./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/hash_fun.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/hash_fun.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs --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 0abab60f5c601fd8191c1a2aa712d4ab55460e987c7d41ca7527c2934792cc0b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:20:27,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:20:27,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:20:27,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:20:27,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:20:27,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:20:27,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:20:27,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:20:27,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:20:27,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:20:27,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:20:27,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:20:27,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:20:27,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:20:27,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:20:27,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:20:27,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:20:27,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:20:27,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:20:27,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:20:27,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:20:27,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:20:27,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:20:27,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:20:27,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:20:27,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:20:27,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:20:27,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:20:27,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:20:27,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:20:27,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:20:27,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:20:27,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:20:27,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:20:27,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:20:27,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:20:27,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:20:27,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:20:27,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:20:27,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:20:27,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:20:27,644 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:20:27,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:20:27,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:20:27,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:20:27,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:20:27,708 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:20:27,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:20:27,708 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:20:27,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:20:27,709 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:20:27,709 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:20:27,710 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:20:27,711 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:20:27,711 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:20:27,711 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:20:27,712 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:20:27,712 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:20:27,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:20:27,713 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:20:27,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:20:27,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:20:27,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:20:27,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:20:27,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:20:27,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:20:27,715 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:20:27,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:20:27,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:20:27,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:20:27,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:20:27,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:20:27,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:20:27,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:20:27,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:20:27,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:20:27,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:20:27,721 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:20:27,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:20:27,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:20:27,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:20:27,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:20:27,722 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_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0abab60f5c601fd8191c1a2aa712d4ab55460e987c7d41ca7527c2934792cc0b [2021-11-19 13:20:28,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:20:28,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:20:28,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:20:28,101 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:20:28,102 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:20:28,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/heap-data/hash_fun.i [2021-11-19 13:20:28,179 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/data/55acbb638/37f45c4e8f1f4a6381b40b536b0c1c10/FLAG4dd4f559b [2021-11-19 13:20:28,750 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:20:28,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/sv-benchmarks/c/heap-data/hash_fun.i [2021-11-19 13:20:28,767 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/data/55acbb638/37f45c4e8f1f4a6381b40b536b0c1c10/FLAG4dd4f559b [2021-11-19 13:20:29,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/data/55acbb638/37f45c4e8f1f4a6381b40b536b0c1c10 [2021-11-19 13:20:29,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:20:29,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:20:29,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:20:29,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:20:29,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:20:29,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@968b36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29, skipping insertion in model container [2021-11-19 13:20:29,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:20:29,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:20:29,467 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_663229c3-7eb1-42f4-b380-0182e32f24c6/sv-benchmarks/c/heap-data/hash_fun.i[23732,23745] [2021-11-19 13:20:29,471 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:20:29,480 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:20:29,525 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_663229c3-7eb1-42f4-b380-0182e32f24c6/sv-benchmarks/c/heap-data/hash_fun.i[23732,23745] [2021-11-19 13:20:29,526 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:20:29,566 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:20:29,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29 WrapperNode [2021-11-19 13:20:29,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:20:29,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:20:29,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:20:29,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:20:29,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,621 INFO L137 Inliner]: procedures = 125, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2021-11-19 13:20:29,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:20:29,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:20:29,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:20:29,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:20:29,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:20:29,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:20:29,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:20:29,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:20:29,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (1/1) ... [2021-11-19 13:20:29,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:20:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:29,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:20:29,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:20:29,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 13:20:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 13:20:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:20:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:20:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:20:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:20:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:20:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:20:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:20:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:20:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:20:29,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:20:29,874 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:20:29,885 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:20:30,103 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:20:30,181 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:20:30,181 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 13:20:30,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:20:30 BoogieIcfgContainer [2021-11-19 13:20:30,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:20:30,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:20:30,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:20:30,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:20:30,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:20:29" (1/3) ... [2021-11-19 13:20:30,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad990c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:20:30, skipping insertion in model container [2021-11-19 13:20:30,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:29" (2/3) ... [2021-11-19 13:20:30,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad990c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:20:30, skipping insertion in model container [2021-11-19 13:20:30,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:20:30" (3/3) ... [2021-11-19 13:20:30,197 INFO L111 eAbstractionObserver]: Analyzing ICFG hash_fun.i [2021-11-19 13:20:30,204 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:20:30,205 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:20:30,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:20:30,273 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 [2021-11-19 13:20:30,274 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:20:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) 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) [2021-11-19 13:20:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 13:20:30,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:30,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 13:20:30,299 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:30,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1489123456, now seen corresponding path program 1 times [2021-11-19 13:20:30,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:30,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767165791] [2021-11-19 13:20:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:30,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:30,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:30,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767165791] [2021-11-19 13:20:30,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767165791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:30,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:30,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 13:20:30,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711586991] [2021-11-19 13:20:30,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:30,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:20:30,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:30,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:20:30,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:20:30,551 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:30,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:30,604 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2021-11-19 13:20:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:20:30,610 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-19 13:20:30,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:30,619 INFO L225 Difference]: With dead ends: 19 [2021-11-19 13:20:30,620 INFO L226 Difference]: Without dead ends: 9 [2021-11-19 13:20:30,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:20:30,632 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:30,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:20:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-19 13:20:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-19 13:20:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2021-11-19 13:20:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-19 13:20:30,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-19 13:20:30,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:30,676 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-19 13:20:30,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-19 13:20:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 13:20:30,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:30,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:30,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:20:30,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:30,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash 399260967, now seen corresponding path program 1 times [2021-11-19 13:20:30,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:30,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620976928] [2021-11-19 13:20:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:30,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:30,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:30,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620976928] [2021-11-19 13:20:30,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620976928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:30,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:30,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:20:30,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340372825] [2021-11-19 13:20:30,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:30,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:20:30,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:20:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:20:30,875 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:30,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:30,943 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-19 13:20:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:20:30,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-19 13:20:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:30,945 INFO L225 Difference]: With dead ends: 19 [2021-11-19 13:20:30,946 INFO L226 Difference]: Without dead ends: 11 [2021-11-19 13:20:30,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:20:30,952 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:30,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:20:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-19 13:20:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-19 13:20:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-19 13:20:30,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2021-11-19 13:20:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:30,959 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-19 13:20:30,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-19 13:20:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 13:20:30,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:30,962 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:30,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 13:20:30,963 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash 659355785, now seen corresponding path program 1 times [2021-11-19 13:20:30,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:20:30,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139690298] [2021-11-19 