./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array26_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_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/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_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array26_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/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_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/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 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:55:42,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:55:42,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:55:42,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:55:42,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:55:42,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:55:42,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:55:42,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:55:42,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:55:42,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:55:42,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:55:42,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:55:42,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:55:42,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:55:42,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:55:42,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:55:42,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:55:42,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:55:42,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:55:42,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:55:42,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:55:42,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:55:42,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:55:42,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:55:42,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:55:42,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:55:42,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:55:42,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:55:42,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:55:42,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:55:42,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:55:42,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:55:42,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:55:42,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:55:42,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:55:42,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:55:42,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:55:42,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:55:42,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:55:42,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:55:42,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:55:42,479 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:55:42,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:55:42,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:55:42,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:55:42,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:55:42,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:55:42,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:55:42,504 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:55:42,504 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:55:42,505 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:55:42,505 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:55:42,505 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:55:42,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:55:42,506 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:55:42,506 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:55:42,506 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:55:42,506 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:55:42,506 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:55:42,507 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:55:42,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:55:42,508 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:55:42,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:55:42,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:55:42,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:55:42,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:55:42,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:55:42,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:55:42,509 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:55:42,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:55:42,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:55:42,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:55:42,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:55:42,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:55:42,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:55:42,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:55:42,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:55:42,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:55:42,512 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:55:42,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:55:42,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:55:42,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:55:42,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:55:42,513 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_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 [2021-11-21 01:55:42,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:55:42,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:55:42,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:55:42,788 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:55:42,790 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:55:42,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array26_pattern.c [2021-11-21 01:55:42,870 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/data/c778bbdcf/1601b882d2a749b38c0bf47e892062f2/FLAGac9fb1e67 [2021-11-21 01:55:43,404 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:55:43,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/sv-benchmarks/c/array-patterns/array26_pattern.c [2021-11-21 01:55:43,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/data/c778bbdcf/1601b882d2a749b38c0bf47e892062f2/FLAGac9fb1e67 [2021-11-21 01:55:43,746 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/data/c778bbdcf/1601b882d2a749b38c0bf47e892062f2 [2021-11-21 01:55:43,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:55:43,765 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:55:43,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:55:43,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:55:43,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:55:43,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:55:43" (1/1) ... [2021-11-21 01:55:43,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e30c218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:43, skipping insertion in model container [2021-11-21 01:55:43,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:55:43" (1/1) ... [2021-11-21 01:55:43,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:55:43,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:55:44,006 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_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-11-21 01:55:44,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:55:44,050 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:55:44,066 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_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-11-21 01:55:44,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:55:44,109 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:55:44,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44 WrapperNode [2021-11-21 01:55:44,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:55:44,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:55:44,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:55:44,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:55:44,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (1/1) ... [2021-11-21 01:55:44,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (1/1) ... [2021-11-21 01:55:44,169 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-11-21 01:55:44,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:55:44,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:55:44,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:55:44,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:55:44,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (1/1) ... [2021-11-21 01:55:44,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (1/1) ... [2021-11-21 01:55:44,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (1/1) ... [2021-11-21 01:55:44,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (1/1) ... [2021-11-21 01:55:44,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (1/1) ... [2021-11-21 01:55:44,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (1/1) ... [2021-11-21 01:55:44,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (1/1) ... [2021-11-21 01:55:44,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:55:44,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:55:44,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:55:44,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:55:44,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (1/1) ... [2021-11-21 01:55:44,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:55:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:44,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:55:44,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:55:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:55:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:55:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:55:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:55:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:55:44,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:55:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:55:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:55:44,382 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:55:44,384 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:55:44,614 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:55:44,704 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:55:44,704 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:55:44,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:44 BoogieIcfgContainer [2021-11-21 01:55:44,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:55:44,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:55:44,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:55:44,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:55:44,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:55:43" (1/3) ... [2021-11-21 01:55:44,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a16cb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:55:44, skipping insertion in model container [2021-11-21 01:55:44,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:44" (2/3) ... [2021-11-21 01:55:44,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a16cb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:55:44, skipping insertion in model container [2021-11-21 01:55:44,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:44" (3/3) ... [2021-11-21 01:55:44,729 INFO L111 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2021-11-21 01:55:44,734 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:55:44,734 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:55:44,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:55:44,812 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 01:55:44,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:55:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:55:44,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:44,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:55:44,843 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:44,848 INFO L85 PathProgramCache]: Analyzing trace with hash 125866462, now seen corresponding path program 1 times [2021-11-21 01:55:44,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:44,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422578210] [2021-11-21 01:55:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:44,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:44,942 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:55:44,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272591707] [2021-11-21 01:55:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:44,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:44,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:44,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:44,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:55:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:45,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:55:45,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:45,142 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 01:55:45,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:55:45,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:45,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422578210] [2021-11-21 01:55:45,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:55:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272591707] [2021-11-21 01:55:45,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272591707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:45,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:45,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:55:45,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105853888] [2021-11-21 01:55:45,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:45,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:55:45,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:55:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:55:45,200 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:45,253 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-21 01:55:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:55:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 01:55:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:45,263 INFO L225 Difference]: With dead ends: 19 [2021-11-21 01:55:45,263 INFO L226 Difference]: Without dead ends: 10 [2021-11-21 01:55:45,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 01:55:45,269 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:45,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 11 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:55:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-21 01:55:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-21 01:55:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2021-11-21 01:55:45,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 5 [2021-11-21 01:55:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:45,300 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2021-11-21 01:55:45,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2021-11-21 01:55:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:55:45,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:45,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:55:45,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:55:45,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:45,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash -866876814, now seen corresponding path program 1 times [2021-11-21 01:55:45,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:45,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364974421] [2021-11-21 01:55:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:45,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:45,525 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:55:45,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943342215] [2021-11-21 01:55:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:45,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:45,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:45,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:45,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:55:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:45,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:55:45,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:55:45,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:55:45,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:45,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364974421] [2021-11-21 01:55:45,612 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:55:45,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943342215] [2021-11-21 01:55:45,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943342215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:45,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:45,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:55:45,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765460137] [2021-11-21 01:55:45,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:45,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:55:45,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:55:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:55:45,615 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:45,659 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2021-11-21 01:55:45,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:55:45,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:55:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:45,661 INFO L225 Difference]: With dead ends: 23 [2021-11-21 01:55:45,661 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 01:55:45,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 01:55:45,663 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:45,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:55:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 01:55:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2021-11-21 01:55:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-11-21 01:55:45,668 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2021-11-21 01:55:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:45,669 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-11-21 01:55:45,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-11-21 01:55:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:55:45,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:45,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:55:45,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:55:45,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-21 01:55:45,894 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash -336103705, now seen corresponding path program 1 times [2021-11-21 01:55:45,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:45,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198210516] [2021-11-21 01:55:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:45,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:45,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:55:45,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893029542] [2021-11-21 01:55:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:45,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:45,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:45,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:45,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:55:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:55:45,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:55:45,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:55:45,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:45,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198210516] [2021-11-21 01:55:45,994 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:55:45,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893029542] [2021-11-21 01:55:45,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893029542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:45,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:45,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:55:45,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350032429] [2021-11-21 01:55:45,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:45,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:55:45,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:45,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:55:45,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:55:45,996 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:46,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:46,041 INFO L93 Difference]: Finished difference Result 22 states and 32 transitions. [2021-11-21 01:55:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:55:46,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:55:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:46,042 INFO L225 Difference]: With dead ends: 22 [2021-11-21 01:55:46,042 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 01:55:46,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 01:55:46,044 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:46,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:55:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 01:55:46,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-21 01:55:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-11-21 01:55:46,049 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 10 [2021-11-21 01:55:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:46,050 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-11-21 01:55:46,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-11-21 01:55:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:55:46,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:46,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:55:46,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-21 01:55:46,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:46,271 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:46,271 INFO L85 PathProgramCache]: Analyzing trace with hash -354172048, now seen corresponding path program 1 times [2021-11-21 01:55:46,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:46,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706189009] [2021-11-21 01:55:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:46,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:46,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:55:46,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958861833] [2021-11-21 01:55:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:46,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:46,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:46,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:46,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:55:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:55:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:55:46,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:55:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:55:46,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:46,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706189009] [2021-11-21 01:55:46,505 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:55:46,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958861833] [2021-11-21 01:55:46,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958861833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:55:46,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1511528365] [2021-11-21 01:55:46,524 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:55:46,524 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:55:46,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:55:46,534 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:55:46,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:55:46,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:46,754 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:55:46,755 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 01:55:46,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:46,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:46,856 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 01:55:46,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:47,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:47,056 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 01:55:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:47,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:47,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 265 [2021-11-21 01:55:47,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:47,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:47,785 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 42 treesize of output 18 [2021-11-21 01:55:47,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:47,804 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 60 treesize of output 28 [2021-11-21 01:55:47,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:47,829 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 56 treesize of output 24 [2021-11-21 01:55:48,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:48,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:48,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:48,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:48,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:48,122 INFO L354 Elim1Store]: treesize reduction 216, result has 11.8 percent of original size [2021-11-21 01:55:48,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 498 treesize of output 548 [2021-11-21 01:55:48,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:48,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:48,206 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 77 treesize of output 37 [2021-11-21 01:55:48,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:48,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:48,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:48,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:48,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:48,685 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 01:55:48,685 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 530 treesize of output 426 [2021-11-21 01:55:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:49,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:49,519 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 111 treesize of output 63 [2021-11-21 01:55:49,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:50,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:50,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:50,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:50,615 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 01:55:50,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 439 treesize of output 271 [2021-11-21 01:55:51,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:55:51,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 215 [2021-11-21 01:55:51,820 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 35 treesize of output 19 [2021-11-21 01:55:51,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:51,963 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 19 treesize of output 3 [2021-11-21 01:55:51,992 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 19 treesize of output 3 [2021-11-21 01:55:52,053 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 153 treesize of output 73 [2021-11-21 01:55:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:53,015 INFO L354 Elim1Store]: treesize reduction 200, result has 12.7 percent of original size [2021-11-21 01:55:53,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 362 treesize of output 364 [2021-11-21 01:55:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:53,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:55:53,170 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 60 treesize of output 36 [2021-11-21 01:55:53,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:53,431 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:55:53,431 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 01:55:53,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:53,558 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-21 01:55:53,558 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 185 treesize of output 153 [2021-11-21 01:55:53,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:55:53,967 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:55:53,967 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 298 treesize of output 166 [2021-11-21 01:55:54,504 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 01:55:54,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:54,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:54,569 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 01:55:54,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:54,654 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 01:55:55,036 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 01:55:55,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:55,072 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 01:55:55,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:55,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:55,389 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 01:55:55,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:55,432 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 25 treesize of output 21 [2021-11-21 01:55:55,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:55,508 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 01:55:55,988 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 01:55:55,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:56,031 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 01:55:56,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:56,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:56,232 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 01:55:56,266 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 25 treesize of output 21 [2021-11-21 01:55:56,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:56,342 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 01:55:56,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:58,385 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 01:55:58,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:58,418 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 01:55:58,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:58,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:58,567 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 