./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V --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 cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:51:02,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:51:02,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:51:02,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:51:02,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:51:02,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:51:02,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:51:02,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:51:02,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:51:02,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:51:02,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:51:02,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:51:02,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:51:02,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:51:02,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:51:02,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:51:02,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:51:02,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:51:02,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:51:02,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:51:02,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:51:02,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:51:02,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:51:02,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:51:02,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:51:02,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:51:02,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:51:02,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:51:02,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:51:02,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:51:02,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:51:02,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:51:02,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:51:02,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:51:02,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:51:02,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:51:02,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:51:02,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:51:02,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:51:02,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:51:02,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:51:02,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:51:02,855 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:51:02,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:51:02,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:51:02,856 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:51:02,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:51:02,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:51:02,858 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:51:02,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:51:02,858 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:51:02,858 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:51:02,859 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:51:02,860 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:51:02,860 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:51:02,860 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:51:02,860 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:51:02,861 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:51:02,861 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:51:02,861 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:51:02,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:51:02,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:51:02,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:51:02,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:51:02,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:51:02,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:51:02,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:51:02,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:51:02,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:51:02,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:51:02,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:51:02,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:51:02,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:51:02,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:51:02,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:51:02,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:51:02,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:51:02,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:51:02,869 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:51:02,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:51:02,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:51:02,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:51:02,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:51:02,870 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_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 [2021-11-23 01:51:03,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:51:03,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:51:03,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:51:03,202 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:51:03,203 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:51:03,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2021-11-23 01:51:03,291 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/data/778531d70/8799dcd0ba0e4b189db0f7de3e9084ee/FLAGde5101d1c [2021-11-23 01:51:03,813 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:51:03,817 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2021-11-23 01:51:03,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/data/778531d70/8799dcd0ba0e4b189db0f7de3e9084ee/FLAGde5101d1c [2021-11-23 01:51:04,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/data/778531d70/8799dcd0ba0e4b189db0f7de3e9084ee [2021-11-23 01:51:04,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:51:04,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:51:04,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:51:04,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:51:04,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:51:04,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20330c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04, skipping insertion in model container [2021-11-23 01:51:04,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:51:04,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:51:04,437 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_661c3e1b-9c24-4885-bb06-787215c65b2f/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2021-11-23 01:51:04,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:51:04,487 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:51:04,498 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_661c3e1b-9c24-4885-bb06-787215c65b2f/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2021-11-23 01:51:04,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:51:04,523 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:51:04,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04 WrapperNode [2021-11-23 01:51:04,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:51:04,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:51:04,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:51:04,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:51:04,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,573 INFO L137 Inliner]: procedures = 14, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2021-11-23 01:51:04,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:51:04,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:51:04,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:51:04,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:51:04,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:51:04,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:51:04,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:51:04,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:51:04,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (1/1) ... [2021-11-23 01:51:04,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:51:04,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:04,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:51:04,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:51:04,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:51:04,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:51:04,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 01:51:04,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 01:51:04,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:51:04,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:51:04,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 01:51:04,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 01:51:04,803 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:51:04,805 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:51:05,055 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:51:05,118 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:51:05,118 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-23 01:51:05,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:05 BoogieIcfgContainer [2021-11-23 01:51:05,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:51:05,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:51:05,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:51:05,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:51:05,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:51:04" (1/3) ... [2021-11-23 01:51:05,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f54f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:51:05, skipping insertion in model container [2021-11-23 01:51:05,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:04" (2/3) ... [2021-11-23 01:51:05,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f54f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:51:05, skipping insertion in model container [2021-11-23 01:51:05,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:05" (3/3) ... [2021-11-23 01:51:05,130 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2021-11-23 01:51:05,135 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:51:05,135 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:51:05,183 