13:20:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:30,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:20:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:31,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:20:31,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139690298] [2021-11-19 13:20:31,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139690298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:20:31,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233158537] [2021-11-19 13:20:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:31,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:31,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:31,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:20:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:31,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:20:31,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:31,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:20:32,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-19 13:20:32,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54712765] [2021-11-19 13:20:32,198 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-19 13:20:32,198 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 13:20:32,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 13:20:32,210 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 13:20:32,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 13:20:32,255 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:32,261 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:32,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:32,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-11-19 13:20:32,264 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 13:20:32,265 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:32,267 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-19 13:20:32,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 102 [2021-11-19 13:20:32,282 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4d7a29af at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:571) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-19 13:20:32,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:20:32,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-19 13:20:32,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292757580] [2021-11-19 13:20:32,288 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 13:20:32,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:20:32,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:20:32,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:20:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:20:32,291 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:20:32,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:20:32,297 INFO L933 BasicCegarLoop]: 0 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, 0 SdHoareTripleChecker+Invalid, 1 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 [2021-11-19 13:20:32,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:20:32,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:32,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:32,518 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4d7a29af at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-19 13:20:32,520 INFO L158 Benchmark]: Toolchain (without parser) took 3481.27ms. Allocated memory is still 144.7MB. Free memory was 108.0MB in the beginning and 110.2MB in the end (delta: -2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:20:32,521 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 144.7MB. Free memory is still 125.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:20:32,522 INFO L158 Benchmark]: CACSL2BoogieTranslator took 508.26ms. Allocated memory is still 144.7MB. Free memory was 107.7MB in the beginning and 113.6MB in the end (delta: -5.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 13:20:32,522 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.04ms. Allocated memory is still 144.7MB. Free memory was 113.6MB in the beginning and 111.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 13:20:32,523 INFO L158 Benchmark]: Boogie Preprocessor took 33.45ms. Allocated memory is still 144.7MB. Free memory was 111.2MB in the beginning and 109.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 13:20:32,524 INFO L158 Benchmark]: RCFGBuilder took 528.63ms. Allocated memory is still 144.7MB. Free memory was 109.8MB in the beginning and 93.9MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-19 13:20:32,524 INFO L158 Benchmark]: TraceAbstraction took 2332.32ms. Allocated memory is still 144.7MB. Free memory was 93.4MB in the beginning and 110.2MB in the end (delta: -16.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:20:32,530 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 144.7MB. Free memory is still 125.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 508.26ms. Allocated memory is still 144.7MB. Free memory was 107.7MB in the beginning and 113.6MB in the end (delta: -5.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.04ms. Allocated memory is still 144.7MB. Free memory was 113.6MB in the beginning and 111.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.45ms. Allocated memory is still 144.7MB. Free memory was 111.2MB in the beginning and 109.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 528.63ms. Allocated memory is still 144.7MB. Free memory was 109.8MB in the beginning and 93.9MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 2332.32ms. Allocated memory is still 144.7MB. Free memory was 93.4MB in the beginning and 110.2MB in the end (delta: -16.8MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4d7a29af de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4d7a29af: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-19 13:20:32,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/hash_fun.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs --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 0abab60f5c601fd8191c1a2aa712d4ab55460e987c7d41ca7527c2934792cc0b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:20:35,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:20:35,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:20:35,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:20:35,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:20:35,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:20:35,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:20:35,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:20:35,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:20:35,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:20:35,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:20:35,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:20:35,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:20:35,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:20:35,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:20:35,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:20:35,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:20:35,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:20:35,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:20:35,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:20:35,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:20:35,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:20:35,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:20:35,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:20:35,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:20:35,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:20:35,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:20:35,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:20:35,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:20:35,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:20:35,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:20:35,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:20:35,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:20:35,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:20:35,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:20:35,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:20:35,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:20:35,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:20:35,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:20:35,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:20:35,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:20:35,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:20:35,738 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:20:35,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:20:35,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:20:35,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:20:35,740 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:20:35,741 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:20:35,741 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:20:35,741 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:20:35,742 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:20:35,742 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:20:35,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:20:35,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:20:35,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:20:35,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:20:35,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:20:35,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:20:35,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:20:35,745 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:20:35,745 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:20:35,745 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:20:35,745 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:20:35,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:20:35,746 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:20:35,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:20:35,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:20:35,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:20:35,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:20:35,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:20:35,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:20:35,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:20:35,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:20:35,748 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:20:35,749 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:20:35,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:20:35,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:20:35,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:20:35,750 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0abab60f5c601fd8191c1a2aa712d4ab55460e987c7d41ca7527c2934792cc0b [2021-11-19 13:20:36,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:20:36,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:20:36,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:20:36,217 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:20:36,217 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:20:36,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/heap-data/hash_fun.i [2021-11-19 13:20:36,287 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/data/5fa146d2a/dac18c6f5ba44b83aea8c789211f7e79/FLAGdbcb8deb0 [2021-11-19 13:20:36,959 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:20:36,959 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/sv-benchmarks/c/heap-data/hash_fun.i [2021-11-19 13:20:36,975 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/data/5fa146d2a/dac18c6f5ba44b83aea8c789211f7e79/FLAGdbcb8deb0 [2021-11-19 13:20:37,240 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/data/5fa146d2a/dac18c6f5ba44b83aea8c789211f7e79 [2021-11-19 13:20:37,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:20:37,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:20:37,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:20:37,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:20:37,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:20:37,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:37,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cb0247f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37, skipping insertion in model container [2021-11-19 13:20:37,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:37,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:20:37,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:20:37,779 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_663229c3-7eb1-42f4-b380-0182e32f24c6/sv-benchmarks/c/heap-data/hash_fun.i[23732,23745] [2021-11-19 13:20:37,786 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:20:37,808 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:20:37,892 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_663229c3-7eb1-42f4-b380-0182e32f24c6/sv-benchmarks/c/heap-data/hash_fun.i[23732,23745] [2021-11-19 13:20:37,894 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:20:37,940 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:20:37,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37 WrapperNode [2021-11-19 13:20:37,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:20:37,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:20:37,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:20:37,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:20:37,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:37,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:38,005 INFO L137 Inliner]: procedures = 128, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-11-19 13:20:38,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:20:38,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:20:38,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:20:38,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:20:38,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:38,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:38,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:38,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:38,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:38,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:38,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:38,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:20:38,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:20:38,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:20:38,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:20:38,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (1/1) ... [2021-11-19 13:20:38,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:20:38,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:38,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:20:38,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:20:38,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:20:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:20:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:20:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:20:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:20:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:20:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:20:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:20:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:20:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:20:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:20:38,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:20:38,350 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:20:38,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:20:38,665 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:20:38,672 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:20:38,672 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 13:20:38,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:20:38 BoogieIcfgContainer [2021-11-19 13:20:38,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:20:38,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:20:38,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:20:38,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:20:38,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:20:37" (1/3) ... [2021-11-19 13:20:38,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c550d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:20:38, skipping insertion in model container [2021-11-19 13:20:38,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:20:37" (2/3) ... [2021-11-19 13:20:38,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c550d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:20:38, skipping insertion in model container [2021-11-19 13:20:38,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:20:38" (3/3) ... [2021-11-19 