020646877] [2021-11-21 01:34:14,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:34:14,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:14,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:14,820 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:14,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:34:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:14,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:34:14,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:34:15,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:34:15,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:15,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736518438] [2021-11-21 01:34:15,161 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:15,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020646877] [2021-11-21 01:34:15,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020646877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:15,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [738315295] [2021-11-21 01:34:15,163 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:34:15,163 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:15,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:15,163 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:15,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:15,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,423 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:34:15,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:34:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 01:34:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-11-21 01:34:15,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:15,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 84 [2021-11-21 01:34:15,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:15,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:15,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2021-11-21 01:34:16,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:16,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:16,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:16,273 INFO L354 Elim1Store]: treesize reduction 220, result has 20.6 percent of original size [2021-11-21 01:34:16,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 278 treesize of output 316 [2021-11-21 01:34:17,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:17,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:17,655 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-11-21 01:34:17,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 304 treesize of output 243 [2021-11-21 01:34:18,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:18,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:18,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:18,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:18,646 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 01:34:18,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 168 [2021-11-21 01:34:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:18,698 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:34:18,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 18 [2021-11-21 01:34:18,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:18,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:19,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:19,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:34:19,323 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:34:19,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:34:19,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:19,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2021-11-21 01:34:19,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:19,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:19,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:19,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:34:20,006 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:34:20,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:34:20,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:20,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2021-11-21 01:34:20,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:20,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:22,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:22,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 01:34:24,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:34:24,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:25,171 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:34:25,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:34:25,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:25,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2021-11-21 01:34:25,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:25,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:25,689 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:34:25,708 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 18 for LOIs [2021-11-21 01:34:25,749 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:27,448 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:27,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:34:27,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 01:34:27,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733738655] [2021-11-21 01:34:27,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:27,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:34:27,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:27,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:34:27,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:34:27,450 INFO L87 Difference]: Start difference. First operand 142 states and 167 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:34:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:27,876 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2021-11-21 01:34:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:34:27,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-11-21 01:34:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:27,879 INFO L225 Difference]: With dead ends: 157 [2021-11-21 01:34:27,879 INFO L226 Difference]: Without dead ends: 124 [2021-11-21 01:34:27,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 01:34:27,881 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:27,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 104 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:34:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-21 01:34:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2021-11-21 01:34:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 90 states have internal predecessors, (104), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-21 01:34:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2021-11-21 01:34:27,899 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 44 [2021-11-21 01:34:27,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:27,899 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2021-11-21 01:34:27,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:34:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2021-11-21 01:34:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:34:27,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:27,901 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:27,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-21 01:34:28,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:28,105 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1757907762, now seen corresponding path program 8 times [2021-11-21 01:34:28,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:28,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472734311] [2021-11-21 01:34:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:28,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:28,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:28,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347999485] [2021-11-21 01:34:28,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:34:28,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:28,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:28,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:28,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:34:28,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-21 01:34:28,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:28,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:34:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 01:34:28,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 01:34:28,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:28,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472734311] [2021-11-21 01:34:28,604 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:28,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347999485] [2021-11-21 01:34:28,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347999485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:28,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1360326540] [2021-11-21 01:34:28,606 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:34:28,607 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:28,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:28,607 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:28,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:28,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:28,932 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 01:34:28,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 01:34:28,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-11-21 01:34:29,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:29,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:29,059 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:34:29,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 01:34:29,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-11-21 01:34:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:29,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:29,347 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:34:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:34:29,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:29,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:29,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 84 [2021-11-21 01:34:29,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:29,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2021-11-21 01:34:30,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:30,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:30,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:30,119 INFO L354 Elim1Store]: treesize reduction 228, result has 22.2 percent of original size [2021-11-21 01:34:30,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 278 treesize of output 328 [2021-11-21 01:34:30,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:31,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:31,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:31,495 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-11-21 01:34:31,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 296 treesize of output 245 [2021-11-21 01:34:31,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:31,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:32,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:32,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:32,603 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-11-21 01:34:32,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 160 [2021-11-21 01:34:32,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:32,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:33,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,093 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-21 01:34:33,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 180 treesize of output 146 [2021-11-21 01:34:33,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:33,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:33,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:33,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:33,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:34:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:33,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 41 [2021-11-21 01:34:33,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:33,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:34,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:34,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:34,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 116 [2021-11-21 01:34:34,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 01:34:34,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:34,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:36,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 01:34:36,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:38,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:38,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:34:39,156 INFO L354 Elim1Store]: treesize reduction 116, result has 28.8 percent of original size [2021-11-21 01:34:39,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 124 [2021-11-21 01:34:39,280 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:39,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:39,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2021-11-21 01:34:39,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:39,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:34:39,660 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:34:39,685 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2021-11-21 01:34:39,728 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:41,514 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:41,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:34:41,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-21 01:34:41,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591689246] [2021-11-21 01:34:41,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:41,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:34:41,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:34:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:34:41,516 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:34:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:42,096 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-11-21 01:34:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 01:34:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-11-21 01:34:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:42,098 INFO L225 Difference]: With dead ends: 143 [2021-11-21 01:34:42,098 INFO L226 Difference]: Without dead ends: 104 [2021-11-21 01:34:42,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:34:42,100 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:42,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 120 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:34:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-21 01:34:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-11-21 01:34:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-21 01:34:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-11-21 01:34:42,119 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 44 [2021-11-21 01:34:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:42,119 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-11-21 01:34:42,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:34:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-11-21 01:34:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 01:34:42,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:42,121 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:42,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-21 01:34:42,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:34:42,325 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash 172129101, now seen corresponding path program 1 times [2021-11-21 01:34:42,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:42,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149065895] [2021-11-21 01:34:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:42,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:42,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:42,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200176766] [2021-11-21 01:34:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:42,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:42,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:42,336 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:42,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae682bd7-1c25-47d5-ae5b-5c87e41eae77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:34:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:43,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 01:34:43,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:43,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 01:34:43,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:34:43,177 INFO L354 Elim1Store]: treesize reduction 120, result has 20.5 percent of original size [2021-11-21 01:34:43,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 87 [2021-11-21 01:34:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 7 [2021-11-21 01:34:43,376 INFO L354 Elim1Store]: treesize reduction 291, result has 19.6 percent of original size [2021-11-21 01:34:43,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 128 [2021-11-21 01:34:43,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:43,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:43,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 39 [2021-11-21 01:34:43,550 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-21 01:34:43,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-21 01:34:43,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:43,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:43,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:43,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:43,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:43,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 22 [2021-11-21 01:35:00,068 INFO L354 Elim1Store]: treesize reduction 374, result has 38.3 percent of original size [2021-11-21 01:35:00,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 107 treesize of output 305 [2021-11-21 01:35:02,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:03,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:03,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:03,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:03,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:03,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:03,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:03,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:03,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 145 treesize of output 196 [2021-11-21 01:35:41,100 INFO L354 Elim1Store]: treesize reduction 1214, result has 26.6 percent of original size [2021-11-21 01:35:41,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 280 treesize of output 577 [2021-11-21 01:37:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:05,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:37:06,863 INFO L354 Elim1Store]: treesize reduction 969, result has 49.4 percent of original size [2021-11-21 01:37:06,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 63 case distinctions, treesize of input 1401 treesize of output 2088