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:51:05,190 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 [2021-11-23 01:51:05,191 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:51:05,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 01:51:05,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:05,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:05,212 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:05,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:05,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1309612569, now seen corresponding path program 1 times [2021-11-23 01:51:05,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:05,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449848165] [2021-11-23 01:51:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:05,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:05,338 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:51:05,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674816067] [2021-11-23 01:51:05,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:05,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:05,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:05,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:05,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:51:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:05,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:51:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:05,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:51:05,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449848165] [2021-11-23 01:51:05,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:51:05,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674816067] [2021-11-23 01:51:05,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674816067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:05,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:05,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:51:05,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922446568] [2021-11-23 01:51:05,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:05,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:51:05,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:51:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:05,587 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2021-11-23 01:51:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:05,675 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2021-11-23 01:51:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:51:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 [2021-11-23 01:51:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:05,686 INFO L225 Difference]: With dead ends: 27 [2021-11-23 01:51:05,686 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 01:51:05,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:51:05,693 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:05,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 01:51:05,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-11-23 01:51:05,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2021-11-23 01:51:05,727 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 8 [2021-11-23 01:51:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:05,728 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-11-23 01:51:05,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2021-11-23 01:51:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2021-11-23 01:51:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 01:51:05,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:05,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:05,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:05,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 01:51:05,955 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:05,956 INFO L85 PathProgramCache]: Analyzing trace with hash -215038707, now seen corresponding path program 1 times [2021-11-23 01:51:05,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:05,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034135871] [2021-11-23 01:51:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:05,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:05,970 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:51:05,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350688498] [2021-11-23 01:51:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:05,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:05,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:05,976 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:06,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:51:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:06,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:51:06,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:06,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:51:06,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:06,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034135871] [2021-11-23 01:51:06,112 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:51:06,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350688498] [2021-11-23 01:51:06,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350688498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:06,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:51:06,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:51:06,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783362949] [2021-11-23 01:51:06,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:06,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:51:06,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:51:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:51:06,117 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:06,203 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2021-11-23 01:51:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:51:06,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 01:51:06,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:06,207 INFO L225 Difference]: With dead ends: 37 [2021-11-23 01:51:06,207 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 01:51:06,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:51:06,211 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:06,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 01:51:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-11-23 01:51:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) 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) [2021-11-23 01:51:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2021-11-23 01:51:06,229 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 10 [2021-11-23 01:51:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:06,230 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2021-11-23 01:51:06,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2021-11-23 01:51:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 01:51:06,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:06,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:06,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:06,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:06,447 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:06,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1517764035, now seen corresponding path program 1 times [2021-11-23 01:51:06,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:06,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950462317] [2021-11-23 01:51:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:06,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:06,454 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:51:06,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076567761] [2021-11-23 01:51:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:06,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:06,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:06,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:06,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:51:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:06,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 01:51:06,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:06,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:51:06,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950462317] [2021-11-23 01:51:06,653 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:51:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076567761] [2021-11-23 01:51:06,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076567761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:51:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668251085] [2021-11-23 01:51:06,673 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 01:51:06,674 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:51:06,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:51:06,683 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:51:06,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:51:06,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:06,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:06,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:06,885 INFO L354 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2021-11-23 01:51:06,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2021-11-23 01:51:06,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:06,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:06,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:07,100 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 01:51:07,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 01:51:07,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:07,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:07,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2021-11-23 01:51:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:07,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:07,998 INFO L354 Elim1Store]: treesize reduction 130, result has 16.1 percent of original size [2021-11-23 01:51:07,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 425 treesize of output 400 [2021-11-23 01:51:08,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:08,242 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:08,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:08,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:08,337 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:08,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:08,778 