13:20:38,684 INFO L111 eAbstractionObserver]: Analyzing ICFG hash_fun.i [2021-11-19 13:20:38,690 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:20:38,691 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:20:38,757 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:20:38,764 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 [2021-11-19 13:20:38,764 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:20:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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) [2021-11-19 13:20:38,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 13:20:38,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:38,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:38,785 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:38,791 INFO L85 PathProgramCache]: Analyzing trace with hash 257818720, now seen corresponding path program 1 times [2021-11-19 13:20:38,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:38,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888882948] [2021-11-19 13:20:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:38,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:38,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:38,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:38,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:20:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:38,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:20:38,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:39,181 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 29 treesize of output 21 [2021-11-19 13:20:39,191 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 18 treesize of output 10 [2021-11-19 13:20:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:39,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:39,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:39,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888882948] [2021-11-19 13:20:39,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888882948] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:39,285 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:39,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 13:20:39,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21605031] [2021-11-19 13:20:39,289 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:39,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:20:39,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:39,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:20:39,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:20:39,329 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 2.0) internal successors, (8), 4 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) [2021-11-19 13:20:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:39,526 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2021-11-19 13:20:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:20:39,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-11-19 13:20:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:39,538 INFO L225 Difference]: With dead ends: 36 [2021-11-19 13:20:39,538 INFO L226 Difference]: Without dead ends: 18 [2021-11-19 13:20:39,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:20:39,555 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:39,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:20:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-19 13:20:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-19 13:20:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-11-19 13:20:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-19 13:20:39,594 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 8 [2021-11-19 13:20:39,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:39,594 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-19 13:20:39,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-19 13:20:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-19 13:20:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 13:20:39,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:39,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:39,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:39,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:20:39,811 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:39,812 INFO L85 PathProgramCache]: Analyzing trace with hash 356920873, now seen corresponding path program 1 times [2021-11-19 13:20:39,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:39,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262964889] [2021-11-19 13:20:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:39,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:39,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:39,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:39,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:20:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:39,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:20:39,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:40,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:20:40,315 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:40,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 56 [2021-11-19 13:20:40,331 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 57 treesize of output 53 [2021-11-19 13:20:40,376 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-19 13:20:40,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 58 [2021-11-19 13:20:40,395 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 44 treesize of output 40 [2021-11-19 13:20:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:40,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:41,043 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:41,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 36 [2021-11-19 13:20:41,054 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 28 treesize of output 24 [2021-11-19 13:20:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:41,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:41,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262964889] [2021-11-19 13:20:41,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262964889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:41,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1296222350] [2021-11-19 13:20:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:41,252 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:20:41,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:20:41,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:20:41,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-19 13:20:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:41,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 13:20:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:41,669 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:41,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2021-11-19 13:20:41,683 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 45 treesize of output 41 [2021-11-19 13:20:41,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-19 13:20:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:42,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:42,408 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:42,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 32 [2021-11-19 13:20:42,413 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 24 treesize of output 20 [2021-11-19 13:20:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:42,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1296222350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:42,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108429817] [2021-11-19 13:20:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:42,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:42,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:42,671 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:42,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 13:20:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:20:42,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:42,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:20:42,930 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:42,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2021-11-19 13:20:42,941 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 55 treesize of output 51 [2021-11-19 13:20:42,963 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 13:20:42,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2021-11-19 13:20:42,978 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 40 treesize of output 36 [2021-11-19 13:20:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:43,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:43,400 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:43,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 37 [2021-11-19 13:20:43,409 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 29 treesize of output 25 [2021-11-19 13:20:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:43,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108429817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:43,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:20:43,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-19 13:20:43,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798538773] [2021-11-19 13:20:43,564 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:20:43,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:20:43,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:20:43,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:20:43,567 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:43,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:43,930 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-11-19 13:20:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:20:43,931 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-19 13:20:43,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:43,932 INFO L225 Difference]: With dead ends: 47 [2021-11-19 13:20:43,932 INFO L226 Difference]: Without dead ends: 31 [2021-11-19 13:20:43,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:20:43,934 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:43,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 55 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2021-11-19 13:20:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-19 13:20:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-11-19 13:20:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 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) [2021-11-19 13:20:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-11-19 13:20:43,942 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2021-11-19 13:20:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:43,942 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-11-19 13:20:43,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:43,943 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-11-19 13:20:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 13:20:43,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:43,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:43,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-19 13:20:44,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:44,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:44,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:44,548 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 356922795, now seen corresponding path program 1 times [2021-11-19 13:20:44,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:44,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246702543] [2021-11-19 13:20:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:44,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:44,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:44,552 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:44,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:20:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:20:44,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:44,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:20:44,790 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:44,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2021-11-19 13:20:44,798 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 55 treesize of output 51 [2021-11-19 13:20:44,819 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 13:20:44,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2021-11-19 13:20:44,828 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 40 treesize of output 36 [2021-11-19 13:20:45,086 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 84 treesize of output 64 [2021-11-19 13:20:45,094 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 64 treesize of output 48 [2021-11-19 13:20:45,099 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 44 treesize of output 28 [2021-11-19 13:20:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:45,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:45,389 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:45,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2021-11-19 13:20:45,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-19 13:20:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:45,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:45,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246702543] [2021-11-19 13:20:45,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246702543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:45,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [988646523] [2021-11-19 13:20:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:45,566 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:20:45,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:20:45,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:20:45,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 13:20:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 13:20:45,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:46,014 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:46,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2021-11-19 13:20:46,021 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 45 treesize of output 41 [2021-11-19 13:20:46,033 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 42 treesize of output 38 [2021-11-19 13:20:46,387 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 86 treesize of output 66 [2021-11-19 13:20:46,392 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 66 treesize of output 34 [2021-11-19 13:20:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:46,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:46,591 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:46,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2021-11-19 13:20:46,600 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 22 treesize of output 18 [2021-11-19 13:20:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:46,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [988646523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:46,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675398351] [2021-11-19 13:20:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:46,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:46,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:46,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:46,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 13:20:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:20:46,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:46,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:20:47,061 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:47,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 56 [2021-11-19 13:20:47,073 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 57 treesize of output 53 [2021-11-19 13:20:47,094 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 13:20:47,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2021-11-19 13:20:47,102 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 40 treesize of output 36 [2021-11-19 13:20:47,255 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 84 treesize of output 64 [2021-11-19 13:20:47,259 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 64 treesize of output 48 [2021-11-19 13:20:47,263 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 44 treesize of output 28 [2021-11-19 13:20:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:47,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:47,480 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:47,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 33 [2021-11-19 13:20:47,484 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 25 treesize of output 21 [2021-11-19 