01:55:58,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:58,626 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 25 treesize of output 21 [2021-11-21 01:55:58,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:55:58,663 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 01:55:58,752 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:55:59,492 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:55:59,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:55:59,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-21 01:55:59,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772609322] [2021-11-21 01:55:59,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:55:59,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:55:59,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:59,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:55:59,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:55:59,495 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:59,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:59,582 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2021-11-21 01:55:59,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:55:59,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 01:55:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:59,583 INFO L225 Difference]: With dead ends: 24 [2021-11-21 01:55:59,584 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:55:59,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:55:59,585 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:59,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 4 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:55:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:55:59,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 01:55:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-21 01:55:59,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2021-11-21 01:55:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:59,591 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-21 01:55:59,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:55:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-21 01:55:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:55:59,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:59,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:55:59,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:55:59,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:59,818 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:59,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:59,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1704645526, now seen corresponding path program 2 times [2021-11-21 01:55:59,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:59,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346799012] [2021-11-21 01:55:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:59,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:59,823 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:55:59,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909086796] [2021-11-21 01:55:59,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:55:59,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:59,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:59,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:59,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:55:59,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:55:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:55:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:55:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:55:59,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:56:00,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:00,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346799012] [2021-11-21 01:56:00,006 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:56:00,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909086796] [2021-11-21 01:56:00,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909086796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:56:00,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1784493871] [2021-11-21 01:56:00,010 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:56:00,010 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:56:00,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:56:00,010 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:56:00,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:56:00,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:00,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:00,208 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 01:56:00,208 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 01:56:00,286 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 01:56:00,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:00,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:00,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:56:00,346 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 41 treesize of output 41 [2021-11-21 01:56:00,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:00,601 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:56:00,601 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 01:56:00,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:00,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:00,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 265 [2021-11-21 01:56:01,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:01,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:01,147 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 42 treesize of output 18 [2021-11-21 01:56:01,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:01,170 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 60 treesize of output 28 [2021-11-21 01:56:01,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:01,203 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 56 treesize of output 24 [2021-11-21 01:56:01,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:01,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:01,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:01,794 INFO L354 Elim1Store]: treesize reduction 232, result has 11.1 percent of original size [2021-11-21 01:56:01,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 498 treesize of output 556 [2021-11-21 01:56:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:01,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:01,957 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 55 [2021-11-21 01:56:02,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:02,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:02,119 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 97 treesize of output 55 [2021-11-21 01:56:02,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:02,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:02,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:02,355 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-11-21 01:56:02,355 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 364 treesize of output 310 [2021-11-21 01:56:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:03,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:03,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:03,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:03,104 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:56:03,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 4 case distinctions, treesize of input 298 treesize of output 240 [2021-11-21 01:56:03,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:03,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:03,812 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 140 treesize of output 46 [2021-11-21 01:56:04,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:04,368 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 01:56:04,400 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 01:56:04,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:05,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,307 INFO L354 Elim1Store]: treesize reduction 200, result has 12.7 percent of original size [2021-11-21 01:56:05,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 354 treesize of output 356 [2021-11-21 01:56:05,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,466 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 89 treesize of output 51 [2021-11-21 01:56:05,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:05,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:56:05,727 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 82 treesize of output 48 [2021-11-21 01:56:06,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:56:06,193 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 42 treesize of output 18 [2021-11-21 01:56:06,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,439 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 78 treesize of output 38 [2021-11-21 01:56:06,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:06,711 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:56:06,711 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 209 treesize of output 175 [2021-11-21 01:56:06,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:06,973 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 01:56:06,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:07,007 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 25 treesize of output 21 [2021-11-21 01:56:07,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:07,076 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 01:56:07,475 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 01:56:07,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:07,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 01:56:07,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:07,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:07,770 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 01:56:07,793 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 01:56:07,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:07,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:07,879 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 01:56:08,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:08,217 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 19 treesize of output 15 [2021-11-21 01:56:08,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:08,257 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 01:56:08,488 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 01:56:08,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:08,520 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 01:56:08,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:08,562 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 25 treesize of output 21 [2021-11-21 01:56:08,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:10,184 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 01:56:10,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:10,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:10,241 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 01:56:10,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:10,493 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 01:56:10,538 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 01:56:10,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:10,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:10,583 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 01:56:10,876 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:56:11,634 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:56:11,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:56:11,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-21 01:56:11,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806606241] [2021-11-21 01:56:11,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:56:11,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:56:11,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:56:11,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:56:11,636 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:11,693 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-11-21 01:56:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:56:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:56:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:11,695 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:56:11,695 INFO L226 Difference]: Without dead ends: 21 [2021-11-21 01:56:11,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:56:11,696 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:11,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 7 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:56:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-21 01:56:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-11-21 01:56:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-21 01:56:11,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2021-11-21 01:56:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:11,702 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-21 01:56:11,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-21 01:56:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:56:11,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:11,703 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:11,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:56:11,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:11,926 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1229225183, now seen corresponding path program 3 times [2021-11-21 01:56:11,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:11,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7935962] [2021-11-21 01:56:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:11,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:11,931 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:56:11,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788771769] [2021-11-21 01:56:11,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:56:11,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:11,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:11,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:56:11,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:56:11,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:56:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:56:11,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:56:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:56:12,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:56:12,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:12,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7935962] [2021-11-21 01:56:12,108 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:56:12,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788771769] [2021-11-21 01:56:12,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788771769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:56:12,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1735545917] [2021-11-21 01:56:12,114 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:56:12,115 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:56:12,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:56:12,115 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:56:12,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:56:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:12,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:12,182 