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:51:09,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1668251085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:51:09,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:51:09,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2021-11-23 01:51:09,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762000805] [2021-11-23 01:51:09,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:51:09,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:51:09,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:51:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:51:09,381 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:09,806 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-23 01:51:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:51:09,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 01:51:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:09,807 INFO L225 Difference]: With dead ends: 39 [2021-11-23 01:51:09,807 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 01:51:09,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-23 01:51:09,809 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:09,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 01:51:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-11-23 01:51:09,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:09,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-11-23 01:51:09,829 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 11 [2021-11-23 01:51:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:09,830 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-11-23 01:51:09,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:09,830 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-11-23 01:51:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 01:51:09,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:09,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:09,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:10,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:10,046 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash 862012475, now seen corresponding path program 1 times [2021-11-23 01:51:10,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:10,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485879606] [2021-11-23 01:51:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:10,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:10,054 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:51:10,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962471261] [2021-11-23 01:51:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:10,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:10,062 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:10,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:51:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:51:10,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 01:51:10,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:51:10,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:51:10,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:10,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485879606] [2021-11-23 01:51:10,234 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:51:10,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962471261] [2021-11-23 01:51:10,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962471261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:51:10,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1051908422] [2021-11-23 01:51:10,238 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 01:51:10,238 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:51:10,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:51:10,239 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:51:10,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:51:10,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,353 INFO L354 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2021-11-23 01:51:10,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2021-11-23 01:51:10,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,492 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 01:51:10,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 01:51:10,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2021-11-23 01:51:10,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:10,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,034 INFO L354 Elim1Store]: treesize reduction 130, result has 16.1 percent of original size [2021-11-23 01:51:11,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 425 treesize of output 400 [2021-11-23 01:51:11,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,215 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:11,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:11,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,274 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:11,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:11,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,547 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-23 01:51:11,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 45 treesize of output 31 [2021-11-23 01:51:11,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,605 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:11,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2021-11-23 01:51:11,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,643 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:11,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:11,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,730 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-23 01:51:11,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 45 treesize of output 31 [2021-11-23 01:51:11,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,767 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:11,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:11,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,829 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-23 01:51:11,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 45 treesize of output 31 [2021-11-23 01:51:11,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,889 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:11,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:11,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,933 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:11,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:11,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:11,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,025 INFO L354 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2021-11-23 01:51:12,026 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 53 treesize of output 72 [2021-11-23 01:51:12,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:12,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,327 INFO L354 Elim1Store]: treesize reduction 76, result has 40.2 percent of original size [2021-11-23 01:51:12,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 210 [2021-11-23 01:51:12,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,546 INFO L354 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2021-11-23 01:51:12,547 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 53 treesize of output 72 [2021-11-23 01:51:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,708 INFO L354 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2021-11-23 01:51:12,709 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 53 treesize of output 72 [2021-11-23 01:51:12,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,845 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:12,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:12,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,896 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:12,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:12,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:12,960 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:12,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:12,966 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:51:13,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '518#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ (* |ULTIMATE.start_main_#t~mem11#1| 4294967295) |ULTIMATE.start_main_#t~mem10#1|) 4294967296)) 1 0)))' at error location [2021-11-23 01:51:13,961 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:51:13,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:51:13,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 01:51:13,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773627241] [2021-11-23 01:51:13,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:51:13,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 01:51:13,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 01:51:13,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-23 01:51:13,963 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:14,107 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2021-11-23 01:51:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:51:14,108 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 01:51:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:14,109 INFO L225 Difference]: With dead ends: 63 [2021-11-23 01:51:14,109 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 01:51:14,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-11-23 01:51:14,111 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:14,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 16 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 01:51:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-11-23 01:51:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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) [2021-11-23 01:51:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-11-23 01:51:14,124 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 17 [2021-11-23 01:51:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:14,124 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-11-23 01:51:14,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-11-23 01:51:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 01:51:14,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:14,126 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:14,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:14,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:14,347 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:14,347 INFO L85 PathProgramCache]: Analyzing trace with hash 883853987, now seen corresponding path program 2 times [2021-11-23 01:51:14,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:14,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076687015] [2021-11-23 01:51:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:14,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:14,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:51:14,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951937086] [2021-11-23 01:51:14,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:51:14,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:14,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:14,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:14,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:51:14,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 01:51:14,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:51:14,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 01:51:14,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:51:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 01:51:14,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:51:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 01:51:14,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:51:14,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076687015] [2021-11-23 01:51:14,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:51:14,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951937086] [2021-11-23 01:51:14,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951937086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:51:14,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1138641321] [2021-11-23 01:51:14,577 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 01:51:14,577 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:51:14,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:51:14,577 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:51:14,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:51:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,732 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 01:51:14,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 01:51:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2021-11-23 01:51:14,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:14,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2021-11-23 01:51:15,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:15,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:51:15,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,156 INFO L354 Elim1Store]: treesize reduction 130, result has 16.1 percent of original size [2021-11-23 01:51:15,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 425 treesize of output 400 [2021-11-23 01:51:15,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,289 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:15,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:15,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,340 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:15,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:15,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,615 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-23 01:51:15,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 45 treesize of output 31 [2021-11-23 01:51:15,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,663 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:15,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2021-11-23 01:51:15,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,712 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:15,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:15,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,795 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:15,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:15,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,847 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:15,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:15,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,888 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:15,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:15,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,938 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:15,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:15,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:15,985 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:15,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:16,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:16,045 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:16,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:16,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:16,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:16,129 INFO L354 Elim1Store]: treesize reduction 44, result has 49.4 percent of original size [2021-11-23 01:51:16,130 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 41 treesize of output 60 [2021-11-23 01:51:16,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:16,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:16,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:16,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:16,500 INFO L354 Elim1Store]: treesize reduction 368, result has 28.7 percent of original size [2021-11-23 01:51:16,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 181 treesize of output 256 [2021-11-23 01:51:17,944 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-23 01:51:18,761 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-23 01:51:19,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:19,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:19,648 INFO L354 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2021-11-23 01:51:19,649 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 53 treesize of output 72 [2021-11-23 01:51:19,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:19,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:19,762 INFO L354 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2021-11-23 01:51:19,763 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 53 treesize of output 72 [2021-11-23 01:51:19,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:19,947 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-23 01:51:19,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 45 treesize of output 31 [2021-11-23 01:51:19,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:20,002 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:20,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:20,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:51:20,046 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-23 01:51:20,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 39 [2021-11-23 01:51:20,054 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:51:21,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '865#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ (* |ULTIMATE.start_main_#t~mem11#1| 4294967295) |ULTIMATE.start_main_#t~mem10#1|) 4294967296)) 1 0)))' at error location [2021-11-23 01:51:21,101 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:51:21,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:51:21,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 01:51:21,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701857556] [2021-11-23 01:51:21,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:51:21,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 01:51:21,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:51:21,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 01:51:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-11-23 01:51:21,104 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:51:21,301 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2021-11-23 01:51:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:51:21,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 01:51:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:51:21,310 INFO L225 Difference]: With dead ends: 171 [2021-11-23 01:51:21,310 INFO L226 Difference]: Without dead ends: 141 [2021-11-23 01:51:21,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-11-23 01:51:21,314 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:51:21,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 16 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:51:21,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-23 01:51:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 92. [2021-11-23 01:51:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 91 states have internal predecessors, (111), 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) [2021-11-23 01:51:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2021-11-23 01:51:21,362 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 26 [2021-11-23 01:51:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:51:21,363 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2021-11-23 01:51:21,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:51:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2021-11-23 01:51:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 01:51:21,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:51:21,366 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:51:21,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 01:51:21,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:21,587 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:51:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:51:21,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1008971561, now seen corresponding path program 3 times [2021-11-23 01:51:21,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:51:21,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013114753] [2021-11-23 01:51:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:51:21,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:51:21,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:51:21,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940064566] [2021-11-23 01:51:21,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 01:51:21,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:51:21,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:51:21,599 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:51:21,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661c3e1b-9c24-4885-bb06-787215c65b2f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process