13:20:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:47,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675398351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:47,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:20:47,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-19 13:20:47,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041396272] [2021-11-19 13:20:47,568 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:20:47,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:20:47,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:20:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:20:47,570 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:48,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:48,095 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-19 13:20:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:20:48,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-19 13:20:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:48,097 INFO L225 Difference]: With dead ends: 39 [2021-11-19 13:20:48,097 INFO L226 Difference]: Without dead ends: 32 [2021-11-19 13:20:48,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:20:48,099 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:48,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 63 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 15 Unchecked, 0.3s Time] [2021-11-19 13:20:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-19 13:20:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-11-19 13:20:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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) [2021-11-19 13:20:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-19 13:20:48,107 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 13 [2021-11-19 13:20:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:48,107 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-19 13:20:48,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-19 13:20:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 13:20:48,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:48,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:48,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:48,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:48,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:48,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:48,712 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:48,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1515960147, now seen corresponding path program 1 times [2021-11-19 13:20:48,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:48,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189754765] [2021-11-19 13:20:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:48,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:48,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:48,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:48,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:20:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:48,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 13:20:48,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:48,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:20:48,982 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:48,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 56 [2021-11-19 13:20:48,990 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 57 treesize of output 53 [2021-11-19 13:20:49,009 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 13:20:49,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2021-11-19 13:20:49,017 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 40 treesize of output 36 [2021-11-19 13:20:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:20:49,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:49,912 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:49,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2021-11-19 13:20:49,917 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 27 treesize of output 23 [2021-11-19 13:20:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:50,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:50,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189754765] [2021-11-19 13:20:50,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189754765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:50,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1639260211] [2021-11-19 13:20:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:50,046 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:20:50,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:20:50,048 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:20:50,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 13:20:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:50,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 13:20:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:50,492 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:50,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2021-11-19 13:20:50,498 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 45 treesize of output 41 [2021-11-19 13:20:50,507 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 46 treesize of output 42 [2021-11-19 13:20:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:20:51,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:51,454 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:51,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 32 [2021-11-19 13:20:51,458 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 24 treesize of output 20 [2021-11-19 13:20:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:51,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1639260211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:51,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742955108] [2021-11-19 13:20:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:51,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:51,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:51,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:51,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 13:20:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:51,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 13:20:51,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:51,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:20:51,826 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:51,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 53 [2021-11-19 13:20:51,830 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 54 treesize of output 50 [2021-11-19 13:20:51,847 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 13:20:51,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2021-11-19 13:20:51,857 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 40 treesize of output 36 [2021-11-19 13:20:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:52,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:52,466 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:52,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 43 [2021-11-19 13:20:52,472 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 31 [2021-11-19 13:20:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:52,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742955108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:52,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:20:52,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6, 7, 6, 6] total 19 [2021-11-19 13:20:52,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009514655] [2021-11-19 13:20:52,501 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:20:52,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 13:20:52,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 13:20:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:20:52,503 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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) [2021-11-19 13:20:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:53,438 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-19 13:20:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:20:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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 [2021-11-19 13:20:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:53,440 INFO L225 Difference]: With dead ends: 37 [2021-11-19 13:20:53,440 INFO L226 Difference]: Without dead ends: 35 [2021-11-19 13:20:53,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:20:53,442 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:53,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 70 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 13 Unchecked, 0.6s Time] [2021-11-19 13:20:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-19 13:20:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-11-19 13:20:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 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) [2021-11-19 13:20:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-19 13:20:53,451 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2021-11-19 13:20:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:53,451 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-19 13:20:53,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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) [2021-11-19 13:20:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-19 13:20:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 13:20:53,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:53,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:53,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:53,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:53,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:54,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:20:54,056 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1515962069, now seen corresponding path program 1 times [2021-11-19 13:20:54,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:54,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093016800] [2021-11-19 13:20:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:54,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:54,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:54,058 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:54,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:20:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:54,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:20:54,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:54,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:20:54,288 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:54,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 53 [2021-11-19 13:20:54,296 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 54 treesize of output 50 [2021-11-19 13:20:54,301 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 51 treesize of output 47 [2021-11-19 13:20:54,319 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-19 13:20:54,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2021-11-19 13:20:54,649 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 84 treesize of output 64 [2021-11-19 13:20:54,652 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 64 treesize of output 48 [2021-11-19 13:20:54,656 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 44 treesize of output 28 [2021-11-19 13:20:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:20:54,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:54,958 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:54,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 33 [2021-11-19 13:20:54,962 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 25 treesize of output 21 [2021-11-19 13:20:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:55,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:55,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093016800] [2021-11-19 13:20:55,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093016800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:55,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1816661199] [2021-11-19 13:20:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:55,111 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:20:55,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:20:55,112 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:20:55,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 13:20:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:20:55,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:55,501 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:55,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2021-11-19 13:20:55,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-19 13:20:55,520 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 42 treesize of output 38 [2021-11-19 13:20:56,093 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 86 treesize of output 66 [2021-11-19 13:20:56,097 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 66 treesize of output 34 [2021-11-19 13:20:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:20:56,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:56,312 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:56,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 30 [2021-11-19 13:20:56,316 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 22 treesize of output 18 [2021-11-19 13:20:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:20:56,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1816661199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:56,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605873375] [2021-11-19 13:20:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:56,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:20:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:20:56,499 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:20:56,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 13:20:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:56,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:20:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:56,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:20:56,645 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:20:56,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2021-11-19 13:20:56,650 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 55 treesize of output 51 [2021-11-19 13:20:56,669 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-19 13:20:56,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2021-11-19 13:20:56,675 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 44 treesize of output 40 [2021-11-19 13:20:56,967 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 84 treesize of output 64 [2021-11-19 13:20:56,971 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 64 treesize of output 48 [2021-11-19 13:20:56,974 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 44 treesize of output 28 [2021-11-19 13:20:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:57,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:57,260 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-19 13:20:57,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2021-11-19 13:20:57,265 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 33 treesize of output 29 [2021-11-19 13:20:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:57,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605873375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:20:57,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:20:57,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 6, 6, 6] total 16 [2021-11-19 13:20:57,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389835119] [2021-11-19 13:20:57,291 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:20:57,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 13:20:57,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:57,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 13:20:57,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:20:57,293 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 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) [2021-11-19 13:20:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:57,938 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-11-19 13:20:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:20:57,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 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 [2021-11-19 13:20:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:57,940 INFO L225 Difference]: With dead ends: 41 [2021-11-19 13:20:57,940 INFO L226 Difference]: Without dead ends: 34 [2021-11-19 13:20:57,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:20:57,942 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:57,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 