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:56:12,183 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 01:56:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:12,240 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 01:56:12,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:12,295 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 39 treesize of output 31 [2021-11-21 01:56:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:12,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:12,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 189 [2021-11-21 01:56:13,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:13,024 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 18 [2021-11-21 01:56:13,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:13,044 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 58 treesize of output 28 [2021-11-21 01:56:13,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:13,076 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 01:56:13,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:13,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:13,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:13,638 INFO L354 Elim1Store]: treesize reduction 440, result has 23.7 percent of original size [2021-11-21 01:56:13,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 496 treesize of output 580 [2021-11-21 01:56:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:14,535 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 42 treesize of output 18 [2021-11-21 01:56:14,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:14,986 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 73 treesize of output 35 [2021-11-21 01:56:15,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:15,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:15,799 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 42 treesize of output 18 [2021-11-21 01:56:16,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:16,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:16,252 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 107 treesize of output 61 [2021-11-21 01:56:16,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:16,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:17,008 INFO L354 Elim1Store]: treesize reduction 49, result has 22.2 percent of original size [2021-11-21 01:56:17,009 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 404 treesize of output 270 [2021-11-21 01:56:18,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:56:18,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 223 [2021-11-21 01:56:18,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:18,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-11-21 01:56:18,364 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 01:56:18,373 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 149 treesize of output 59 [2021-11-21 01:56:18,425 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 01:56:18,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:18,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:19,140 INFO L354 Elim1Store]: treesize reduction 168, result has 14.7 percent of original size [2021-11-21 01:56:19,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 272 [2021-11-21 01:56:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:19,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:19,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:56:19,216 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 40 treesize of output 18 [2021-11-21 01:56:19,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:19,278 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 18 [2021-11-21 01:56:19,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:19,372 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-21 01:56:19,373 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 52 treesize of output 30 [2021-11-21 01:56:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:19,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:56:19,575 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 173 treesize of output 113 [2021-11-21 01:56:19,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:19,822 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 21 [2021-11-21 01:56:20,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:20,245 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 01:56:20,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:20,271 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 01:56:20,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:20,351 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 01:56:20,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:20,496 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 01:56:20,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:20,542 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 01:56:20,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:20,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:56:20,979 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 01:56:20,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:21,021 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 01:56:21,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:21,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:21,305 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 01:56:21,343 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 01:56:21,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:21,385 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 01:56:21,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:22,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:22,808 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 01:56:22,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:22,835 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 01:56:23,001 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 01:56:23,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:23,054 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 01:56:23,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:23,090 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 01:56:23,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:56:23,217 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:56:23,652 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:56:23,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:56:23,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 01:56:23,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817363184] [2021-11-21 01:56:23,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:56:23,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:56:23,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:56:23,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:56:23,654 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:23,773 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-21 01:56:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:56:23,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:56:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:23,774 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:56:23,774 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 01:56:23,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:56:23,776 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:23,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 8 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:56:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 01:56:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-11-21 01:56:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-21 01:56:23,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2021-11-21 01:56:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:23,784 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-21 01:56:23,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-21 01:56:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:56:23,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:23,785 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 01:56:23,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 01:56:23,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:56:23,990 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2025767346, now seen corresponding path program 4 times [2021-11-21 01:56:23,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:23,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392197553] [2021-11-21 01:56:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:23,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:23,994 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:56:23,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122806247] [2021-11-21 01:56:23,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:56:23,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:23,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:23,995 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:56:23,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:56:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:24,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-21 01:56:24,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:24,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:56:24,452 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 01:56:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 192 [2021-11-21 01:56:24,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,613 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 46 treesize of output 19 [2021-11-21 01:56:24,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,661 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 46 treesize of output 19 [2021-11-21 01:56:24,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,675 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 86 treesize of output 37 [2021-11-21 01:56:24,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-11-21 01:56:24,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:56:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 271 [2021-11-21 01:56:24,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,935 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 68 treesize of output 25 [2021-11-21 01:56:24,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,964 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 66 treesize of output 25 [2021-11-21 01:56:24,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:24,976 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 86 treesize of output 28 [2021-11-21 01:56:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:56:25,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 115 [2021-11-21 01:56:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:56:25,118 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 69 treesize of output 32 [2021-11-21 01:56:25,812 INFO L354 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2021-11-21 01:56:25,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 48 [2021-11-21 01:56:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:25,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:53,773 WARN L227 SmtUtils]: Spent 28.32s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:59:16,468 WARN L227 SmtUtils]: Spent 35.42s on a formula simplification that was a NOOP. DAG size: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:00:46,065 WARN L227 SmtUtils]: Spent 45.06s on a formula simplification that was a NOOP. DAG size: 173 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:00:53,470 WARN L227 SmtUtils]: Spent 7.20s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 02:00:53,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 02:00:53,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 4363 treesize of output 4323 [2021-11-21 02:00:56,477 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 19 treesize of output 4 [2021-11-21 02:01:10,996 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 19 treesize of output 4 [2021-11-21 02:01:15,563 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 19 treesize of output 4 [2021-11-21 02:01:45,920 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 4 [2021-11-21 02:01:58,569 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 4 [2021-11-21 02:02:08,595 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 4 [2021-11-21 02:02:29,014 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 4 [2021-11-21 02:02:35,042 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 4 [2021-11-21 02:02:43,561 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 4 [2021-11-21 02:03:05,505 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 19 treesize of output 4 [2021-11-21 02:03:10,319 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 19 treesize of output 4 [2021-11-21 02:03:15,964 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 19 treesize of output 4 [2021-11-21 02:03:28,688 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 4339 treesize of output 4183 [2021-11-21 02:05:09,070 WARN L227 SmtUtils]: Spent 1.65m on a formula simplification. DAG size of input: 142 DAG size of output: 98 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 02:05:09,072 INFO L354 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2021-11-21 02:05:09,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 81146759 treesize of output 76175490 [2021-11-21 02:08:20,816 WARN L227 SmtUtils]: Spent 3.20m on a formula simplification that was a NOOP. DAG size: 17748 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 02:08:21,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 02:08:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392197553] [2021-11-21 02:08:21,487 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 02:08:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122806247] [2021-11-21 02:08:21,487 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 02:08:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1006308931] [2021-11-21 02:08:21,492 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 02:08:21,492 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 02:08:21,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 02:08:21,493 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 02:08:21,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 02:08:21,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:21,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:21,627 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 02:08:21,627 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 02:08:21,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:21,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 02:08:21,710 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 02:08:21,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:21,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:21,917 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 02:08:21,918 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 02:08:22,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:22,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:08:22,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 265 [2021-11-21 02:08:22,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:22,510 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 38 treesize of output 14 [2021-11-21 02:08:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:22,572 