70 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 17 Unchecked, 0.4s Time] [2021-11-19 13:20:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-19 13:20:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-11-19 13:20:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2021-11-19 13:20:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-19 13:20:57,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2021-11-19 13:20:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:57,949 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-19 13:20:57,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 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) [2021-11-19 13:20:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-19 13:20:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 13:20:57,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:57,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:57,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:58,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:58,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-19 13:20:58,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:20:58,551 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:58,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash -378541860, now seen corresponding path program 1 times [2021-11-19 13:20:58,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:58,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377516855] [2021-11-19 13:20:58,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:58,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:58,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:58,554 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:58,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:20:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:58,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:20:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:58,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:20:58,932 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-19 13:20:58,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 90 [2021-11-19 13:20:59,010 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-19 13:20:59,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 81 [2021-11-19 13:20:59,036 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-19 13:20:59,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 73 [2021-11-19 13:20:59,058 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-19 13:20:59,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 61 [2021-11-19 13:20:59,070 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-19 13:20:59,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2021-11-19 13:20:59,073 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:20:59,227 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-19 13:20:59,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 65 [2021-11-19 13:20:59,255 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-19 13:20:59,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 47 [2021-11-19 13:20:59,333 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:20:59,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 39 [2021-11-19 13:20:59,341 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:20:59,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-11-19 13:20:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:20:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:59,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:59,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-11-19 13:20:59,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:20:59,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-11-19 13:21:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:00,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:21:00,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377516855] [2021-11-19 13:21:00,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377516855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:21:00,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [293399661] [2021-11-19 13:21:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:00,408 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:21:00,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:21:00,412 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:21:00,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 13:21:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:00,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 13:21:00,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:21:00,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:00,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-19 13:21:00,778 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-19 13:21:00,779 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 1 case distinctions, treesize of input 95 treesize of output 71 [2021-11-19 13:21:00,808 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-19 13:21:00,808 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 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-19 13:21:00,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:00,817 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 1 case distinctions, treesize of input 59 treesize of output 46 [2021-11-19 13:21:01,122 INFO L354 Elim1Store]: treesize reduction 85, result has 3.4 percent of original size [2021-11-19 13:21:01,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 65 [2021-11-19 13:21:01,152 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-19 13:21:01,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 57 [2021-11-19 13:21:01,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:01,357 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 1 case distinctions, treesize of input 50 treesize of output 34 [2021-11-19 13:21:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:01,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:21:01,580 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:01,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-19 13:21:01,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:01,593 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-11-19 13:21:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:02,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [293399661] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:21:02,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186181299] [2021-11-19 13:21:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:02,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:21:02,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:21:02,331 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:21:02,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 13:21:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 13:21:02,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:21:02,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:21:02,566 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-19 13:21:02,566 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 1 case distinctions, treesize of input 97 treesize of output 85 [2021-11-19 13:21:02,618 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-19 13:21:02,618 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 1 case distinctions, treesize of input 86 treesize of output 74 [2021-11-19 13:21:02,639 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-19 13:21:02,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-11-19 13:21:02,666 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-19 13:21:02,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2021-11-19 13:21:02,691 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-19 13:21:02,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 44 [2021-11-19 13:21:02,693 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:21:02,988 INFO L354 Elim1Store]: treesize reduction 114, result has 13.0 percent of original size [2021-11-19 13:21:02,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 69 [2021-11-19 13:21:03,024 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-19 13:21:03,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 59 [2021-11-19 13:21:03,153 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:21:03,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 39 [2021-11-19 13:21:03,160 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:21:03,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-11-19 13:21:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:03,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:21:03,299 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:03,305 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-19 13:21:03,307 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:03,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-19 13:21:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:10,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186181299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:21:10,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:21:10,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 17 [2021-11-19 13:21:10,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441626173] [2021-11-19 13:21:10,221 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:21:10,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 13:21:10,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:21:10,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 13:21:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=218, Unknown=2, NotChecked=0, Total=272 [2021-11-19 13:21:10,228 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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) [2021-11-19 13:21:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:10,387 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-11-19 13:21:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:21:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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 [2021-11-19 13:21:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:10,393 INFO L225 Difference]: With dead ends: 43 [2021-11-19 13:21:10,393 INFO L226 Difference]: Without dead ends: 29 [2021-11-19 13:21:10,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=60, Invalid=244, Unknown=2, NotChecked=0, Total=306 [2021-11-19 13:21:10,395 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:10,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2021-11-19 13:21:10,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-19 13:21:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-19 13:21:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 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) [2021-11-19 13:21:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-11-19 13:21:10,403 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-11-19 13:21:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:10,403 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-11-19 13:21:10,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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) [2021-11-19 13:21:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-11-19 13:21:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 13:21:10,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:10,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:21:10,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:21:10,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:21:10,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:21:11,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:21:11,020 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:11,021 INFO L85 PathProgramCache]: Analyzing trace with hash -934006939, now seen corresponding path program 2 times [2021-11-19 13:21:11,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:21:11,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868250852] [2021-11-19 13:21:11,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:21:11,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:21:11,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:21:11,022 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:21:11,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:21:11,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:21:11,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:21:11,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 13:21:11,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:21:11,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:21:11,420 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 11 treesize of output 7 [2021-11-19 13:21:11,482 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:21:11,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 49 [2021-11-19 13:21:11,489 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 50 treesize of output 46 [2021-11-19 13:21:11,554 INFO L354 Elim1Store]: treesize reduction 23, result has 42.5 percent of original size [2021-11-19 13:21:11,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 62 [2021-11-19 13:21:12,212 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:12,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-11-19 13:21:12,677 INFO L354 Elim1Store]: treesize reduction 134, result has 16.3 percent of original size [2021-11-19 13:21:12,677 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 3 case distinctions, treesize of input 190 treesize of output 162 [2021-11-19 13:21:12,872 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-19 13:21:12,872 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 1 case distinctions, treesize of input 153 treesize of output 129 [2021-11-19 13:21:12,949 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-19 13:21:12,949 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 1 case distinctions, treesize of input 142 treesize of output 130 [2021-11-19 13:21:12,989 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-19 13:21:12,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 110 [2021-11-19 13:21:13,023 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-19 13:21:13,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 128 [2021-11-19 13:21:13,024 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:21:13,072 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-11-19 13:21:13,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 120 [2021-11-19 13:21:13,792 INFO L354 Elim1Store]: treesize reduction 114, result has 13.0 percent of original size [2021-11-19 13:21:13,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 107 [2021-11-19 13:21:13,874 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-19 13:21:13,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 103 [2021-11-19 13:21:13,917 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-19 13:21:13,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 71 [2021-11-19 13:21:14,654 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:21:14,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 91 [2021-11-19 13:21:14,665 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:21:14,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 68 [2021-11-19 13:21:14,677 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 62 treesize of output 46 [2021-11-19 13:21:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:14,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:21:14,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:14,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-19 13:21:15,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:15,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-11-19 13:21:15,179 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:15,180 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-11-19 13:21:15,183 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:15,184 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 223 [2021-11-19 13:21:15,194 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:15,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-11-19 13:21:32,708 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:32,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 304 [2021-11-19 13:21:32,730 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 596234 treesize of output 587530 [2021-11-19 13:21:42,979 WARN L227 SmtUtils]: Spent 9.74s on a formula simplification. DAG size of input: 464 DAG size of output: 460 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-19 13:21:43,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:21:43,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868250852] [2021-11-19 13:21:43,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 13:21:43,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1669369343] [2021-11-19 13:21:43,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:21:43,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:21:43,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:21:43,167 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:21:43,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 13:21:43,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:21:43,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:21:43,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 13:21:43,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:21:43,700 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 11 treesize of output 7 [2021-11-19 13:21:43,750 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-19 13:21:43,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 36 [2021-11-19 13:21:43,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-19 13:21:43,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-19 13:21:44,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:44,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 167 [2021-11-19 13:21:44,728 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-19 13:21:44,729 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 2 case distinctions, treesize of input 167 treesize of output 139 [2021-11-19 13:21:44,847 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-19 13:21:44,848 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 1 case distinctions, treesize of input 130 treesize of output 118 [2021-11-19 13:21:44,854 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:44,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-11-19 13:21:44,922 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-19 13:21:44,922 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 1 case distinctions, treesize of input 123 treesize of output 87 [2021-11-19 13:21:44,958 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-19 13:21:44,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 110 [2021-11-19 13:21:44,963 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:21:44,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:44,975 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 1 case distinctions, treesize of input 99 treesize of output 94 [2021-11-19 13:21:45,990 INFO L354 Elim1Store]: treesize reduction 75, result has 14.8 percent of original size [2021-11-19 13:21:45,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 153 treesize of output 110 [2021-11-19 13:21:46,046 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-19 13:21:46,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 106 [2021-11-19 13:21:46,107 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-19 13:21:46,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 70 [2021-11-19 13:21:46,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:46,861 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 1 case distinctions, treesize of input 122 treesize of output 90 [2021-11-19 13:21:46,877 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-19 13:21:46,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 66 [2021-11-19 13:21:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:21:46,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:21:51,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:51,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-19 13:21:51,406 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:51,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:21:51,412 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:51,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-19 13:21:51,417 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:51,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-19 13:21:51,428 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:21:51,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 135 [2021-11-19 13:22:13,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:13,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 302 [2021-11-19 13:22:13,661 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 18392 treesize of output 18120 [2021-11-19 13:22:13,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1376 treesize of output 1374 [2021-11-19 13:22:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:46,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1669369343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:22:46,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156038416] [2021-11-19 13:22:46,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:22:46,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:22:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:22:46,432 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:22:46,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 13:22:46,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:22:46,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:22:46,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 13:22:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:46,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:22:46,840 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:22:46,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 59 [2021-11-19 13:22:46,844 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 60 treesize of output 56 [2021-11-19 13:22:46,888 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 13:22:46,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 64 [2021-11-19 13:22:46,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-19 13:22:52,348 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-19 13:22:52,349 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 1 case distinctions, treesize of input 195 treesize of output 171 [2021-11-19 13:22:52,638 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-19 13:22:52,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 184 treesize of output 163 [2021-11-19 13:22:52,778 INFO L354 Elim1Store]: treesize reduction 77, result has 19.8 percent of original size [2021-11-19 13:22:52,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 182 [2021-11-19 13:22:52,910 INFO L354 Elim1Store]: treesize reduction 190, result has 14.0 percent of original size [2021-11-19 13:22:52,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 195 treesize of output 146 [2021-11-19 13:22:52,963 INFO L354 Elim1Store]: treesize reduction 83, result has 7.8 percent of original size [2021-11-19 13:22:52,963 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 1 case distinctions, treesize of input 148 treesize of output 124 [2021-11-19 13:22:52,965 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:22:52,995 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-19 13:22:52,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 116 [2021-11-19 13:22:53,034 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-11-19 13:22:53,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 124 [2021-11-19 13:22:53,830 INFO L354 Elim1Store]: treesize reduction 114, result has 13.0 percent of original size [2021-11-19 13:22:53,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 157 treesize of output 106 [2021-11-19 13:22:53,895 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-19 13:22:53,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 137 treesize of output 106 [2021-11-19 13:22:53,930 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-19 13:22:53,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2021-11-19 13:22:54,438 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:22:54,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 90 [2021-11-19 13:22:54,446 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:22:54,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 63 [2021-11-19 13:22:54,457 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 48 treesize of output 32 [2021-11-19 13:22:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:54,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:54,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:54,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-19 13:22:54,920 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:54,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-11-19 13:22:54,924 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:54,925 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-19 13:22:54,929 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:54,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 124 [2021-11-19 13:22:54,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:54,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:22:57,150 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_append_to_list_~node~0#1.base_22| (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (|v_ULTIMATE.start_append_to_list_~hash#1_22| (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_27 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_append_to_list_~node~0#1.base_22|)))) (bvslt (select (select (let ((.cse0 (store |c_#memory_int| |v_ULTIMATE.start_append_to_list_~node~0#1.base_22| (store (store (select |c_#memory_int| |v_ULTIMATE.start_append_to_list_~node~0#1.base_22|) (_ bv4 32) v_DerPreprocessor_25) (_ bv0 32) |v_ULTIMATE.start_append_to_list_~hash#1_22|)))) (store .cse0 |c_ULTIMATE.start_main_~#list~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~#list~0#1.offset| v_DerPreprocessor_17))) (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_append_to_list_~node~0#1.base_22| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_append_to_list_~node~0#1.base_22|) (_ bv4 32) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~#list~0#1.offset|)) (_ bv0 32) v_DerPreprocessor_26)))) (store .cse1 |c_ULTIMATE.start_main_~#list~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~#list~0#1.offset| |v_ULTIMATE.start_append_to_list_~node~0#1.base_22|))) |v_ULTIMATE.start_append_to_list_~node~0#1.base_22|) (_ bv4 32))) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_append_to_list_~node~0#1.base_22| (store (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_append_to_list_~node~0#1.base_22|) (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~#list~0#1.offset|)) (_ bv0 32) v_DerPreprocessor_27)))) (store .cse2 |c_ULTIMATE.start_main_~#list~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~#list~0#1.base|) |c_ULTIMATE.start_main_~#list~0#1.offset| (_ bv0 32)))) |v_ULTIMATE.start_append_to_list_~node~0#1.base_22|) (_ bv4 32))) (bvadd (_ bv100 32) |c_ULTIMATE.start_main_~base~0#1|)))) is different from false [2021-11-19 13:23:06,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:06,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2021-11-19 13:23:06,849 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 37035 treesize of output 36491 [2021-11-19 13:23:07,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 13:23:07,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:23:07,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-11-19 13:23:07,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279702858] [2021-11-19 13:23:07,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 13:23:07,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:23:07,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:23:07,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=703, Unknown=24, NotChecked=56, Total=930 [2021-11-19 13:23:07,699 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-11-19 13:23:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:10,785 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-11-19 13:23:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:23:10,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 23 [2021-11-19 13:23:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:10,786 INFO L225 Difference]: With dead ends: 46 [2021-11-19 13:23:10,786 INFO L226 Difference]: Without dead ends: 44 [2021-11-19 13:23:10,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 72.2s TimeCoverageRelationStatistics Valid=185, Invalid=850, Unknown=25, NotChecked=62, Total=1122 [2021-11-19 13:23:10,788 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:10,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 84 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2021-11-19 13:23:10,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-19 13:23:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2021-11-19 13:23:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 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) [2021-11-19 13:23:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-19 13:23:10,795 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 23 [2021-11-19 13:23:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:10,796 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-19 13:23:10,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-11-19 13:23:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-19 13:23:10,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 13:23:10,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:10,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:10,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:11,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:11,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:11,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:23:11,411 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:11,411 INFO L85 PathProgramCache]: Analyzing trace with hash -934005017, now seen corresponding path program 1 times [2021-11-19 13:23:11,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:11,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754812595] [2021-11-19 13:23:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:11,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:11,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:11,413 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:11,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:23:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-19 13:23:11,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:11,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:23:11,697 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:23:11,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 48 [2021-11-19 13:23:11,702 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 49 treesize of output 45 [2021-11-19 13:23:11,738 INFO L354 Elim1Store]: treesize reduction 23, result has 42.5 percent of original size [2021-11-19 13:23:11,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 61 [2021-11-19 13:23:11,783 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 11 treesize of output 7 [2021-11-19 13:23:12,168 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:12,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-11-19 13:23:12,561 INFO L354 Elim1Store]: treesize reduction 134, result has 16.3 percent of original size [2021-11-19 13:23:12,562 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 3 case distinctions, treesize of input 185 treesize of output 157 [2021-11-19 13:23:12,733 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-19 13:23:12,733 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 1 case distinctions, treesize of input 148 treesize of output 124 [2021-11-19 13:23:12,800 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-19 13:23:12,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 116 [2021-11-19 13:23:12,866 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-11-19 13:23:12,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 149 [2021-11-19 13:23:12,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:12,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 135 [2021-11-19 13:23:12,876 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:23:12,948 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-11-19 13:23:12,948 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 2 case distinctions, treesize of input 135 treesize of output 103 [2021-11-19 13:23:13,597 INFO L354 Elim1Store]: treesize reduction 114, result has 13.0 percent of original size [2021-11-19 13:23:13,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 107 [2021-11-19 13:23:13,660 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-19 13:23:13,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 103 [2021-11-19 13:23:13,689 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-19 13:23:13,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 71 [2021-11-19 13:23:14,089 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:23:14,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 87 [2021-11-19 13:23:14,101 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:23:14,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 64 [2021-11-19 13:23:14,107 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 58 treesize of output 42 [2021-11-19 13:23:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:14,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:14,305 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:14,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-19 