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 38 treesize of output 14 [2021-11-21 02:08:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:22,610 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 02:08:22,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:22,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:22,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 02:08:22,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:22,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:22,871 INFO L354 Elim1Store]: treesize reduction 216, result has 11.8 percent of original size [2021-11-21 02:08:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 498 treesize of output 548 [2021-11-21 02:08:22,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:23,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:23,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:23,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:23,248 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 93 treesize of output 53 [2021-11-21 02:08:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:23,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:23,472 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 77 treesize of output 37 [2021-11-21 02:08:23,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:23,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:23,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:23,508 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 02:08:23,508 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 500 treesize of output 356 [2021-11-21 02:08:24,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:24,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:24,246 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 91 treesize of output 43 [2021-11-21 02:08:25,479 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 02:08:25,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:25,552 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 02:08:25,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:26,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:26,443 INFO L354 Elim1Store]: treesize reduction 168, result has 14.7 percent of original size [2021-11-21 02:08:26,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 264 [2021-11-21 02:08:26,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:26,632 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 38 treesize of output 18 [2021-11-21 02:08:26,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:26,735 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-21 02:08:26,736 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 52 treesize of output 30 [2021-11-21 02:08:26,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:26,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:26,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 02:08:26,798 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 141 treesize of output 109 [2021-11-21 02:08:27,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:08:27,283 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-21 02:08:27,283 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 197 treesize of output 159 [2021-11-21 02:08:27,874 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 02:08:27,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:27,973 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 02:08:28,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:28,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 02:08:28,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:28,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:28,579 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 02:08:28,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:28,609 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 02:08:28,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:28,910 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 02:08:28,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:28,999 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 02:08:29,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:29,037 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 02:08:29,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:29,347 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 02:08:29,366 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 02:08:29,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:29,655 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 02:08:29,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:29,693 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 02:08:29,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:29,792 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 02:08:29,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:31,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:31,962 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 02:08:31,995 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 02:08:32,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:32,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:32,318 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 02:08:32,356 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 02:08:32,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:32,417 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 02:08:32,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 02:08:32,752 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 02:08:34,576 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 02:08:34,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-21 02:08:34,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-21 02:08:34,576 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-21 02:08:34,577 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-21 02:08:34,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 02:08:34,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:34,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 02:08:34,793 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2021-11-21 02:08:34,795 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 02:08:34,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 02:08:34 BoogieIcfgContainer [2021-11-21 02:08:34,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 02:08:34,819 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 02:08:34,819 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 02:08:34,820 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 02:08:34,820 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:44" (3/4) ... [2021-11-21 02:08:34,823 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 02:08:34,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 02:08:34,824 INFO L158 Benchmark]: Toolchain (without parser) took 771058.94ms. Allocated memory was 96.5MB in the beginning and 497.0MB in the end (delta: 400.6MB). Free memory was 60.0MB in the beginning and 349.1MB in the end (delta: -289.1MB). Peak memory consumption was 111.6MB. Max. memory is 16.1GB. [2021-11-21 02:08:34,824 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 96.5MB. Free memory is still 76.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 02:08:34,825 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.63ms. Allocated memory is still 96.5MB. Free memory was 59.8MB in the beginning and 72.6MB in the end (delta: -12.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 02:08:34,826 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.18ms. Allocated memory is still 96.5MB. Free memory was 72.6MB in the beginning and 70.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 02:08:34,826 INFO L158 Benchmark]: Boogie Preprocessor took 39.02ms. Allocated memory is still 96.5MB. Free memory was 70.7MB in the beginning and 69.7MB in the end (delta: 977.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 02:08:34,826 INFO L158 Benchmark]: RCFGBuilder took 508.07ms. Allocated memory is still 96.5MB. Free memory was 69.4MB in the beginning and 55.6MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 02:08:34,827 INFO L158 Benchmark]: TraceAbstraction took 770098.28ms. Allocated memory was 96.5MB in the beginning and 497.0MB in the end (delta: 400.6MB). Free memory was 55.0MB in the beginning and 349.1MB in the end (delta: -294.1MB). Peak memory consumption was 108.0MB. Max. memory is 16.1GB. [2021-11-21 02:08:34,827 INFO L158 Benchmark]: Witness Printer took 4.06ms. Allocated memory is still 497.0MB. Free memory is still 349.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 02:08:34,829 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 96.5MB. Free memory is still 76.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.63ms. Allocated memory is still 96.5MB. Free memory was 59.8MB in the beginning and 72.6MB in the end (delta: -12.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.18ms. Allocated memory is still 96.5MB. Free memory was 72.6MB in the beginning and 70.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.02ms. Allocated memory is still 96.5MB. Free memory was 70.7MB in the beginning and 69.7MB in the end (delta: 977.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 508.07ms. Allocated memory is still 96.5MB. Free memory was 69.4MB in the beginning and 55.6MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 770098.28ms. Allocated memory was 96.5MB in the beginning and 497.0MB in the end (delta: 400.6MB). Free memory was 55.0MB in the beginning and 349.1MB in the end (delta: -294.1MB). Peak memory consumption was 108.0MB. Max. memory is 16.1GB. * Witness Printer took 4.06ms. Allocated memory is still 497.0MB. Free memory is still 349.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 34]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L38] signed long long ARR_SIZE ; [L42] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L43] CALL assume_abort_if_not(ARR_SIZE > 1) [L32] COND TRUE !cond [L43] RET assume_abort_if_not(ARR_SIZE > 1) [L45] int array[ARR_SIZE][ARR_SIZE] ; [L47] int row = 0, column = 0, num = -1, value = 1 ; [L48] signed long long sum = 0; [L51] row=0 [L51] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/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 -> 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 [2021-11-21 02:08:37,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 02:08:37,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 02:08:37,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 02:08:37,904 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 02:08:37,906 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 02:08:37,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array26_pattern.c [2021-11-21 02:08:37,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/data/2918f3f24/c5812da6ac9f46608f6e3e7b09b262ec/FLAG7c4bad0c4 [2021-11-21 02:08:38,543 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 02:08:38,544 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/sv-benchmarks/c/array-patterns/array26_pattern.c [2021-11-21 02:08:38,551 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/data/2918f3f24/c5812da6ac9f46608f6e3e7b09b262ec/FLAG7c4bad0c4 [2021-11-21 02:08:38,907 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/data/2918f3f24/c5812da6ac9f46608f6e3e7b09b262ec [2021-11-21 02:08:38,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 02:08:38,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 02:08:38,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 02:08:38,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 02:08:38,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 02:08:38,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 02:08:38" (1/1) ... [2021-11-21 02:08:38,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab7ad4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:38, skipping insertion in model container [2021-11-21 02:08:38,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 02:08:38" (1/1) ... [2021-11-21 02:08:38,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 02:08:38,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 02:08:39,102 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_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-11-21 02:08:39,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 02:08:39,144 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 02:08:39,177 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_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-11-21 02:08:39,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 02:08:39,212 INFO L208 MainTranslator]: Completed translation [2021-11-21 02:08:39,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39 WrapperNode [2021-11-21 02:08:39,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 02:08:39,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 02:08:39,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 02:08:39,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 02:08:39,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (1/1) ... [2021-11-21 02:08:39,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (1/1) ... [2021-11-21 02:08:39,270 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2021-11-21 02:08:39,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 02:08:39,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 02:08:39,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 02:08:39,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 02:08:39,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (1/1) ... [2021-11-21 02:08:39,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (1/1) ... [2021-11-21 02:08:39,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (1/1) ... [2021-11-21 02:08:39,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (1/1) ... [2021-11-21 02:08:39,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (1/1) ... [2021-11-21 02:08:39,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (1/1) ... [2021-11-21 02:08:39,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (1/1) ... [2021-11-21 02:08:39,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 02:08:39,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 02:08:39,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 02:08:39,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 02:08:39,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (1/1) ... [2021-11-21 02:08:39,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 02:08:39,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:08:39,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 02:08:39,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 02:08:39,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 02:08:39,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 02:08:39,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 02:08:39,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 02:08:39,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 02:08:39,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 02:08:39,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 02:08:39,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 02:08:39,508 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 02:08:39,509 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 02:08:39,927 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 02:08:39,933 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 02:08:39,934 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 02:08:39,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 02:08:39 BoogieIcfgContainer [2021-11-21 02:08:39,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 02:08:39,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 02:08:39,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 02:08:39,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 02:08:39,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 02:08:38" (1/3) ... [2021-11-21 02:08:39,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6efea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 02:08:39, skipping insertion in model container [2021-11-21 02:08:39,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:08:39" (2/3) ... [2021-11-21 02:08:39,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6efea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 02:08:39, skipping insertion in model container [2021-11-21 02:08:39,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 02:08:39" (3/3) ... [2021-11-21 02:08:39,943 INFO L111 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2021-11-21 02:08:39,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 02:08:39,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 02:08:39,996 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 02:08:40,003 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 02:08:40,003 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 02:08:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 02:08:40,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:08:40,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:08:40,023 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:08:40,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:08:40,028 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-11-21 02:08:40,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:08:40,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129821309] [2021-11-21 02:08:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:40,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:08:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:08:40,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:08:40,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 02:08:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:40,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 02:08:40,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:40,182 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 02:08:40,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:40,209 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 02:08:40,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:08:40,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129821309] [2021-11-21 02:08:40,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129821309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 02:08:40,211 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 02:08:40,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 02:08:40,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98151230] [2021-11-21 02:08:40,214 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 02:08:40,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 02:08:40,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:08:40,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 02:08:40,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 02:08:40,246 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:08:40,261 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-11-21 02:08:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 02:08:40,263 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 02:08:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:08:40,270 INFO L225 Difference]: With dead ends: 43 [2021-11-21 02:08:40,271 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 02:08:40,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 02:08:40,277 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 02:08:40,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 02:08:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 02:08:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-21 02:08:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-21 02:08:40,309 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-21 02:08:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:08:40,310 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-21 02:08:40,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-21 02:08:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 02:08:40,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:08:40,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:08:40,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:40,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:08:40,523 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:08:40,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:08:40,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-11-21 02:08:40,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:08:40,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533539198] [2021-11-21 02:08:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:40,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:08:40,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:08:40,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:08:40,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 02:08:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:40,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 02:08:40,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:40,670 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 02:08:40,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:40,802 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 02:08:40,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:08:40,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533539198] [2021-11-21 02:08:40,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533539198] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 02:08:40,804 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 02:08:40,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 02:08:40,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236019894] [2021-11-21 02:08:40,805 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 02:08:40,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 02:08:40,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:08:40,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 02:08:40,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 02:08:40,807 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:08:40,870 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-21 02:08:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 02:08:40,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 02:08:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:08:40,872 INFO L225 Difference]: With dead ends: 26 [2021-11-21 02:08:40,872 INFO L226 Difference]: Without dead ends: 22 [2021-11-21 02:08:40,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 02:08:40,874 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 02:08:40,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 02:08:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-21 02:08:40,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-21 02:08:40,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-21 02:08:40,881 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-11-21 02:08:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:08:40,882 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-21 02:08:40,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-21 02:08:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 02:08:40,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:08:40,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:08:40,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:41,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:08:41,090 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:08:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:08:41,091 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-11-21 02:08:41,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:08:41,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656859034] [2021-11-21 02:08:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:41,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:08:41,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:08:41,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:08:41,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 02:08:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:41,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 02:08:41,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:41,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:41,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:08:41,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656859034] [2021-11-21 02:08:41,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656859034] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 02:08:41,588 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 02:08:41,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 02:08:41,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024254009] [2021-11-21 02:08:41,594 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 02:08:41,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 02:08:41,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:08:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 02:08:41,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 02:08:41,598 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:08:41,783 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-21 02:08:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 02:08:41,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 02:08:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:08:41,790 INFO L225 Difference]: With dead ends: 35 [2021-11-21 02:08:41,790 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 02:08:41,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 02:08:41,792 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 02:08:41,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2021-11-21 02:08:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 02:08:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-21 02:08:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-21 02:08:41,801 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-11-21 02:08:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:08:41,801 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-21 02:08:41,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-21 02:08:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 02:08:41,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:08:41,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:08:41,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:42,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:08:42,018 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:08:42,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:08:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-11-21 02:08:42,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:08:42,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078968051] [2021-11-21 02:08:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:42,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:08:42,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:08:42,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:08:42,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 02:08:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:42,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 02:08:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:42,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:42,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:08:42,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078968051] [2021-11-21 02:08:42,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078968051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 02:08:42,420 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 02:08:42,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 02:08:42,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419942973] [2021-11-21 02:08:42,421 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 02:08:42,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 02:08:42,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:08:42,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 02:08:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 02:08:42,423 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:08:42,623 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2021-11-21 02:08:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 02:08:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 02:08:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:08:42,625 INFO L225 Difference]: With dead ends: 42 [2021-11-21 02:08:42,625 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 02:08:42,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 02:08:42,627 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 02:08:42,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2021-11-21 02:08:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 02:08:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-21 02:08:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-21 02:08:42,633 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 18 [2021-11-21 02:08:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:08:42,634 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-21 02:08:42,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-21 02:08:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 02:08:42,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:08:42,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:08:42,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:42,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:08:42,847 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:08:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:08:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-11-21 02:08:42,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:08:42,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438919847] [2021-11-21 02:08:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:42,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:08:42,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:08:42,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:08:42,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 02:08:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 02:08:42,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:43,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:43,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:08:43,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438919847] [2021-11-21 02:08:43,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438919847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:43,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [178759520] [2021-11-21 02:08:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:43,445 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:08:43,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:08:43,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:08:43,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-21 02:08:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:43,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 02:08:43,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:43,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:44,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [178759520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:44,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521863294] [2021-11-21 02:08:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:44,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:08:44,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:08:44,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:08:44,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 02:08:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:44,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 02:08:44,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:44,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:44,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521863294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:44,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:08:44,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 7, 7] total 18 [2021-11-21 02:08:44,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251475933] [2021-11-21 02:08:44,548 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:08:44,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 02:08:44,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:08:44,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 02:08:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-11-21 02:08:44,549 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:08:44,732 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-11-21 02:08:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 02:08:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-21 02:08:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:08:44,733 INFO L225 Difference]: With dead ends: 46 [2021-11-21 02:08:44,733 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 02:08:44,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-11-21 02:08:44,735 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 02:08:44,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 61 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2021-11-21 02:08:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 02:08:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-21 02:08:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-21 02:08:44,741 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 21 [2021-11-21 02:08:44,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:08:44,742 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-21 02:08:44,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:44,742 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-21 02:08:44,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 02:08:44,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:08:44,743 INFO L514 BasicCegarLoop]: trace histogram [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 02:08:44,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:44,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:45,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-21 02:08:45,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:08:45,359 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:08:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:08:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1090691504, now seen corresponding path program 1 times [2021-11-21 02:08:45,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:08:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543453842] [2021-11-21 02:08:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:45,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:08:45,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:08:45,361 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:08:45,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 02:08:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:45,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 02:08:45,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:45,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:45,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:08:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543453842] [2021-11-21 02:08:45,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543453842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 02:08:45,603 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 02:08:45,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 02:08:45,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355904110] [2021-11-21 02:08:45,604 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 02:08:45,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 02:08:45,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:08:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 02:08:45,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 02:08:45,605 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:08:45,892 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2021-11-21 02:08:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 02:08:45,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-21 02:08:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:08:45,894 INFO L225 Difference]: With dead ends: 64 [2021-11-21 02:08:45,894 INFO L226 Difference]: Without dead ends: 46 [2021-11-21 02:08:45,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-21 02:08:45,895 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 02:08:45,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 38 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 02:08:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-21 02:08:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-11-21 02:08:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-21 02:08:45,903 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2021-11-21 02:08:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:08:45,903 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-21 02:08:45,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-21 02:08:45,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 02:08:45,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:08:45,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:08:45,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:46,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:08:46,116 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:08:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:08:46,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1958262791, now seen corresponding path program 2 times [2021-11-21 02:08:46,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:08:46,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751296449] [2021-11-21 02:08:46,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:08:46,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:08:46,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:08:46,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:08:46,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 02:08:46,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:08:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:08:46,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 02:08:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:46,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:46,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:08:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751296449] [2021-11-21 02:08:46,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751296449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:46,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [693384275] [2021-11-21 02:08:46,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:08:46,372 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:08:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:08:46,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:08:46,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-21 02:08:46,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:08:46,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:08:46,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 02:08:46,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:47,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:47,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [693384275] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:47,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587964232] [2021-11-21 02:08:47,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:08:47,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:08:47,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:08:47,702 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:08:47,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 02:08:47,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:08:47,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:08:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 02:08:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:47,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:47,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587964232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:47,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:08:47,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 10, 9, 4, 4] total 21 [2021-11-21 02:08:47,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609604026] [2021-11-21 02:08:47,912 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:08:47,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 02:08:47,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:08:47,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 02:08:47,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-11-21 02:08:47,916 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:08:51,128 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2021-11-21 02:08:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-21 02:08:51,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-21 02:08:51,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:08:51,132 INFO L225 Difference]: With dead ends: 106 [2021-11-21 02:08:51,132 INFO L226 Difference]: Without dead ends: 84 [2021-11-21 02:08:51,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 02:08:51,134 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 02:08:51,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 121 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 273 Invalid, 0 Unknown, 117 Unchecked, 0.8s Time] [2021-11-21 02:08:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-21 02:08:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 44. [2021-11-21 02:08:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2021-11-21 02:08:51,147 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 24 [2021-11-21 02:08:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:08:51,148 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2021-11-21 02:08:51,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:08:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2021-11-21 02:08:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 02:08:51,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:08:51,149 INFO L514 BasicCegarLoop]: trace histogram [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 02:08:51,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:51,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:51,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:51,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 02:08:51,758 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:08:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:08:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1982846008, now seen corresponding path program 1 times [2021-11-21 02:08:51,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:08:51,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373440386] [2021-11-21 02:08:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:51,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:08:51,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:08:51,761 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:08:51,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 02:08:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:51,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 02:08:51,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:52,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:52,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:08:52,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373440386] [2021-11-21 02:08:52,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373440386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:52,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2034446523] [2021-11-21 02:08:52,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:52,778 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:08:52,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:08:52,779 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:08:52,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-21 02:08:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:52,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 02:08:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:53,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:08:53,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2034446523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:53,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812976268] [2021-11-21 02:08:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:08:53,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:08:53,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:08:53,764 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:08:53,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 02:08:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:08:53,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 02:08:53,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 02:08:54,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 02:08:54,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812976268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:54,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:08:54,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 9, 6, 7] total 31 [2021-11-21 02:08:54,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677405471] [2021-11-21 02:08:54,527 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:08:54,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 02:08:54,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:08:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 02:08:54,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2021-11-21 02:08:54,529 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:09:01,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:09:01,227 INFO L93 Difference]: Finished difference Result 233 states and 339 transitions. [2021-11-21 02:09:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-21 02:09:01,228 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-21 02:09:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:09:01,230 INFO L225 Difference]: With dead ends: 233 [2021-11-21 02:09:01,231 INFO L226 Difference]: Without dead ends: 198 [2021-11-21 02:09:01,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-11-21 02:09:01,235 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 257 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 02:09:01,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 120 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 631 Invalid, 0 Unknown, 365 Unchecked, 2.2s Time] [2021-11-21 02:09:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-21 02:09:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 142. [2021-11-21 02:09:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.4113475177304964) internal successors, (199), 141 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:09:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 199 transitions. [2021-11-21 02:09:01,259 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 199 transitions. Word has length 25 [2021-11-21 02:09:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:09:01,260 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 199 transitions. [2021-11-21 02:09:01,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:09:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 199 transitions. [2021-11-21 02:09:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 02:09:01,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:09:01,262 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:09:01,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 02:09:01,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-21 02:09:01,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 02:09:01,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:09:01,875 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:09:01,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:09:01,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1883574944, now seen corresponding path program 2 times [2021-11-21 02:09:01,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:09:01,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213304440] [2021-11-21 02:09:01,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:09:01,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:09:01,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:09:01,876 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:09:01,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 02:09:02,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:09:02,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:09:02,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 02:09:02,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:09:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 02:09:02,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:09:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 02:09:03,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:09:03,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213304440] [2021-11-21 02:09:03,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213304440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:09:03,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1539096126] [2021-11-21 02:09:03,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:09:03,162 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:09:03,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:09:03,165 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:09:03,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-21 02:09:03,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:09:03,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:09:03,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 02:09:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:09:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 02:09:03,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:09:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 02:09:04,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1539096126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:09:04,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536654382] [2021-11-21 02:09:04,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:09:04,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:09:04,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:09:04,557 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:09:04,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 02:09:04,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:09:04,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:09:04,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 02:09:04,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:09:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 02:09:04,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:09:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 02:09:05,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536654382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:09:05,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:09:05,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 9, 6, 8] total 40 [2021-11-21 02:09:05,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382545762] [2021-11-21 02:09:05,228 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:09:05,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-21 02:09:05,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:09:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-21 02:09:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1189, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 02:09:05,230 INFO L87 Difference]: Start difference. First operand 142 states and 199 transitions. Second operand has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:09:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:09:07,818 INFO L93 Difference]: Finished difference Result 261 states and 364 transitions. [2021-11-21 02:09:07,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 02:09:07,818 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-21 02:09:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:09:07,820 INFO L225 Difference]: With dead ends: 261 [2021-11-21 02:09:07,820 INFO L226 Difference]: Without dead ends: 192 [2021-11-21 02:09:07,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 162 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=951, Invalid=2589, Unknown=0, NotChecked=0, Total=3540 [2021-11-21 02:09:07,822 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 187 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 02:09:07,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 79 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 117 Invalid, 0 Unknown, 225 Unchecked, 0.4s Time] [2021-11-21 02:09:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-21 02:09:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 145. [2021-11-21 02:09:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3680555555555556) internal successors, (197), 144 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:09:07,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 197 transitions. [2021-11-21 02:09:07,847 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 197 transitions. Word has length 34 [2021-11-21 02:09:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:09:07,848 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 197 transitions. [2021-11-21 02:09:07,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:09:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 197 transitions. [2021-11-21 02:09:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 02:09:07,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:09:07,850 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:09:07,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 02:09:08,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 02:09:08,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-21 02:09:08,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 02:09:08,464 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:09:08,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:09:08,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1108042244, now seen corresponding path program 1 times [2021-11-21 02:09:08,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:09:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085484381] [2021-11-21 02:09:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:09:08,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:09:08,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:09:08,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:09:08,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 02:09:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:09:08,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 02:09:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:09:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 02:09:09,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:09:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 02:09:09,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:09:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085484381] [2021-11-21 02:09:09,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085484381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:09:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999391807] [2021-11-21 02:09:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:09:09,426 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:09:09,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:09:09,426 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:09:09,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-21 02:09:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:09:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 02:09:09,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:09:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 02:09:09,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:09:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 02:09:10,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999391807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:09:10,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283768687] [2021-11-21 02:09:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:09:10,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:09:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:09:10,251 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:09:10,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 02:09:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:09:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 02:09:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:09:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 02:09:10,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:09:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 02:09:10,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283768687] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 02:09:10,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-21 02:09:10,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 8, 10, 8, 6] total 26 [2021-11-21 02:09:10,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60921633] [2021-11-21 02:09:10,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 02:09:10,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 02:09:10,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:09:10,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 02:09:10,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-11-21 02:09:10,829 INFO L87 Difference]: Start difference. First operand 145 states and 197 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:09:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:09:11,029 INFO L93 Difference]: Finished difference Result 177 states and 241 transitions. [2021-11-21 02:09:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 02:09:11,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-21 02:09:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:09:11,031 INFO L225 Difference]: With dead ends: 177 [2021-11-21 02:09:11,031 INFO L226 Difference]: Without dead ends: 144 [2021-11-21 02:09:11,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2021-11-21 02:09:11,033 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 02:09:11,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 19 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 02:09:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-21 02:09:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-11-21 02:09:11,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.3356643356643356) internal successors, (191), 143 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:09:11,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 191 transitions. [2021-11-21 02:09:11,053 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 191 transitions. Word has length 41 [2021-11-21 02:09:11,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:09:11,054 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 191 transitions. [2021-11-21 02:09:11,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:09:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 191 transitions. [2021-11-21 02:09:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 02:09:11,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:09:11,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:09:11,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-21 02:09:11,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-21 02:09:11,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 02:09:11,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:09:11,671 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 02:09:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:09:11,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 2 times [2021-11-21 02:09:11,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:09:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120553703] [2021-11-21 02:09:11,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:09:11,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:09:11,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:09:11,673 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:09:11,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f346d82d-ecfc-4c6e-8bbd-5d1dbb511a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 02:09:11,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:09:11,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:09:11,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-21 02:09:11,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:09:12,256 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 02:09:12,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:12,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-21 02:09:13,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:13,301 INFO L354 Elim1Store]: treesize reduction 65, result has 31.6 percent of original size [2021-11-21 02:09:13,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 53 [2021-11-21 02:09:13,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:13,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 02:09:13,943 INFO L354 Elim1Store]: treesize reduction 91, result has 23.5 percent of original size [2021-11-21 02:09:13,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 66 [2021-11-21 02:09:17,363 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-21 02:09:17,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 32 [2021-11-21 02:09:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:09:17,476 INFO L328 TraceCheckSpWp]: Computing backward predicates...