13:23:14,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:14,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-11-19 13:23:14,448 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:14,449 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-19 13:23:14,452 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:14,452 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-19 13:23:14,455 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:14,456 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-11-19 13:23:21,350 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:21,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 299 [2021-11-19 13:23:21,363 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 73799 treesize of output 72711 [2021-11-19 13:23:22,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:22,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754812595] [2021-11-19 13:23:22,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 13:23:22,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1321941344] [2021-11-19 13:23:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:22,155 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:22,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:23:22,157 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:23:22,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 13:23:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 13:23:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:22,770 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-19 13:23:22,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 36 [2021-11-19 13:23:22,776 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 37 treesize of output 33 [2021-11-19 13:23:22,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-19 13:23:22,821 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 11 treesize of output 7 [2021-11-19 13:23:23,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:23,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-19 13:23:23,751 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-19 13:23:23,751 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 2 case distinctions, treesize of input 169 treesize of output 141 [2021-11-19 13:23:23,834 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-19 13:23:23,834 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 1 case distinctions, treesize of input 132 treesize of output 120 [2021-11-19 13:23:23,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:23,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-19 13:23:23,881 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-19 13:23:23,882 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 1 case distinctions, treesize of input 125 treesize of output 89 [2021-11-19 13:23:23,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:23,891 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 1 case distinctions, treesize of input 112 treesize of output 107 [2021-11-19 13:23:23,892 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:23:23,912 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-19 13:23:23,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 101 [2021-11-19 13:23:24,810 INFO L354 Elim1Store]: treesize reduction 85, result has 3.4 percent of original size [2021-11-19 13:23:24,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 153 treesize of output 100 [2021-11-19 13:23:24,853 INFO L354 Elim1Store]: treesize reduction 49, result has 5.8 percent of original size [2021-11-19 13:23:24,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 107 treesize of output 100 [2021-11-19 13:23:24,894 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-19 13:23:24,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 66 [2021-11-19 13:23:25,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,582 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 1 case distinctions, treesize of input 114 treesize of output 82 [2021-11-19 13:23:25,610 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-19 13:23:25,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 58 [2021-11-19 13:23:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:25,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:25,730 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-19 13:23:25,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-11-19 13:23:25,958 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-19 13:23:25,964 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-19 13:23:25,973 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:25,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-11-19 13:23:32,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:32,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 295 [2021-11-19 13:23:32,984 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 18259 treesize of output 17987 [2021-11-19 13:23:33,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 682 treesize of output 680 [2021-11-19 13:23:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:41,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1321941344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:23:41,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341897792] [2021-11-19 13:23:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:41,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:23:41,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:23:41,582 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:23:41,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 13:23:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 13:23:41,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:41,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:23:41,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 13:23:41,901 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:23:41,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 49 [2021-11-19 13:23:41,906 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 50 treesize of output 46 [2021-11-19 13:23:41,943 INFO L354 Elim1Store]: treesize reduction 23, result has 42.5 percent of original size [2021-11-19 13:23:41,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 62 [2021-11-19 13:23:44,720 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:44,721 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-11-19 13:23:45,333 INFO L354 Elim1Store]: treesize reduction 134, result has 16.3 percent of original size [2021-11-19 13:23:45,334 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 3 case distinctions, treesize of input 183 treesize of output 155 [2021-11-19 13:23:45,476 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-19 13:23:45,477 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 1 case distinctions, treesize of input 146 treesize of output 122 [2021-11-19 13:23:45,533 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-19 13:23:45,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 135 treesize of output 114 [2021-11-19 13:23:45,581 INFO L354 Elim1Store]: treesize reduction 83, result has 7.8 percent of original size [2021-11-19 13:23:45,581 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 1 case distinctions, treesize of input 145 treesize of output 125 [2021-11-19 13:23:45,621 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-11-19 13:23:45,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 128 [2021-11-19 13:23:45,622 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:23:45,650 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-19 13:23:45,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 93 [2021-11-19 13:23:46,475 INFO L354 Elim1Store]: treesize reduction 120, result has 8.4 percent of original size [2021-11-19 13:23:46,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 99 [2021-11-19 13:23:46,540 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-19 13:23:46,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 99 [2021-11-19 13:23:46,573 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-19 13:23:46,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 65 [2021-11-19 13:23:47,005 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:23:47,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 81 [2021-11-19 13:23:47,013 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:23:47,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 62 [2021-11-19 13:23:47,018 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 44 treesize of output 28 [2021-11-19 13:23:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:47,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:47,116 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:47,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-19 13:23:47,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:47,280 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-19 13:23:47,293 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:47,294 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-11-19 13:23:47,297 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:47,298 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-19 13:23:47,300 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:23:47,301 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-11-19 13:24:22,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:22,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-19 13:24:22,033 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 147851 treesize of output 145675 [2021-11-19 13:24:24,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 13:24:24,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:24:24,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-19 13:24:24,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402901373] [2021-11-19 13:24:24,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 13:24:24,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:24:24,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:24,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:24:24,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=524, Unknown=14, NotChecked=0, Total=650 [2021-11-19 13:24:24,118 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:27,281 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-19 13:24:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:24:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-19 13:24:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:27,282 INFO L225 Difference]: With dead ends: 46 [2021-11-19 13:24:27,282 INFO L226 Difference]: Without dead ends: 39 [2021-11-19 13:24:27,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=143, Invalid=654, Unknown=15, NotChecked=0, Total=812 [2021-11-19 13:24:27,284 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:27,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 77 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2021-11-19 13:24:27,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-19 13:24:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-11-19 13:24:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-19 13:24:27,292 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 23 [2021-11-19 13:24:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:27,293 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-19 13:24:27,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-19 13:24:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 13:24:27,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:27,294 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:27,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:27,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-19 13:24:27,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:27,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:24:27,895 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:27,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1206871035, now seen corresponding path program 1 times [2021-11-19 13:24:27,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:27,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141271823] [2021-11-19 13:24:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:27,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:27,897 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:27,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:24:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:28,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-19 13:24:28,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:28,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:24:28,209 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:24:28,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 48 [2021-11-19 13:24:28,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-11-19 13:24:28,260 INFO L354 Elim1Store]: treesize reduction 23, result has 42.5 percent of original size [2021-11-19 13:24:28,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 61 [2021-11-19 13:24:28,307 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 11 treesize of output 7 [2021-11-19 13:24:28,750 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:28,751 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-11-19 13:24:29,206 INFO L354 Elim1Store]: treesize reduction 134, result has 16.3 percent of original size [2021-11-19 13:24:29,206 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 3 case distinctions, treesize of input 187 treesize of output 159 [2021-11-19 13:24:29,345 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-19 13:24:29,346 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 1 case distinctions, treesize of input 150 treesize of output 126 [2021-11-19 13:24:29,420 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-19 13:24:29,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 118 [2021-11-19 13:24:29,472 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-11-19 13:24:29,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 151 [2021-11-19 13:24:29,537 INFO L354 Elim1Store]: treesize reduction 83, result has 7.8 percent of original size [2021-11-19 13:24:29,537 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 1 case distinctions, treesize of input 123 treesize of output 103 [2021-11-19 13:24:29,537 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:24:29,571 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-19 13:24:29,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 95 [2021-11-19 13:24:30,690 INFO L354 Elim1Store]: treesize reduction 120, result has 8.4 percent of original size [2021-11-19 13:24:30,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 101 [2021-11-19 13:24:30,777 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-19 13:24:30,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 108 treesize of output 101 [2021-11-19 13:24:30,812 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-19 13:24:30,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 67 [2021-11-19 13:24:31,395 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:24:31,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 87 [2021-11-19 13:24:31,404 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:24:31,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 68 [2021-11-19 13:24:31,408 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 62 treesize of output 46 [2021-11-19 13:24:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:24:31,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:31,560 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:31,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-19 13:24:31,744 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:31,745 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 132 [2021-11-19 13:24:31,748 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:31,748 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-11-19 13:24:31,751 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:31,751 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-11-19 13:24:31,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:31,755 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-11-19 13:24:43,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:43,873 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 303 [2021-11-19 13:24:43,880 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 148873 treesize of output 146697 [2021-11-19 13:24:46,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:46,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141271823] [2021-11-19 13:24:46,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 13:24:46,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1988320660] [2021-11-19 13:24:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:46,159 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:24:46,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:24:46,160 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:24:46,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 13:24:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:46,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 13:24:46,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:46,807 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 11 treesize of output 7 [2021-11-19 13:24:46,868 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-19 13:24:46,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 36 [2021-11-19 13:24:46,875 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 37 treesize of output 33 [2021-11-19 13:24:46,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-19 13:24:47,421 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:47,422 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-11-19 13:24:47,835 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-19 13:24:47,835 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 2 case distinctions, treesize of input 168 treesize of output 140 [2021-11-19 13:24:47,933 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-19 13:24:47,933 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 1 case distinctions, treesize of input 131 treesize of output 107 [2021-11-19 13:24:47,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:47,945 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 1 case distinctions, treesize of input 120 treesize of output 99 [2021-11-19 13:24:47,993 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-19 13:24:47,993 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 1 case distinctions, treesize of input 134 treesize of output 114 [2021-11-19 13:24:48,022 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-19 13:24:48,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 119 [2021-11-19 13:24:48,023 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:24:48,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:48,038 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 1 case distinctions, treesize of input 107 treesize of output 94 [2021-11-19 13:24:49,447 INFO L354 Elim1Store]: treesize reduction 85, result has 3.4 percent of original size [2021-11-19 13:24:49,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 153 treesize of output 100 [2021-11-19 13:24:49,486 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-19 13:24:49,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 87 [2021-11-19 13:24:49,518 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-19 13:24:49,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 89 [2021-11-19 13:24:50,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:50,351 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 1 case distinctions, treesize of input 122 treesize of output 90 [2021-11-19 13:24:50,372 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-19 13:24:50,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 66 [2021-11-19 13:24:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:24:50,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:50,461 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:50,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-19 13:24:50,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:50,710 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-19 13:24:50,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:50,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-19 13:24:50,719 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:50,720 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-19 13:24:50,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:50,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 135 [2021-11-19 13:24:58,517 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:24:58,518 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 299 [2021-11-19 13:24:58,525 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 148869 treesize of output 146693 [2021-11-19 13:25:00,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11294 treesize of output 11292 [2021-11-19 13:25:00,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 13:25:00,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504486973] [2021-11-19 13:25:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:00,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:25:00,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:25:00,538 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:25:00,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 13:25:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:00,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 13:25:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:00,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 13:25:00,953 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 13:25:00,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 64 [2021-11-19 13:25:00,957 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 65 treesize of output 61 [2021-11-19 13:25:00,961 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 70 treesize of output 66 [2021-11-19 13:25:01,005 INFO L354 Elim1Store]: treesize reduction 23, result has 42.5 percent of original size [2021-11-19 13:25:01,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 74 [2021-11-19 13:25:04,688 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-11-19 13:25:04,689 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 1 case distinctions, treesize of input 199 treesize of output 175 [2021-11-19 13:25:04,944 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-19 13:25:04,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 188 treesize of output 167 [2021-11-19 13:25:04,949 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:25:04,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 205 [2021-11-19 13:25:05,117 INFO L354 Elim1Store]: treesize reduction 339, result has 11.0 percent of original size [2021-11-19 13:25:05,117 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 3 case distinctions, treesize of input 205 treesize of output 161 [2021-11-19 13:25:05,168 INFO L354 Elim1Store]: treesize reduction 83, result has 7.8 percent of original size [2021-11-19 13:25:05,168 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 1 case distinctions, treesize of input 168 treesize of output 144 [2021-11-19 13:25:05,202 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-19 13:25:05,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 149 treesize of output 136 [2021-11-19 13:25:05,203 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-19 13:25:05,248 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-11-19 13:25:05,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 144 [2021-11-19 13:25:07,108 INFO L354 Elim1Store]: treesize reduction 110, result has 16.0 percent of original size [2021-11-19 13:25:07,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 181 treesize of output 126 [2021-11-19 13:25:07,188 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-19 13:25:07,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 129 treesize of output 118 [2021-11-19 13:25:07,276 INFO L354 Elim1Store]: treesize reduction 100, result has 18.7 percent of original size [2021-11-19 13:25:07,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 81 [2021-11-19 13:25:18,616 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:25:18,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 106 [2021-11-19 13:25:18,625 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:25:18,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 79 [2021-11-19 13:25:18,634 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-19 13:25:18,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2021-11-19 13:25:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:25:18,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:26,302 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:25:26,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-19 13:25:28,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:25:28,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 203 [2021-11-19 13:25:28,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:25:28,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 205 [2021-11-19 13:25:28,185 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:25:28,186 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 212 [2021-11-19 13:25:28,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:25:28,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 219 [2021-11-19 13:25:51,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:25:51,585 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 584 [2021-11-19 13:25:51,594 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 596300 treesize of output 587596 [2021-11-19 13:26:00,592 WARN L227 SmtUtils]: Spent 8.72s on a formula simplification. DAG size of input: 441 DAG size of output: 437 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-19 13:26:11,953 WARN L227 SmtUtils]: Spent 11.34s on a formula simplification. DAG size of input: 435 DAG size of output: 424 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-19 13:26:11,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-19 13:26:11,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:11,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-19 13:26:11,959 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-19 13:26:11,960 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-19 13:26:11,966 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 13:26:11,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-19 13:26:12,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:12,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:12,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:26:12,574 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:12,576 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 13:26:12,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 01:26:12 BoogieIcfgContainer [2021-11-19 13:26:12,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 13:26:12,616 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 13:26:12,616 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 13:26:12,616 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 13:26:12,617 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:20:38" (3/4) ... [2021-11-19 13:26:12,619 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 13:26:12,620 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 13:26:12,620 INFO L158 Benchmark]: Toolchain (without parser) took 335375.19ms. Allocated memory was 60.8MB in the beginning and 461.4MB in the end (delta: 400.6MB). Free memory was 37.1MB in the beginning and 248.1MB in the end (delta: -211.0MB). Peak memory consumption was 190.1MB. Max. memory is 16.1GB. [2021-11-19 13:26:12,620 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 60.8MB. Free memory was 40.9MB in the beginning and 40.9MB in the end (delta: 40.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:26:12,621 INFO L158 Benchmark]: CACSL2BoogieTranslator took 693.83ms. Allocated memory was 60.8MB in the beginning and 86.0MB in the end (delta: 25.2MB). Free memory was 36.9MB in the beginning and 61.4MB in the end (delta: -24.5MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2021-11-19 13:26:12,621 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.30ms. Allocated memory is still 86.0MB. Free memory was 61.4MB in the beginning and 59.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 13:26:12,621 INFO L158 Benchmark]: Boogie Preprocessor took 45.55ms. Allocated memory is still 86.0MB. Free memory was 59.4MB in the beginning and 57.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 13:26:12,621 INFO L158 Benchmark]: RCFGBuilder took 621.44ms. Allocated memory is still 86.0MB. Free memory was 57.8MB in the beginning and 45.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 13:26:12,622 INFO L158 Benchmark]: TraceAbstraction took 333938.80ms. Allocated memory was 86.0MB in the beginning and 461.4MB in the end (delta: 375.4MB). Free memory was 44.9MB in the beginning and 248.1MB in the end (delta: -203.2MB). Peak memory consumption was 264.0MB. Max. memory is 16.1GB. [2021-11-19 13:26:12,623 INFO L158 Benchmark]: Witness Printer took 4.24ms. Allocated memory is still 461.4MB. Free memory is still 248.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:26:12,624 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 60.8MB. Free memory was 40.9MB in the beginning and 40.9MB in the end (delta: 40.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 693.83ms. Allocated memory was 60.8MB in the beginning and 86.0MB in the end (delta: 25.2MB). Free memory was 36.9MB in the beginning and 61.4MB in the end (delta: -24.5MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.30ms. Allocated memory is still 86.0MB. Free memory was 61.4MB in the beginning and 59.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.55ms. Allocated memory is still 86.0MB. Free memory was 59.4MB in the beginning and 57.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 621.44ms. Allocated memory is still 86.0MB. Free memory was 57.8MB in the beginning and 45.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 333938.80ms. Allocated memory was 86.0MB in the beginning and 461.4MB in the end (delta: 375.4MB). Free memory was 44.9MB in the beginning and 248.1MB in the end (delta: -203.2MB). Peak memory consumption was 264.0MB. Max. memory is 16.1GB. * Witness Printer took 4.24ms. Allocated memory is still 461.4MB. Free memory is still 248.1MB. 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: 592]: 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: [L580] struct node *list = ((void *)0); [L581] int base = __VERIFIER_nondet_int(); [L582] COND TRUE __VERIFIER_nondet_int() [L583] COND TRUE base >= 0 && base <= 1000000 [L584] base = base + 0 [L585] CALL, EXPR hash_fun() [L572] return __VERIFIER_nondet_int(); [L585] RET, EXPR hash_fun() [L585] int hash = hash_fun(); [L586] COND TRUE hash > base && hash < base + 100 [L587] CALL append_to_list(&list, hash) [L574] struct node *node = malloc(sizeof(*node)); [L575] EXPR \read(**list) [L575] node->next = *list [L576] node->hash = hash [L577] *list = node [L587] RET append_to_list(&list, hash) [L582] COND TRUE __VERIFIER_nondet_int() [L583] COND TRUE base >= 0 && base <= 1000000 [L584] base = base + 0 [L585] CALL, EXPR hash_fun() [L572] return __VERIFIER_nondet_int(); [L585] RET, EXPR hash_fun() [L585] int hash = hash_fun(); [L586] COND TRUE hash > base && hash < base + 100 [L587] CALL append_to_list(&list, hash) [L574] struct node *node = malloc(sizeof(*node)); [L575] EXPR \read(**list) [L575] node->next = *list [L576] node->hash = hash [L577] *list = node [L587] RET append_to_list(&list, hash) [L582] COND TRUE __VERIFIER_nondet_int() [L583] COND TRUE base >= 0 && base <= 1000000 [L584] base = base + 0 [L585] CALL, EXPR hash_fun() [L572] return __VERIFIER_nondet_int(); [L585] RET, EXPR hash_fun() [L585] int hash = hash_fun(); [L586] COND FALSE !(hash > base && hash < base + 100) [L582] COND FALSE !(__VERIFIER_nondet_int()) [L590] \read(*list) [L590] COND TRUE \read(*list) [L591] EXPR \read(*list) [L591] EXPR list->hash [L591] EXPR list->hash >= base && list->hash < base + 100 [L591] EXPR \read(*list) [L591] EXPR list->hash [L591] EXPR list->hash >= base && list->hash < base + 100 [L591] COND FALSE !(!(list->hash >= base && list->hash < base + 100)) [L593] EXPR \read(*list) [L593] EXPR list->next [L593] list = list->next [L590] \read(*list) [L590] COND TRUE \read(*list) [L591] EXPR \read(*list) [L591] EXPR list->hash [L591] EXPR list->hash >= base && list->hash < base + 100 [L591] EXPR \read(*list) [L591] EXPR list->hash [L591] EXPR list->hash >= base && list->hash < base + 100 [L591] COND TRUE !(list->hash >= base && list->hash < base + 100) [L592] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 333.8s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 227 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 227 mSDsluCounter, 597 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 143 IncrementalHoareTripleChecker+Unchecked, 464 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 270 IncrementalHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 133 mSDtfsCounter, 270 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 729 GetRequests, 565 SyntacticMatches, 15 SemanticMatches, 149 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 142.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=7, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 167.0s InterpolantComputationTime, 361 NumberOfCodeBlocks, 361 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 610 ConstructedInterpolants, 162 QuantifiedInterpolants, 19422 SizeOfPredicates, 455 NumberOfNonLiveVariables, 1544 ConjunctsInSsa, 557 ConjunctsInUnsatCore, 39 InterpolantComputations, 2 PerfectInterpolantSequences, 46/200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-19 13:26:12,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663229c3-7eb1-42f4-b380-0182e32f24c6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN