./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array13_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array13_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7 --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 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:04:01,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:04:01,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:04:01,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:04:01,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:04:01,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:04:01,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:04:01,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:04:01,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:04:01,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:04:01,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:04:01,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:04:01,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:04:01,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:04:01,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:04:01,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:04:01,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:04:01,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:04:01,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:04:01,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:04:01,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:04:01,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:04:01,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:04:01,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:04:01,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:04:01,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:04:01,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:04:01,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:04:01,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:04:01,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:04:01,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:04:01,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:04:01,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:04:01,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:04:01,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:04:01,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:04:01,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:04:01,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:04:01,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:04:01,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:04:01,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:04:01,770 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:04:01,816 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:04:01,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:04:01,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:04:01,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:04:01,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:04:01,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:04:01,826 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:04:01,826 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:04:01,826 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:04:01,826 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:04:01,827 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:04:01,828 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:04:01,828 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:04:01,828 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:04:01,828 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:04:01,829 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:04:01,829 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:04:01,829 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:04:01,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:04:01,830 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:04:01,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:04:01,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:04:01,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:04:01,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:04:01,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:04:01,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:04:01,834 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:04:01,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:04:01,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:04:01,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:04:01,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:04:01,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:04:01,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:04:01,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:04:01,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:04:01,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:04:01,837 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:04:01,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:04:01,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:04:01,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:04:01,838 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:04:01,838 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_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2021-11-25 19:04:02,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:04:02,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:04:02,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:04:02,117 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:04:02,118 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:04:02,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-patterns/array13_pattern.c [2021-11-25 19:04:02,189 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/data/1cc505a7f/a1804d0a746645ac8b03f451e2d44c93/FLAG9ac114be1 [2021-11-25 19:04:02,579 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:04:02,579 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/sv-benchmarks/c/array-patterns/array13_pattern.c [2021-11-25 19:04:02,590 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/data/1cc505a7f/a1804d0a746645ac8b03f451e2d44c93/FLAG9ac114be1 [2021-11-25 19:04:02,973 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/data/1cc505a7f/a1804d0a746645ac8b03f451e2d44c93 [2021-11-25 19:04:02,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:04:02,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:04:02,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:04:02,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:04:02,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:04:02,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:04:02" (1/1) ... [2021-11-25 19:04:02,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@351c4ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:02, skipping insertion in model container [2021-11-25 19:04:02,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:04:02" (1/1) ... [2021-11-25 19:04:03,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:04:03,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:04:03,239 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_e3c44235-894e-42ea-b344-1acfc23a39b1/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-11-25 19:04:03,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:04:03,291 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:04:03,302 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_e3c44235-894e-42ea-b344-1acfc23a39b1/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-11-25 19:04:03,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:04:03,331 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:04:03,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03 WrapperNode [2021-11-25 19:04:03,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:04:03,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:04:03,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:04:03,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:04:03,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (1/1) ... [2021-11-25 19:04:03,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (1/1) ... [2021-11-25 19:04:03,382 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2021-11-25 19:04:03,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:04:03,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:04:03,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:04:03,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:04:03,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (1/1) ... [2021-11-25 19:04:03,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (1/1) ... [2021-11-25 19:04:03,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (1/1) ... [2021-11-25 19:04:03,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (1/1) ... [2021-11-25 19:04:03,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (1/1) ... [2021-11-25 19:04:03,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (1/1) ... [2021-11-25 19:04:03,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (1/1) ... [2021-11-25 19:04:03,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:04:03,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:04:03,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:04:03,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:04:03,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (1/1) ... [2021-11-25 19:04:03,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:04:03,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:03,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:04:03,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:04:03,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:04:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:04:03,486 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:04:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:04:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:04:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:04:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:04:03,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:04:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:04:03,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:04:03,547 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:04:03,548 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:04:03,710 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:04:03,757 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:04:03,758 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 19:04:03,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:04:03 BoogieIcfgContainer [2021-11-25 19:04:03,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:04:03,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:04:03,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:04:03,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:04:03,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:04:02" (1/3) ... [2021-11-25 19:04:03,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73afba4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:04:03, skipping insertion in model container [2021-11-25 19:04:03,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:04:03" (2/3) ... [2021-11-25 19:04:03,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73afba4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:04:03, skipping insertion in model container [2021-11-25 19:04:03,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:04:03" (3/3) ... [2021-11-25 19:04:03,769 INFO L111 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2021-11-25 19:04:03,775 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:04:03,775 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:04:03,856 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:04:03,880 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 [2021-11-25 19:04:03,880 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:04:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:04:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:04:03,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:03,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:03,924 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:03,929 INFO L85 PathProgramCache]: Analyzing trace with hash 315434556, now seen corresponding path program 1 times [2021-11-25 19:04:03,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:03,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204805180] [2021-11-25 19:04:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:03,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:04,097 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:04,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740392497] [2021-11-25 19:04:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:04,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:04,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:04,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:04,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:04:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:04,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 19:04:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:04:04,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:04:04,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:04,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204805180] [2021-11-25 19:04:04,272 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:04:04,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740392497] [2021-11-25 19:04:04,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740392497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:04:04,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:04:04,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:04:04,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527469059] [2021-11-25 19:04:04,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:04:04,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:04:04,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:04:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:04:04,329 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:04:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:04,388 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2021-11-25 19:04:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:04:04,390 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 19:04:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:04,398 INFO L225 Difference]: With dead ends: 28 [2021-11-25 19:04:04,399 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 19:04:04,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:04:04,409 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:04,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:04:04,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 19:04:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 19:04:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:04:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-25 19:04:04,449 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2021-11-25 19:04:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:04,461 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-25 19:04:04,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:04:04,461 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-25 19:04:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:04:04,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:04,463 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:04,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:04,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 19:04:04,689 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:04,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash 644195277, now seen corresponding path program 1 times [2021-11-25 19:04:04,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:04,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760488617] [2021-11-25 19:04:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:04,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:04,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:04,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342815704] [2021-11-25 19:04:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:04,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:04,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:04,719 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:04,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:04:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:04,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:04:04,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:04:04,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:04:04,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:04,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760488617] [2021-11-25 19:04:04,956 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:04:04,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342815704] [2021-11-25 19:04:04,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342815704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:04:04,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:04:04,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:04:04,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450541877] [2021-11-25 19:04:04,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:04:04,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:04:04,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:04:04,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:04:04,960 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:04:05,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:05,032 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2021-11-25 19:04:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:04:05,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-25 19:04:05,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:05,034 INFO L225 Difference]: With dead ends: 37 [2021-11-25 19:04:05,034 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 19:04:05,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:04:05,036 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:05,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 21 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:04:05,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 19:04:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-25 19:04:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:04:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-25 19:04:05,045 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2021-11-25 19:04:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:05,046 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-25 19:04:05,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:04:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-25 19:04:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:04:05,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:05,048 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:05,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:05,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:05,262 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash 325873406, now seen corresponding path program 1 times [2021-11-25 19:04:05,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:05,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901194581] [2021-11-25 19:04:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:05,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:05,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:05,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514132262] [2021-11-25 19:04:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:05,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:05,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:05,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:05,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:04:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:05,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:04:05,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:04:05,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:04:05,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:05,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901194581] [2021-11-25 19:04:05,455 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:04:05,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514132262] [2021-11-25 19:04:05,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514132262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:04:05,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:04:05,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:04:05,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055006174] [2021-11-25 19:04:05,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:04:05,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:04:05,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:05,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:04:05,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:04:05,458 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:04:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:05,511 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-11-25 19:04:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:04:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-25 19:04:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:05,514 INFO L225 Difference]: With dead ends: 40 [2021-11-25 19:04:05,514 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 19:04:05,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:04:05,520 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:05,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:04:05,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 19:04:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 19:04:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:04:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-25 19:04:05,540 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 23 [2021-11-25 19:04:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:05,541 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-25 19:04:05,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:04:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-25 19:04:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:04:05,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:05,542 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:05,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:05,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:05,743 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash 377394655, now seen corresponding path program 1 times [2021-11-25 19:04:05,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242565151] [2021-11-25 19:04:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:05,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:05,757 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:05,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858001003] [2021-11-25 19:04:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:05,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:05,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:05,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:05,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:04:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:05,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 19:04:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:06,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2021-11-25 19:04:06,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-11-25 19:04:06,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 129 [2021-11-25 19:04:06,620 INFO L354 Elim1Store]: treesize reduction 334, result has 2.1 percent of original size [2021-11-25 19:04:06,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 128 treesize of output 108 [2021-11-25 19:04:06,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:04:06,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 22 [2021-11-25 19:04:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-25 19:04:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:04:07,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:14,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:14,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242565151] [2021-11-25 19:04:14,951 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:04:14,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858001003] [2021-11-25 19:04:14,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858001003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:04:14,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147748427] [2021-11-25 19:04:14,970 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:04:14,970 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:14,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:14,979 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:14,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:15,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:15,114 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:04:15,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:04:15,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:15,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:04:15,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:15,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:04:15,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:15,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:16,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:04:16,597 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:04:16,608 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:19,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '562#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:04:19,780 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:19,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:04:19,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-25 19:04:19,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234006204] [2021-11-25 19:04:19,780 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:19,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:04:19,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:04:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1097, Unknown=1, NotChecked=0, Total=1260 [2021-11-25 19:04:19,782 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:04:20,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:20,330 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-11-25 19:04:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:04:20,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-25 19:04:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:20,333 INFO L225 Difference]: With dead ends: 48 [2021-11-25 19:04:20,333 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 19:04:20,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=264, Invalid=1541, Unknown=1, NotChecked=0, Total=1806 [2021-11-25 19:04:20,335 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:20,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 105 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 134 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2021-11-25 19:04:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 19:04:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-11-25 19:04:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:04:20,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-25 19:04:20,355 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 25 [2021-11-25 19:04:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:20,355 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-25 19:04:20,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:04:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-25 19:04:20,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:04:20,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:20,358 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:20,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:20,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:20,577 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1199539594, now seen corresponding path program 2 times [2021-11-25 19:04:20,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:20,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002599616] [2021-11-25 19:04:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:20,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:20,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:20,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688691883] [2021-11-25 19:04:20,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:04:20,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:20,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:20,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:20,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:04:20,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:04:20,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:04:20,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:04:20,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:04:20,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:04:20,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:20,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002599616] [2021-11-25 19:04:20,820 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:04:20,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688691883] [2021-11-25 19:04:20,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688691883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:04:20,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292266624] [2021-11-25 19:04:20,826 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:04:20,826 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:20,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:20,827 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:20,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:20,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:20,932 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:04:20,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:04:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:21,029 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:04:21,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:04:21,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:21,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:04:21,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:21,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:21,414 INFO L354 Elim1Store]: treesize reduction 191, result has 17.3 percent of original size [2021-11-25 19:04:21,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 351 treesize of output 354 [2021-11-25 19:04:21,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:21,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:04:22,472 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2021-11-25 19:04:22,481 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:23,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '895#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:04:23,974 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:23,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:04:23,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-25 19:04:23,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843541682] [2021-11-25 19:04:23,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:23,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:04:23,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:04:23,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:04:23,976 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:04:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:24,141 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2021-11-25 19:04:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:04:24,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-25 19:04:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:24,144 INFO L225 Difference]: With dead ends: 66 [2021-11-25 19:04:24,144 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 19:04:24,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:04:24,146 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:24,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 63 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:04:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 19:04:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-11-25 19:04:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:04:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-11-25 19:04:24,156 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 26 [2021-11-25 19:04:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:24,157 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-11-25 19:04:24,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:04:24,157 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-11-25 19:04:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:04:24,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:24,158 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:24,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:24,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:24,385 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:24,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1255460819, now seen corresponding path program 3 times [2021-11-25 19:04:24,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:24,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606257366] [2021-11-25 19:04:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:24,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:24,396 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:24,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49183524] [2021-11-25 19:04:24,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:04:24,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:24,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:24,399 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:24,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:04:24,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:04:24,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:04:24,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:04:24,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:04:24,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:04:24,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:24,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606257366] [2021-11-25 19:04:24,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:04:24,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49183524] [2021-11-25 19:04:24,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49183524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:04:24,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355459081] [2021-11-25 19:04:24,640 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:04:24,640 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:24,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:24,641 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:24,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:24,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:24,705 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:04:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:04:24,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:24,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:04:24,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:24,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:04:24,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:24,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:25,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:04:25,820 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:04:25,830 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:27,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1276#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:04:27,929 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:27,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:04:27,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 19:04:27,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607007272] [2021-11-25 19:04:27,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:27,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:04:27,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:27,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:04:27,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:04:27,932 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:04:28,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:28,078 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-11-25 19:04:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:04:28,078 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2021-11-25 19:04:28,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:28,079 INFO L225 Difference]: With dead ends: 74 [2021-11-25 19:04:28,079 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 19:04:28,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:04:28,081 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:28,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 65 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:04:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 19:04:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-11-25 19:04:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:04:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-11-25 19:04:28,091 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 28 [2021-11-25 19:04:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:28,092 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-11-25 19:04:28,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:04:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-11-25 19:04:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:04:28,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:28,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:28,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:28,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:28,309 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:28,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1810866803, now seen corresponding path program 4 times [2021-11-25 19:04:28,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:28,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484157937] [2021-11-25 19:04:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:28,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:28,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:28,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57809613] [2021-11-25 19:04:28,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:04:28,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:28,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:28,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:28,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:04:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:28,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:04:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:04:28,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:04:28,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:28,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484157937] [2021-11-25 19:04:28,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:04:28,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57809613] [2021-11-25 19:04:28,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57809613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:04:28,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55861134] [2021-11-25 19:04:28,520 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:04:28,520 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:28,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:28,521 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:28,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:28,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:28,596 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:04:28,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:04:28,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:28,692 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:04:28,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:04:28,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:28,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:04:28,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:28,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:28,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:28,971 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-11-25 19:04:28,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 349 [2021-11-25 19:04:29,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:29,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:04:29,985 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2021-11-25 19:04:29,995 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:31,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1672#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:04:31,284 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:31,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:04:31,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 19:04:31,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286576696] [2021-11-25 19:04:31,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:31,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:04:31,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:31,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:04:31,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:04:31,287 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:04:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:31,441 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2021-11-25 19:04:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:04:31,444 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2021-11-25 19:04:31,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:31,445 INFO L225 Difference]: With dead ends: 106 [2021-11-25 19:04:31,445 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 19:04:31,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:04:31,447 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:31,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 90 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:04:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 19:04:31,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2021-11-25 19:04:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:04:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-11-25 19:04:31,458 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 29 [2021-11-25 19:04:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:31,458 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-11-25 19:04:31,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:04:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-11-25 19:04:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 19:04:31,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:31,460 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:31,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:31,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:31,682 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:31,682 INFO L85 PathProgramCache]: Analyzing trace with hash -983687411, now seen corresponding path program 5 times [2021-11-25 19:04:31,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:31,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176492709] [2021-11-25 19:04:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:31,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:31,708 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:31,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025212839] [2021-11-25 19:04:31,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:04:31,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:31,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:31,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:31,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:04:31,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:04:31,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:04:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:04:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:04:31,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:04:31,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:31,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176492709] [2021-11-25 19:04:31,950 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:04:31,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025212839] [2021-11-25 19:04:31,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025212839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:04:31,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638800001] [2021-11-25 19:04:31,953 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:04:31,953 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:31,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:31,954 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:31,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:31,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:32,016 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:04:32,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:04:32,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:32,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:04:32,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:32,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:04:32,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:32,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:04:33,078 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:04:33,088 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:35,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2147#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:04:35,095 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:35,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:04:35,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-25 19:04:35,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664260287] [2021-11-25 19:04:35,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:35,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:04:35,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:04:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:04:35,097 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:04:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:35,181 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2021-11-25 19:04:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:04:35,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-11-25 19:04:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:35,182 INFO L225 Difference]: With dead ends: 79 [2021-11-25 19:04:35,182 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 19:04:35,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:04:35,184 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:35,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 45 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:04:35,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 19:04:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-11-25 19:04:35,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:04:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-25 19:04:35,191 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2021-11-25 19:04:35,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:35,192 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-25 19:04:35,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:04:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-25 19:04:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:04:35,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:35,193 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:35,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:35,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:35,413 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash -285761209, now seen corresponding path program 6 times [2021-11-25 19:04:35,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:35,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472067934] [2021-11-25 19:04:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:35,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:35,422 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:35,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544273224] [2021-11-25 19:04:35,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:04:35,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:35,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:35,424 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:35,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:04:35,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:04:35,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:04:35,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:04:35,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 19:04:35,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:04:35,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:35,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472067934] [2021-11-25 19:04:35,640 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:04:35,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544273224] [2021-11-25 19:04:35,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544273224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:04:35,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1916750471] [2021-11-25 19:04:35,643 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:04:35,643 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:35,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:35,643 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:35,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:35,717 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:04:35,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:04:35,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:35,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:04:35,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:35,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:04:35,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:35,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:36,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:04:36,705 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:04:36,713 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:38,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2568#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:04:38,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:38,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:04:38,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-25 19:04:38,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723574027] [2021-11-25 19:04:38,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:38,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:04:38,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:38,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:04:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:04:38,387 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:04:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:38,479 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-11-25 19:04:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:04:38,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-11-25 19:04:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:38,480 INFO L225 Difference]: With dead ends: 59 [2021-11-25 19:04:38,481 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 19:04:38,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:04:38,482 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:38,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 33 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:04:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 19:04:38,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-25 19:04:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:04:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-25 19:04:38,489 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 34 [2021-11-25 19:04:38,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:38,489 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-25 19:04:38,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:04:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-25 19:04:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:04:38,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:38,491 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:38,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:38,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:38,708 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:38,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2004467695, now seen corresponding path program 7 times [2021-11-25 19:04:38,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:38,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442039458] [2021-11-25 19:04:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:38,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:38,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:38,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474936412] [2021-11-25 19:04:38,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:04:38,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:38,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:38,733 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:38,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:04:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:04:38,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-25 19:04:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:04:39,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 49 [2021-11-25 19:04:39,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 19:04:39,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-11-25 19:04:39,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 66 [2021-11-25 19:04:39,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:39,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 85 [2021-11-25 19:04:39,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:04:39,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 24 [2021-11-25 19:04:39,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 82 [2021-11-25 19:04:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 124 [2021-11-25 19:04:39,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 44 [2021-11-25 19:04:39,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 68 [2021-11-25 19:04:39,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 103 [2021-11-25 19:04:39,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:39,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 39 [2021-11-25 19:04:40,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 155 [2021-11-25 19:04:40,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:40,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:40,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:40,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:40,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:40,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:40,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:40,564 INFO L354 Elim1Store]: treesize reduction 572, result has 14.9 percent of original size [2021-11-25 19:04:40,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 154 treesize of output 229 [2021-11-25 19:04:41,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 31 [2021-11-25 19:04:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:41,158 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-25 19:04:41,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 42 [2021-11-25 19:04:45,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:45,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:45,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:45,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:45,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:45,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:45,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:45,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:45,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:45,147 INFO L354 Elim1Store]: treesize reduction 19, result has 77.1 percent of original size [2021-11-25 19:04:45,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 143 treesize of output 120 [2021-11-25 19:04:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:04:45,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:04:56,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:04:56,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442039458] [2021-11-25 19:04:56,163 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:04:56,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474936412] [2021-11-25 19:04:56,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474936412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:04:56,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [502193020] [2021-11-25 19:04:56,166 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:04:56,166 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:04:56,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:04:56,167 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:04:56,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:04:56,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:56,225 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:04:56,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:04:56,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:56,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:04:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:56,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:04:56,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:04:56,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:04:56,554 INFO L354 Elim1Store]: treesize reduction 191, result has 17.3 percent of original size [2021-11-25 19:04:56,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 351 treesize of output 354 [2021-11-25 19:04:56,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:04:56,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:04:56,969 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 19:04:56,972 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:59,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2926#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:04:59,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:04:59,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:04:59,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-25 19:04:59,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77823816] [2021-11-25 19:04:59,392 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:04:59,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:04:59,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:04:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:04:59,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2267, Unknown=1, NotChecked=0, Total=2550 [2021-11-25 19:04:59,394 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:04:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:04:59,588 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2021-11-25 19:04:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:04:59,588 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-11-25 19:04:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:04:59,589 INFO L225 Difference]: With dead ends: 66 [2021-11-25 19:04:59,589 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 19:04:59,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=282, Invalid=2267, Unknown=1, NotChecked=0, Total=2550 [2021-11-25 19:04:59,591 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:04:59,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2021-11-25 19:04:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 19:04:59,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-11-25 19:04:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:04:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-11-25 19:04:59,604 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 35 [2021-11-25 19:04:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:04:59,604 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-11-25 19:04:59,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:04:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-11-25 19:04:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:04:59,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:04:59,606 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:04:59,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:04:59,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:59,813 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:04:59,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:04:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1995084390, now seen corresponding path program 8 times [2021-11-25 19:04:59,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:04:59,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440669487] [2021-11-25 19:04:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:04:59,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:04:59,822 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:04:59,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999272299] [2021-11-25 19:04:59,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:04:59,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:04:59,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:04:59,829 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:04:59,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:04:59,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:04:59,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:04:59,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:04:59,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:05:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:05:00,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:05:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:05:00,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:05:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440669487] [2021-11-25 19:05:00,138 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:05:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999272299] [2021-11-25 19:05:00,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999272299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:05:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894421388] [2021-11-25 19:05:00,140 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:05:00,140 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:05:00,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:05:00,141 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:05:00,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:05:00,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:00,232 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:05:00,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:05:00,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:00,303 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:05:00,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:05:00,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:00,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:05:00,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:05:00,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:05:00,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:05:01,145 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:05:01,153 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:05:03,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3373#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:05:03,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:05:03,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:05:03,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-25 19:05:03,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320773358] [2021-11-25 19:05:03,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:05:03,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:05:03,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:05:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:05:03,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-11-25 19:05:03,093 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:05:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:05:03,435 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2021-11-25 19:05:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:05:03,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-25 19:05:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:05:03,437 INFO L225 Difference]: With dead ends: 120 [2021-11-25 19:05:03,437 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 19:05:03,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 19:05:03,439 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:05:03,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 76 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:05:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 19:05:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2021-11-25 19:05:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:05:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-11-25 19:05:03,457 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 36 [2021-11-25 19:05:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:05:03,457 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-11-25 19:05:03,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:05:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-11-25 19:05:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 19:05:03,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:05:03,459 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:05:03,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:05:03,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:05:03,665 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:05:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:05:03,665 INFO L85 PathProgramCache]: Analyzing trace with hash -886497006, now seen corresponding path program 9 times [2021-11-25 19:05:03,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:05:03,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228104967] [2021-11-25 19:05:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:05:03,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:05:03,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:05:03,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313393419] [2021-11-25 19:05:03,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:05:03,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:05:03,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:05:03,698 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:05:03,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:05:03,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:05:03,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:05:03,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:05:03,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:05:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 37 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 19:05:03,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:05:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:05:03,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:05:03,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228104967] [2021-11-25 19:05:03,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:05:03,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313393419] [2021-11-25 19:05:03,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313393419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:05:03,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553779645] [2021-11-25 19:05:03,995 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:05:03,996 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:05:03,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:05:03,996 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:05:03,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:05:04,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:04,067 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:05:04,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:05:04,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:04,165 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:05:04,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:05:04,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:04,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:05:04,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:05:04,290 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 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:05:04,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:05:05,071 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:05:05,079 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:05:06,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3997#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:05:06,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:05:06,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:05:06,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 19:05:06,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394778495] [2021-11-25 19:05:06,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:05:06,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:05:06,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:05:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:05:06,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:05:06,792 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:05:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:05:06,956 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2021-11-25 19:05:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:05:06,957 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-11-25 19:05:06,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:05:06,958 INFO L225 Difference]: With dead ends: 127 [2021-11-25 19:05:06,958 INFO L226 Difference]: Without dead ends: 110 [2021-11-25 19:05:06,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-11-25 19:05:06,960 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:05:06,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 60 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:05:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-25 19:05:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2021-11-25 19:05:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 79 states have (on average 1.240506329113924) internal successors, (98), 79 states have internal predecessors, (98), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 19:05:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2021-11-25 19:05:06,983 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 39 [2021-11-25 19:05:06,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:05:06,984 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2021-11-25 19:05:06,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:05:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2021-11-25 19:05:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 19:05:06,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:05:06,985 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:05:07,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:05:07,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:05:07,201 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:05:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:05:07,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1224798091, now seen corresponding path program 10 times [2021-11-25 19:05:07,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:05:07,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524224235] [2021-11-25 19:05:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:05:07,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:05:07,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:05:07,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277185123] [2021-11-25 19:05:07,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:05:07,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:05:07,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:05:07,224 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:05:07,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:05:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:05:07,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:05:07,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:05:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:05:07,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:05:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 19:05:07,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:05:07,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524224235] [2021-11-25 19:05:07,463 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:05:07,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277185123] [2021-11-25 19:05:07,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277185123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:05:07,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583273325] [2021-11-25 19:05:07,465 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:05:07,465 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:05:07,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:05:07,466 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:05:07,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:05:07,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:07,541 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:05:07,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:05:07,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:07,613 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:05:07,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:05:07,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:07,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 19:05:07,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:05:07,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:05:08,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:05:08,484 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:05:08,493 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:05:10,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4649#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:05:10,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:05:10,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:05:10,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 19:05:10,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467168381] [2021-11-25 19:05:10,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:05:10,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:05:10,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:05:10,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:05:10,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:05:10,310 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:05:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:05:10,500 INFO L93 Difference]: Finished difference Result 189 states and 240 transitions. [2021-11-25 19:05:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:05:10,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-11-25 19:05:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:05:10,502 INFO L225 Difference]: With dead ends: 189 [2021-11-25 19:05:10,502 INFO L226 Difference]: Without dead ends: 140 [2021-11-25 19:05:10,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-11-25 19:05:10,504 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:05:10,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 90 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:05:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-25 19:05:10,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 118. [2021-11-25 19:05:10,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 100 states have (on average 1.23) internal successors, (123), 100 states have internal predecessors, (123), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 19:05:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2021-11-25 19:05:10,531 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 40 [2021-11-25 19:05:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:05:10,531 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2021-11-25 19:05:10,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:05:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2021-11-25 19:05:10,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 19:05:10,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:05:10,536 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:05:10,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:05:10,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:05:10,745 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:05:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:05:10,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1448815184, now seen corresponding path program 1 times [2021-11-25 19:05:10,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:05:10,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624396956] [2021-11-25 19:05:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:05:10,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:05:10,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:05:10,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904874455] [2021-11-25 19:05:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:05:10,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:05:10,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:05:10,755 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:05:10,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:05:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:05:12,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-25 19:05:12,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:05:12,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2021-11-25 19:05:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-25 19:05:12,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-25 19:05:12,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 66 [2021-11-25 19:05:12,256 INFO L354 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2021-11-25 19:05:12,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 87 [2021-11-25 19:05:12,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:05:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:12,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 7 [2021-11-25 19:05:12,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 82 [2021-11-25 19:05:12,446 INFO L354 Elim1Store]: treesize reduction 297, result has 18.4 percent of original size [2021-11-25 19:05:12,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 124 [2021-11-25 19:05:12,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:12,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:12,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:12,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 29 [2021-11-25 19:05:12,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 68 [2021-11-25 19:05:12,587 INFO L354 Elim1Store]: treesize reduction 256, result has 15.5 percent of original size [2021-11-25 19:05:12,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 67 treesize of output 103 [2021-11-25 19:05:12,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:05:12,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:12,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:12,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:12,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:12,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:12,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 35 [2021-11-25 19:05:17,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 159 [2021-11-25 19:05:18,190 INFO L354 Elim1Store]: treesize reduction 852, result has 11.4 percent of original size [2021-11-25 19:05:18,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 158 treesize of output 220 [2021-11-25 19:05:18,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:18,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:18,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:18,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:18,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:18,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:18,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:18,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:18,699 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-25 19:05:18,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 51 [2021-11-25 19:05:44,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 194 [2021-11-25 19:05:45,097 INFO L354 Elim1Store]: treesize reduction 1259, result has 11.9 percent of original size [2021-11-25 19:05:45,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 193 treesize of output 292 [2021-11-25 19:05:45,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:45,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:45,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:45,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:45,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:45,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:45,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:45,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:05:45,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:45,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:05:45,260 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-25 19:05:45,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 266 treesize of output 127 [2021-11-25 19:06:03,505 INFO L354 Elim1Store]: treesize reduction 546, result has 1.3 percent of original size [2021-11-25 19:06:03,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 198 treesize of output 76 [2021-11-25 19:06:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 41 refuted. 8 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:06:04,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:13,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:13,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624396956] [2021-11-25 19:06:13,276 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:06:13,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904874455] [2021-11-25 19:06:13,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904874455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:13,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1582810324] [2021-11-25 19:06:13,277 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:06:13,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:13,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:13,278 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:13,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:13,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:13,373 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:06:13,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:06:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:13,449 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:06:13,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:06:13,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:13,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:06:13,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:06:13,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:06:13,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:06:14,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:06:14,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:06:14,445 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 16 for LOIs [2021-11-25 19:06:14,447 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:06:17,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5420#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 |#NULL.base|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.offset|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 19:06:17,779 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:06:17,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:06:17,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-25 19:06:17,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540743557] [2021-11-25 19:06:17,779 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:06:17,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 19:06:17,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:17,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 19:06:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2732, Unknown=13, NotChecked=0, Total=3080 [2021-11-25 19:06:17,782 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand has 29 states, 25 states have (on average 1.28) internal successors, (32), 22 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:06:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:17,994 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2021-11-25 19:06:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 19:06:17,995 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.28) internal successors, (32), 22 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-11-25 19:06:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:17,997 INFO L225 Difference]: With dead ends: 140 [2021-11-25 19:06:17,997 INFO L226 Difference]: Without dead ends: 127 [2021-11-25 19:06:17,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=335, Invalid=2732, Unknown=13, NotChecked=0, Total=3080 [2021-11-25 19:06:18,000 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:18,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2021-11-25 19:06:18,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-25 19:06:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-11-25 19:06:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:06:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 153 transitions. [2021-11-25 19:06:18,032 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 153 transitions. Word has length 44 [2021-11-25 19:06:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:18,032 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 153 transitions. [2021-11-25 19:06:18,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.28) internal successors, (32), 22 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:06:18,034 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 153 transitions. [2021-11-25 19:06:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 19:06:18,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:18,035 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:18,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:18,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:06:18,251 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:18,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1505026112, now seen corresponding path program 11 times [2021-11-25 19:06:18,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:18,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455057003] [2021-11-25 19:06:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:18,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:18,259 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:06:18,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112735135] [2021-11-25 19:06:18,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:06:18,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:18,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:18,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:06:19,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 19:06:19,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:06:19,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:06:19,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-25 19:06:19,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-25 19:06:19,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:19,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455057003] [2021-11-25 19:06:19,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:06:19,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112735135] [2021-11-25 19:06:19,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112735135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:06:19,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489807155] [2021-11-25 19:06:19,192 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:06:19,193 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:19,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:19,193 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:19,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:19,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:19,272 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 19:06:19,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2021-11-25 19:06:19,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:19,357 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:06:19,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:06:19,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:19,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:06:19,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:06:19,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:06:19,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:06:20,171 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2021-11-25 19:06:20,179 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:06:22,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6156#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:06:22,412 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:06:22,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:06:22,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-25 19:06:22,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550747705] [2021-11-25 19:06:22,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:06:22,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:06:22,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:22,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:06:22,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:06:22,414 INFO L87 Difference]: Start difference. First operand 125 states and 153 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:06:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:22,624 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2021-11-25 19:06:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:06:22,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-11-25 19:06:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:22,631 INFO L225 Difference]: With dead ends: 160 [2021-11-25 19:06:22,632 INFO L226 Difference]: Without dead ends: 87 [2021-11-25 19:06:22,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:06:22,633 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:22,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:06:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-25 19:06:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2021-11-25 19:06:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 69 states have internal predecessors, (82), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 19:06:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-11-25 19:06:22,650 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 43 [2021-11-25 19:06:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:22,650 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-11-25 19:06:22,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:06:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-11-25 19:06:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 19:06:22,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:22,651 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:22,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:22,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:06:22,852 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2136991845, now seen corresponding path program 12 times [2021-11-25 19:06:22,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:22,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55176827] [2021-11-25 19:06:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:22,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:22,862 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:06:22,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014291759] [2021-11-25 19:06:22,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:06:22,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:22,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:22,874 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:22,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 19:06:22,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:06:22,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:06:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:06:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-25 19:06:23,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-25 19:06:23,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:23,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55176827] [2021-11-25 19:06:23,184 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:06:23,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014291759] [2021-11-25 19:06:23,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014291759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:06:23,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73030624] [2021-11-25 19:06:23,186 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:06:23,186 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:23,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:23,187 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:23,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:23,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:23,256 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:06:23,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:06:23,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:23,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:06:23,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:23,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2021-11-25 19:06:23,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:23,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:23,585 INFO L354 Elim1Store]: treesize reduction 191, result has 17.3 percent of original size [2021-11-25 19:06:23,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 351 treesize of output 354 [2021-11-25 19:06:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 19:06:23,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 58 [2021-11-25 19:06:23,968 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 19:06:23,970 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:06:25,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6901#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= (ite (<= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) ~ARR_SIZE~0) (* ~ARR_SIZE~0 ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:06:25,148 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:06:25,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:06:25,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-25 19:06:25,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403355642] [2021-11-25 19:06:25,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:06:25,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:06:25,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:06:25,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:06:25,150 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:06:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:25,391 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2021-11-25 19:06:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:06:25,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2021-11-25 19:06:25,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:25,393 INFO L225 Difference]: With dead ends: 121 [2021-11-25 19:06:25,393 INFO L226 Difference]: Without dead ends: 87 [2021-11-25 19:06:25,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 19:06:25,395 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:25,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 74 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:06:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-25 19:06:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2021-11-25 19:06:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 69 states have internal predecessors, (80), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 19:06:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2021-11-25 19:06:25,409 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 47 [2021-11-25 19:06:25,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:25,409 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2021-11-25 19:06:25,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:06:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2021-11-25 19:06:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 19:06:25,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:25,410 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:25,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:25,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:06:25,617 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:25,617 INFO L85 PathProgramCache]: Analyzing trace with hash -377509617, now seen corresponding path program 2 times [2021-11-25 19:06:25,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:25,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051339977] [2021-11-25 19:06:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:25,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:25,632 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:06:25,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805372226] [2021-11-25 19:06:25,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:06:25,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:25,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:25,634 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:25,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 19:06:26,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 19:06:26,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:06:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-25 19:06:26,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:26,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 49 [2021-11-25 19:06:26,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-11-25 19:06:26,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-11-25 19:06:26,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 66 [2021-11-25 19:06:26,799 INFO L354 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2021-11-25 19:06:26,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 87 [2021-11-25 19:06:26,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:26,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-11-25 19:06:26,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:26,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 24 [2021-11-25 19:06:26,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 69 [2021-11-25 19:06:26,970 INFO L354 Elim1Store]: treesize reduction 182, result has 12.1 percent of original size [2021-11-25 19:06:26,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 90 [2021-11-25 19:06:26,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:26,999 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-11-25 19:06:26,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 10 [2021-11-25 19:06:27,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:27,051 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-25 19:06:27,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 10 [2021-11-25 19:06:27,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 128 [2021-11-25 19:06:27,553 INFO L354 Elim1Store]: treesize reduction 604, result has 13.8 percent of original size [2021-11-25 19:06:27,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 185 [2021-11-25 19:06:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:27,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:27,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:27,688 INFO L354 Elim1Store]: treesize reduction 162, result has 0.6 percent of original size [2021-11-25 19:06:27,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 108 treesize of output 55 [2021-11-25 19:06:27,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:27,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:27,804 INFO L354 Elim1Store]: treesize reduction 166, result has 0.6 percent of original size [2021-11-25 19:06:27,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 133 treesize of output 66 [2021-11-25 19:06:42,460 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-11-25 19:06:42,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 239 treesize of output 231 [2021-11-25 19:06:43,540 INFO L354 Elim1Store]: treesize reduction 601, result has 21.8 percent of original size [2021-11-25 19:06:43,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 110 treesize of output 235 [2021-11-25 19:06:43,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:43,872 INFO L354 Elim1Store]: treesize reduction 79, result has 51.2 percent of original size [2021-11-25 19:06:43,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 176 treesize of output 212 [2021-11-25 19:06:44,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:44,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:44,220 INFO L354 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2021-11-25 19:06:44,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 47 [2021-11-25 19:06:49,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:49,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:49,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:51,633 INFO L354 Elim1Store]: treesize reduction 1459, result has 19.0 percent of original size [2021-11-25 19:06:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 49 case distinctions, treesize of input 155 treesize of output 422 [2021-11-25 19:06:53,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:53,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:53,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:53,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:53,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:53,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:53,872 INFO L244 Elim1Store]: Index analysis took 110 ms [2021-11-25 19:06:53,877 INFO L354 Elim1Store]: treesize reduction 81, result has 1.2 percent of original size [2021-11-25 19:06:53,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 31 [2021-11-25 19:06:54,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:54,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:54,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:54,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:54,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:54,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:54,613 INFO L244 Elim1Store]: Index analysis took 209 ms [2021-11-25 19:06:54,618 INFO L354 Elim1Store]: treesize reduction 262, result has 0.4 percent of original size [2021-11-25 19:06:54,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 115 treesize of output 47 [2021-11-25 19:06:55,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:55,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:55,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:55,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:55,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:55,564 INFO L354 Elim1Store]: treesize reduction 203, result has 22.8 percent of original size [2021-11-25 19:06:55,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 101 [2021-11-25 19:06:55,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:55,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:55,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:55,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:55,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:55,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:55,877 INFO L354 Elim1Store]: treesize reduction 81, result has 1.2 percent of original size [2021-11-25 19:06:55,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 1 [2021-11-25 19:06:56,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:56,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:56,666 INFO L244 Elim1Store]: Index analysis took 195 ms [2021-11-25 19:06:56,670 INFO L354 Elim1Store]: treesize reduction 69, result has 1.4 percent of original size [2021-11-25 19:06:56,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 40 [2021-11-25 19:06:57,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 24 [2021-11-25 19:06:57,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 19 [2021-11-25 19:06:57,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 35 [2021-11-25 19:06:59,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,306 INFO L244 Elim1Store]: Index analysis took 103 ms [2021-11-25 19:06:59,400 INFO L354 Elim1Store]: treesize reduction 214, result has 13.4 percent of original size [2021-11-25 19:06:59,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 134 treesize of output 102 [2021-11-25 19:06:59,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,874 INFO L244 Elim1Store]: Index analysis took 246 ms [2021-11-25 19:07:00,068 INFO L354 Elim1Store]: treesize reduction 427, result has 17.1 percent of original size [2021-11-25 19:07:00,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 163 treesize of output 173 [2021-11-25 19:07:00,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,541 INFO L244 Elim1Store]: Index analysis took 143 ms [2021-11-25 19:07:00,718 INFO L354 Elim1Store]: treesize reduction 279, result has 23.6 percent of original size [2021-11-25 19:07:00,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 163 treesize of output 173 [2021-11-25 19:07:00,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:01,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:01,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:01,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:01,368 INFO L244 Elim1Store]: Index analysis took 464 ms [2021-11-25 19:07:01,637 INFO L354 Elim1Store]: treesize reduction 562, result has 13.7 percent of original size [2021-11-25 19:07:01,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 170 treesize of output 179 [2021-11-25 19:07:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,186 INFO L244 Elim1Store]: Index analysis took 130 ms [2021-11-25 19:07:02,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 72 [2021-11-25 19:07:02,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:02,575 INFO L244 Elim1Store]: Index analysis took 238 ms [2021-11-25 19:07:02,715 INFO L354 Elim1Store]: treesize reduction 287, result has 11.1 percent of original size [2021-11-25 19:07:02,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 141 treesize of output 110 [2021-11-25 19:07:03,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:03,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:03,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:03,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 81 [2021-11-25 19:07:03,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,944 INFO L244 Elim1Store]: Index analysis took 165 ms [2021-11-25 19:07:04,032 INFO L354 Elim1Store]: treesize reduction 274, result has 6.2 percent of original size [2021-11-25 19:07:04,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 159 treesize of output 101 [2021-11-25 19:07:04,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:04,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:04,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:04,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 68 [2021-11-25 19:07:04,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,680 INFO L244 Elim1Store]: Index analysis took 140 ms [2021-11-25 19:07:04,771 INFO L354 Elim1Store]: treesize reduction 180, result has 23.4 percent of original size [2021-11-25 19:07:04,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 152 treesize of output 133 [2021-11-25 19:07:05,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:05,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:05,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:05,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 63 [2021-11-25 19:07:06,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:06,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:06,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:06,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:06,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:06,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:06,903 INFO L244 Elim1Store]: Index analysis took 388 ms [2021-11-25 19:07:07,068 INFO L354 Elim1Store]: treesize reduction 407, result has 4.2 percent of original size [2021-11-25 19:07:07,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 153 treesize of output 105 [2021-11-25 19:07:07,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:07,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:07,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 85 [2021-11-25 19:07:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:07,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:07,851 INFO L244 Elim1Store]: Index analysis took 223 ms [2021-11-25 19:07:07,998 INFO L354 Elim1Store]: treesize reduction 142, result has 32.7 percent of original size [2021-11-25 19:07:07,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:07:08,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:08,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:08,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:08,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:08,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:08,756 INFO L354 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2021-11-25 19:07:08,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 91 treesize of output 54 [2021-11-25 19:07:09,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:09,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:09,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:09,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:09,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:09,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:09,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 44 [2021-11-25 19:07:11,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:11,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:11,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:11,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:11,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2021-11-25 19:07:12,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:12,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:12,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:12,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:12,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 83 [2021-11-25 19:07:12,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:12,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:12,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:12,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 78 [2021-11-25 19:07:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:12,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:12,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:12,934 INFO L354 Elim1Store]: treesize reduction 114, result has 0.9 percent of original size [2021-11-25 19:07:12,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 134 treesize of output 70 [2021-11-25 19:07:13,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:13,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 83 [2021-11-25 19:07:13,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,535 INFO L244 Elim1Store]: Index analysis took 208 ms [2021-11-25 19:07:13,629 INFO L354 Elim1Store]: treesize reduction 298, result has 5.7 percent of original size [2021-11-25 19:07:13,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 163 treesize of output 103 [2021-11-25 19:07:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:13,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:13,959 INFO L354 Elim1Store]: treesize reduction 112, result has 2.6 percent of original size [2021-11-25 19:07:13,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 127 treesize of output 68 [2021-11-25 19:07:14,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:14,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,271 INFO L244 Elim1Store]: Index analysis took 133 ms [2021-11-25 19:07:14,320 INFO L354 Elim1Store]: treesize reduction 150, result has 14.8 percent of original size [2021-11-25 19:07:14,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 156 treesize of output 107 [2021-11-25 19:07:14,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:14,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:14,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:14,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 37 [2021-11-25 19:07:14,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:14,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:14,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:14,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 21 [2021-11-25 19:07:21,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,165 INFO L244 Elim1Store]: Index analysis took 145 ms [2021-11-25 19:07:21,170 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-25 19:07:21,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 11 case distinctions, treesize of input 192 treesize of output 60 [2021-11-25 19:07:21,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,562 INFO L244 Elim1Store]: Index analysis took 200 ms [2021-11-25 19:07:21,569 INFO L354 Elim1Store]: treesize reduction 370, result has 0.3 percent of original size [2021-11-25 19:07:21,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 189 treesize of output 60 [2021-11-25 19:07:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,843 INFO L244 Elim1Store]: Index analysis took 188 ms [2021-11-25 19:07:21,849 INFO L354 Elim1Store]: treesize reduction 504, result has 0.2 percent of original size [2021-11-25 19:07:21,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 208 treesize of output 58 [2021-11-25 19:07:21,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,138 INFO L244 Elim1Store]: Index analysis took 197 ms [2021-11-25 19:07:22,145 INFO L354 Elim1Store]: treesize reduction 429, result has 0.2 percent of original size [2021-11-25 19:07:22,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 153 treesize of output 66 [2021-11-25 19:07:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:22,622 INFO L244 Elim1Store]: Index analysis took 274 ms [2021-11-25 19:07:22,630 INFO L354 Elim1Store]: treesize reduction 553, result has 0.2 percent of original size [2021-11-25 19:07:22,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 162 treesize of output 32 [2021-11-25 19:11:05,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-25 19:11:05,382 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-25 19:11:05,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:11:05,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051339977] [2021-11-25 19:11:05,383 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:11:05,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805372226] [2021-11-25 19:11:05,383 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-25 19:11:05,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [705893928] [2021-11-25 19:11:05,384 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:11:05,384 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:11:05,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:11:05,385 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:11:05,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:11:05,388 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:267) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 45 more [2021-11-25 19:11:05,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:05,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-25 19:11:05,411 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-25 19:11:05,411 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-25 19:11:05,417 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:11:05,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:05,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:05,626 INFO L732 BasicCegarLoop]: Path program histogram: [12, 2, 1, 1, 1] [2021-11-25 19:11:05,627 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:11:05,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:11:05 BoogieIcfgContainer [2021-11-25 19:11:05,647 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:11:05,648 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:11:05,648 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:11:05,648 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:11:05,650 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:04:03" (3/4) ... [2021-11-25 19:11:05,652 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 19:11:05,653 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:11:05,653 INFO L158 Benchmark]: Toolchain (without parser) took 422675.90ms. Allocated memory was 111.1MB in the beginning and 237.0MB in the end (delta: 125.8MB). Free memory was 76.8MB in the beginning and 131.5MB in the end (delta: -54.7MB). Peak memory consumption was 69.3MB. Max. memory is 16.1GB. [2021-11-25 19:11:05,653 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 111.1MB. Free memory was 65.3MB in the beginning and 65.3MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:11:05,654 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.08ms. Allocated memory is still 111.1MB. Free memory was 76.6MB in the beginning and 85.6MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:11:05,654 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.82ms. Allocated memory is still 111.1MB. Free memory was 85.6MB in the beginning and 84.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:11:05,654 INFO L158 Benchmark]: Boogie Preprocessor took 26.15ms. Allocated memory is still 111.1MB. Free memory was 84.3MB in the beginning and 83.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:11:05,654 INFO L158 Benchmark]: RCFGBuilder took 350.22ms. Allocated memory is still 111.1MB. Free memory was 82.6MB in the beginning and 69.6MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:11:05,655 INFO L158 Benchmark]: TraceAbstraction took 421885.12ms. Allocated memory was 111.1MB in the beginning and 237.0MB in the end (delta: 125.8MB). Free memory was 69.3MB in the beginning and 131.5MB in the end (delta: -62.2MB). Peak memory consumption was 65.7MB. Max. memory is 16.1GB. [2021-11-25 19:11:05,655 INFO L158 Benchmark]: Witness Printer took 5.08ms. Allocated memory is still 237.0MB. Free memory is still 131.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:11:05,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 111.1MB. Free memory was 65.3MB in the beginning and 65.3MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.08ms. Allocated memory is still 111.1MB. Free memory was 76.6MB in the beginning and 85.6MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.82ms. Allocated memory is still 111.1MB. Free memory was 85.6MB in the beginning and 84.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.15ms. Allocated memory is still 111.1MB. Free memory was 84.3MB in the beginning and 83.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 350.22ms. Allocated memory is still 111.1MB. Free memory was 82.6MB in the beginning and 69.6MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 421885.12ms. Allocated memory was 111.1MB in the beginning and 237.0MB in the end (delta: 125.8MB). Free memory was 69.3MB in the beginning and 131.5MB in the end (delta: -62.2MB). Peak memory consumption was 65.7MB. Max. memory is 16.1GB. * Witness Printer took 5.08ms. Allocated memory is still 237.0MB. Free memory is still 131.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L41] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L42] CALL assume_abort_if_not(ARR_SIZE > 0) [L31] COND TRUE !cond [L42] RET assume_abort_if_not(ARR_SIZE > 0) [L44] int array[ARR_SIZE][ARR_SIZE] ; [L46] int row = 0, column = 0, num = -1; [L47] signed long long sum = 0 ; [L48] int temp ; [L49] short index1,index2 ; [L51] row=0 [L51] COND TRUE row=0 && index1 < ARR_SIZE) [L31] COND TRUE !cond [L60] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L61] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L31] COND TRUE !cond [L61] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L63] EXPR (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L63] EXPR array[index1][index2] [L63] EXPR (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L63] array[index1][index2] = (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L66] temp = __VERIFIER_nondet_int() [L67] COND FALSE !(temp == 0) [L55] COND TRUE 1 [L58] index1 = __VERIFIER_nondet_short() [L59] index2 = __VERIFIER_nondet_short() [L60] CALL assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L31] COND TRUE !cond [L60] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L61] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L31] COND TRUE !cond [L61] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L63] EXPR (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L63] EXPR array[index1][index2] [L63] EXPR (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L63] array[index1][index2] = (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L66] temp = __VERIFIER_nondet_int() [L67] COND FALSE !(temp == 0) [L55] COND TRUE 1 [L58] index1 = __VERIFIER_nondet_short() [L59] index2 = __VERIFIER_nondet_short() [L60] CALL assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L31] COND TRUE !cond [L60] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L61] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L31] COND TRUE !cond [L61] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L63] EXPR (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L63] EXPR array[index1][index2] [L63] EXPR (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L63] array[index1][index2] = (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L66] temp = __VERIFIER_nondet_int() [L67] COND TRUE temp == 0 [L70] row=0 [L70] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7 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 -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2021-11-25 19:11:08,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:11:08,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:11:08,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:11:08,324 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:11:08,324 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:11:08,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-patterns/array13_pattern.c [2021-11-25 19:11:08,388 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/data/30448a698/ce42534040bd4623825dd4dd4d1e5053/FLAGdccb47f8c [2021-11-25 19:11:08,830 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:11:08,830 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/sv-benchmarks/c/array-patterns/array13_pattern.c [2021-11-25 19:11:08,844 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/data/30448a698/ce42534040bd4623825dd4dd4d1e5053/FLAGdccb47f8c [2021-11-25 19:11:09,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/data/30448a698/ce42534040bd4623825dd4dd4d1e5053 [2021-11-25 19:11:09,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:11:09,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:11:09,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:11:09,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:11:09,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:11:09,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763dec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09, skipping insertion in model container [2021-11-25 19:11:09,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:11:09,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:11:09,442 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_e3c44235-894e-42ea-b344-1acfc23a39b1/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-11-25 19:11:09,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:11:09,478 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:11:09,490 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_e3c44235-894e-42ea-b344-1acfc23a39b1/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-11-25 19:11:09,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:11:09,543 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:11:09,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09 WrapperNode [2021-11-25 19:11:09,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:11:09,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:11:09,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:11:09,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:11:09,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,609 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2021-11-25 19:11:09,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:11:09,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:11:09,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:11:09,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:11:09,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:11:09,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:11:09,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:11:09,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:11:09,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (1/1) ... [2021-11-25 19:11:09,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:11:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:09,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:11:09,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:11:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:11:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:11:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:11:09,726 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:11:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:11:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 19:11:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:11:09,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:11:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:11:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 19:11:09,845 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:11:09,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:11:10,337 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:11:10,343 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:11:10,343 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 19:11:10,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:11:10 BoogieIcfgContainer [2021-11-25 19:11:10,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:11:10,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:11:10,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:11:10,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:11:10,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:11:09" (1/3) ... [2021-11-25 19:11:10,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c9cf63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:11:10, skipping insertion in model container [2021-11-25 19:11:10,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:11:09" (2/3) ... [2021-11-25 19:11:10,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c9cf63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:11:10, skipping insertion in model container [2021-11-25 19:11:10,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:11:10" (3/3) ... [2021-11-25 19:11:10,358 INFO L111 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2021-11-25 19:11:10,363 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:11:10,363 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:11:10,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:11:10,431 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 [2021-11-25 19:11:10,432 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:11:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:11:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:11:10,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:10,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:10,464 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:11:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:10,470 INFO L85 PathProgramCache]: Analyzing trace with hash -152131175, now seen corresponding path program 1 times [2021-11-25 19:11:10,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:10,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974916199] [2021-11-25 19:11:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:10,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:10,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:10,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:10,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:11:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 19:11:10,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:11:10,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:10,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:10,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974916199] [2021-11-25 19:11:10,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974916199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:10,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:10,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:11:10,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137029742] [2021-11-25 19:11:10,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:10,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:11:10,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:11:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:11:10,762 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:11:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:10,782 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2021-11-25 19:11:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:11:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-25 19:11:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:10,790 INFO L225 Difference]: With dead ends: 59 [2021-11-25 19:11:10,791 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:11:10,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:11:10,797 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:10,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:11:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:11:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-25 19:11:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:11:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-25 19:11:10,830 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2021-11-25 19:11:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:10,831 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-25 19:11:10,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:11:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-25 19:11:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:11:10,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:10,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:10,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:11,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:11,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:11:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2136147464, now seen corresponding path program 1 times [2021-11-25 19:11:11,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:11,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746938744] [2021-11-25 19:11:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:11,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:11,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:11,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:11,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:11:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:11,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:11:11,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:11:11,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:11,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:11,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746938744] [2021-11-25 19:11:11,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746938744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:11,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:11,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:11:11,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050944904] [2021-11-25 19:11:11,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:11,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:11:11,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:11:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:11:11,591 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:11:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:11,605 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-11-25 19:11:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:11:11,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-11-25 19:11:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:11,607 INFO L225 Difference]: With dead ends: 51 [2021-11-25 19:11:11,608 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 19:11:11,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:11:11,610 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:11,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2021-11-25 19:11:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 19:11:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-25 19:11:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:11:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-25 19:11:11,620 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 28 [2021-11-25 19:11:11,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:11,621 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-25 19:11:11,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:11:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-25 19:11:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 19:11:11,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:11,623 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:11,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:11,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:11,836 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:11:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:11,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1062070342, now seen corresponding path program 1 times [2021-11-25 19:11:11,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:11,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912936504] [2021-11-25 19:11:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:11,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:11,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:11,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:11,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:11:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:11:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:11:12,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:12,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:12,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912936504] [2021-11-25 19:11:12,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912936504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:12,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:11:12,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:11:12,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135521446] [2021-11-25 19:11:12,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:12,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:11:12,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:12,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:11:12,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:11:12,394 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:11:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:12,409 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2021-11-25 19:11:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:11:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-25 19:11:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:12,410 INFO L225 Difference]: With dead ends: 56 [2021-11-25 19:11:12,410 INFO L226 Difference]: Without dead ends: 33 [2021-11-25 19:11:12,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:11:12,412 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:12,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 72 Unchecked, 0.0s Time] [2021-11-25 19:11:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-25 19:11:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-25 19:11:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:11:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-11-25 19:11:12,421 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 31 [2021-11-25 19:11:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:12,422 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-11-25 19:11:12,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:11:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-11-25 19:11:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 19:11:12,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:12,424 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:12,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:12,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:11:12,633 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:11:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:12,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1662239748, now seen corresponding path program 1 times [2021-11-25 19:11:12,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:12,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154540616] [2021-11-25 19:11:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:12,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:12,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:12,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:11:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:12,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:11:12,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:11:13,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:13,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:13,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154540616] [2021-11-25 19:11:13,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154540616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:11:13,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1577753109] [2021-11-25 19:11:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:13,755 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:11:13,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:11:13,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:11:13,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-25 19:11:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:13,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:11:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:11:14,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:11:14,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1577753109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000411420] [2021-11-25 19:11:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:14,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:14,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:14,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:11:14,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:11:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:14,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:11:14,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:11:15,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:11:15,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000411420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:15,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 19:11:15,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7, 10, 7] total 25 [2021-11-25 19:11:15,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774215706] [2021-11-25 19:11:15,492 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 19:11:15,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 19:11:15,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:11:15,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 19:11:15,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:11:15,495 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-25 19:11:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:17,437 INFO L93 Difference]: Finished difference Result 121 states and 154 transitions. [2021-11-25 19:11:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-25 19:11:17,438 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 33 [2021-11-25 19:11:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:17,441 INFO L225 Difference]: With dead ends: 121 [2021-11-25 19:11:17,441 INFO L226 Difference]: Without dead ends: 102 [2021-11-25 19:11:17,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 139 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=438, Invalid=1724, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 19:11:17,445 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 260 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:17,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 156 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 184 Invalid, 0 Unknown, 177 Unchecked, 0.8s Time] [2021-11-25 19:11:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-25 19:11:17,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 55. [2021-11-25 19:11:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:11:17,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2021-11-25 19:11:17,460 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2021-11-25 19:11:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:17,460 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2021-11-25 19:11:17,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-25 19:11:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2021-11-25 19:11:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:11:17,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:17,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:17,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:17,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-25 19:11:17,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:18,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:18,074 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:11:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1967381381, now seen corresponding path program 1 times [2021-11-25 19:11:18,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:11:18,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857265753] [2021-11-25 19:11:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:18,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:11:18,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:11:18,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:11:18,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:11:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:18,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 19:11:18,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:18,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:11:20,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:11:20,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:11:20,047 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 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-25 19:11:20,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-25 19:11:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:11:20,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:34,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:11:34,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857265753] [2021-11-25 19:11:34,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857265753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:11:34,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [734626286] [2021-11-25 19:11:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:34,689 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:11:34,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:11:34,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:11:34,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 19:11:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:34,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:11:34,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:38,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:11:43,990 INFO L354 Elim1Store]: treesize reduction 65, result has 4.4 percent of original size [2021-11-25 19:11:43,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 26 [2021-11-25 19:11:50,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-25 19:11:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:11:50,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:56,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [734626286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:11:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171059359] [2021-11-25 19:11:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:56,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:56,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:56,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:11:56,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:11:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:57,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 19:11:57,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:01,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:12:03,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:03,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:12:03,413 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 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-25 19:12:03,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-25 19:12:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:12:03,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:07,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171059359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:12:07,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:12:07,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 20] total 41 [2021-11-25 19:12:07,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269890481] [2021-11-25 19:12:07,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:07,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 19:12:07,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:07,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 19:12:07,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2057, Unknown=1, NotChecked=0, Total=2450 [2021-11-25 19:12:07,657 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 41 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 33 states have internal predecessors, (58), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-25 19:12:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:09,699 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2021-11-25 19:12:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 19:12:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 33 states have internal predecessors, (58), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2021-11-25 19:12:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:09,701 INFO L225 Difference]: With dead ends: 90 [2021-11-25 19:12:09,701 INFO L226 Difference]: Without dead ends: 86 [2021-11-25 19:12:09,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 93 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=419, Invalid=2336, Unknown=1, NotChecked=0, Total=2756 [2021-11-25 19:12:09,704 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:09,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 216 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 120 Unchecked, 0.6s Time] [2021-11-25 19:12:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-25 19:12:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2021-11-25 19:12:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 19:12:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-11-25 19:12:09,721 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 38 [2021-11-25 19:12:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:09,722 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-11-25 19:12:09,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 33 states have internal predecessors, (58), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-25 19:12:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-11-25 19:12:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 19:12:09,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:09,724 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:09,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-25 19:12:09,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:10,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:10,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:10,327 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:12:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash -291961609, now seen corresponding path program 1 times [2021-11-25 19:12:10,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:10,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106278018] [2021-11-25 19:12:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:10,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:10,330 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:10,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 19:12:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:10,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:12:10,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:12:10,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:12:11,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106278018] [2021-11-25 19:12:11,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106278018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:11,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2124786353] [2021-11-25 19:12:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:11,509 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:11,511 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:11,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 19:12:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:11,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:12:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:12:11,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:12:12,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2124786353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:12,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349748893] [2021-11-25 19:12:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:12,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:12,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:12,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:12,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:12:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:12,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:12:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:12:12,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:12:13,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349748893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:13,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:13,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 10, 9, 7, 7] total 30 [2021-11-25 19:12:13,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176584779] [2021-11-25 19:12:13,031 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:13,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-25 19:12:13,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:13,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-25 19:12:13,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2021-11-25 19:12:13,033 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 19:12:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:15,374 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2021-11-25 19:12:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 19:12:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 40 [2021-11-25 19:12:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:15,380 INFO L225 Difference]: With dead ends: 132 [2021-11-25 19:12:15,380 INFO L226 Difference]: Without dead ends: 111 [2021-11-25 19:12:15,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=427, Invalid=1553, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 19:12:15,383 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:15,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 132 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 309 Invalid, 0 Unknown, 113 Unchecked, 1.2s Time] [2021-11-25 19:12:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-25 19:12:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2021-11-25 19:12:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 89 states have internal predecessors, (110), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 19:12:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2021-11-25 19:12:15,401 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 40 [2021-11-25 19:12:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:15,401 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2021-11-25 19:12:15,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 19:12:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2021-11-25 19:12:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 19:12:15,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:15,404 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:15,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:15,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-25 19:12:15,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:16,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:16,005 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:12:16,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:16,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2039013503, now seen corresponding path program 2 times [2021-11-25 19:12:16,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:16,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315560354] [2021-11-25 19:12:16,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:16,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:16,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:16,007 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:16,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 19:12:16,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:16,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:12:16,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:12:16,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:12:17,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:17,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315560354] [2021-11-25 19:12:17,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315560354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:17,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1401430597] [2021-11-25 19:12:17,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:17,084 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:17,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:17,089 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:17,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-25 19:12:17,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:17,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:17,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:12:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:12:18,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:12:18,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1401430597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961672325] [2021-11-25 19:12:18,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:18,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:18,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:18,531 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:18,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:12:18,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:18,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:18,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:12:18,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:12:19,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:12:19,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961672325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:19,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:19,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8, 7, 7, 9] total 40 [2021-11-25 19:12:19,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117479966] [2021-11-25 19:12:19,550 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:19,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-25 19:12:19,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:19,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-25 19:12:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 19:12:19,552 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-25 19:12:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:27,985 INFO L93 Difference]: Finished difference Result 252 states and 318 transitions. [2021-11-25 19:12:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-25 19:12:27,986 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 41 [2021-11-25 19:12:27,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:27,987 INFO L225 Difference]: With dead ends: 252 [2021-11-25 19:12:27,987 INFO L226 Difference]: Without dead ends: 145 [2021-11-25 19:12:27,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1116, Invalid=6024, Unknown=0, NotChecked=0, Total=7140 [2021-11-25 19:12:27,991 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 364 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:27,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 324 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 541 Invalid, 0 Unknown, 283 Unchecked, 2.4s Time] [2021-11-25 19:12:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-25 19:12:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 116. [2021-11-25 19:12:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 108 states have (on average 1.2777777777777777) internal successors, (138), 108 states have internal predecessors, (138), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:12:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2021-11-25 19:12:28,012 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 41 [2021-11-25 19:12:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:28,012 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2021-11-25 19:12:28,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-25 19:12:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2021-11-25 19:12:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 19:12:28,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:28,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:28,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:28,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-25 19:12:28,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-25 19:12:28,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:28,621 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:12:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1355380159, now seen corresponding path program 3 times [2021-11-25 19:12:28,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:28,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842000269] [2021-11-25 19:12:28,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:12:28,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:28,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:28,623 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:28,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:12:28,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:12:28,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:28,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:12:28,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:12:29,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:30,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:30,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842000269] [2021-11-25 19:12:30,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842000269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:12:30,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1599005136] [2021-11-25 19:12:30,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:12:30,282 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:30,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:30,283 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:30,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 19:12:30,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:12:30,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:30,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:12:30,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:12:31,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:31,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1599005136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:12:31,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672733799] [2021-11-25 19:12:31,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:12:31,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:31,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:31,449 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:31,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:12:31,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:12:31,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:31,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:31,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:12:32,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:32,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672733799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:12:32,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:12:32,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 23 [2021-11-25 19:12:32,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980027765] [2021-11-25 19:12:32,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:32,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 19:12:32,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:32,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 19:12:32,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:12:32,876 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand has 23 states, 21 states have (on average 2.857142857142857) internal successors, (60), 17 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 19:12:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:32,989 INFO L93 Difference]: Finished difference Result 196 states and 244 transitions. [2021-11-25 19:12:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:12:33,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.857142857142857) internal successors, (60), 17 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-11-25 19:12:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:33,002 INFO L225 Difference]: With dead ends: 196 [2021-11-25 19:12:33,002 INFO L226 Difference]: Without dead ends: 188 [2021-11-25 19:12:33,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:12:33,003 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:33,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 165 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-11-25 19:12:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-25 19:12:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 127. [2021-11-25 19:12:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.2627118644067796) internal successors, (149), 118 states have internal predecessors, (149), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:12:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 159 transitions. [2021-11-25 19:12:33,041 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 159 transitions. Word has length 45 [2021-11-25 19:12:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:33,041 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 159 transitions. [2021-11-25 19:12:33,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.857142857142857) internal successors, (60), 17 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 19:12:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 159 transitions. [2021-11-25 19:12:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 19:12:33,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:33,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:33,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:33,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:33,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-25 19:12:33,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:33,645 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:12:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:33,645 INFO L85 PathProgramCache]: Analyzing trace with hash 768574145, now seen corresponding path program 2 times [2021-11-25 19:12:33,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:33,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619556639] [2021-11-25 19:12:33,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:33,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:33,646 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:33,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 19:12:33,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:33,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:33,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:12:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:12:34,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:12:34,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:12:34,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619556639] [2021-11-25 19:12:34,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619556639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:34,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [36689362] [2021-11-25 19:12:34,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:34,755 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:12:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:12:34,756 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:12:34,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-25 19:12:34,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:34,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:34,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:12:34,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:12:35,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:12:36,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [36689362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:36,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117375563] [2021-11-25 19:12:36,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:12:36,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:36,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:36,017 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:36,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 19:12:36,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:12:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:36,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:12:36,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:12:36,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:12:36,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117375563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:36,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:12:36,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 11, 9, 7, 9] total 39 [2021-11-25 19:12:36,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510952038] [2021-11-25 19:12:36,965 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:12:36,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-25 19:12:36,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:12:36,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-25 19:12:36,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1208, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:12:36,968 INFO L87 Difference]: Start difference. First operand 127 states and 159 transitions. Second operand has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 39 states have internal predecessors, (125), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-25 19:12:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:37,612 INFO L93 Difference]: Finished difference Result 209 states and 264 transitions. [2021-11-25 19:12:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 19:12:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 39 states have internal predecessors, (125), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 45 [2021-11-25 19:12:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:37,621 INFO L225 Difference]: With dead ends: 209 [2021-11-25 19:12:37,621 INFO L226 Difference]: Without dead ends: 100 [2021-11-25 19:12:37,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 227 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=398, Invalid=1764, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 19:12:37,623 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:37,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 191 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2021-11-25 19:12:37,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-25 19:12:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2021-11-25 19:12:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:12:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2021-11-25 19:12:37,634 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 45 [2021-11-25 19:12:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:37,635 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2021-11-25 19:12:37,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 39 states have internal predecessors, (125), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-25 19:12:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2021-11-25 19:12:37,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:12:37,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:37,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:37,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:37,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-25 19:12:38,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:38,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:12:38,240 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:12:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash -4709032, now seen corresponding path program 4 times [2021-11-25 19:12:38,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:12:38,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345567744] [2021-11-25 19:12:38,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:12:38,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:12:38,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:12:38,242 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:12:38,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 19:12:38,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:12:38,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:12:38,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-25 19:12:38,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:38,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:12:39,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:39,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-25 19:12:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:40,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:40,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:12:40,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-25 19:12:40,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:40,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:40,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:12:40,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 19:12:42,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:42,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:42,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:42,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:42,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:42,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:12:42,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2021-11-25 19:12:47,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:47,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:47,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:47,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:47,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:47,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:47,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:47,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:12:47,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:12:47,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:12:47,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 23 [2021-11-25 19:12:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:12:50,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:55,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:13:55,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345567744] [2021-11-25 19:13:55,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345567744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:13:55,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1669041369] [2021-11-25 19:13:55,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:13:55,846 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:13:55,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:13:55,848 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:13:55,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 19:13:57,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:13:57,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:13:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 19:13:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:14:03,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:14:06,231 INFO L354 Elim1Store]: treesize reduction 58, result has 19.4 percent of original size [2021-11-25 19:14:06,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-25 19:14:13,778 INFO L354 Elim1Store]: treesize reduction 156, result has 17.9 percent of original size [2021-11-25 19:14:13,778 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 55 treesize of output 57 [2021-11-25 19:14:15,278 INFO L354 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2021-11-25 19:14:15,278 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 34 treesize of output 36 [2021-11-25 19:14:30,004 INFO L354 Elim1Store]: treesize reduction 184, result has 14.0 percent of original size [2021-11-25 19:14:30,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 58 [2021-11-25 19:16:12,412 INFO L354 Elim1Store]: treesize reduction 178, result has 1.7 percent of original size [2021-11-25 19:16:12,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 23 [2021-11-25 19:16:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:16:13,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:20,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1669041369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:16:20,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547949488] [2021-11-25 19:16:20,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:16:20,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:20,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:16:20,353 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:16:20,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 19:16:20,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:16:20,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:20,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-25 19:16:20,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:20,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:16:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:21,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-25 19:16:21,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:21,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:21,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:16:21,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-25 19:16:21,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:21,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:21,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:21,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:16:21,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 19:16:23,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:23,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:23,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:23,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:23,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:23,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:23,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:16:23,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2021-11-25 19:16:26,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:26,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:26,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:26,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:26,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:26,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:26,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:26,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:16:26,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:16:26,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 23 [2021-11-25 19:16:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:16:28,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:35,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547949488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:16:35,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:16:35,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30, 33] total 58 [2021-11-25 19:16:35,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126067158] [2021-11-25 19:16:35,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:16:35,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-25 19:16:35,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:16:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-25 19:16:35,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=4742, Unknown=30, NotChecked=0, Total=5256 [2021-11-25 19:16:35,402 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 58 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 51 states have internal predecessors, (85), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 19:16:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:41,396 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2021-11-25 19:16:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 19:16:41,396 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 51 states have internal predecessors, (85), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2021-11-25 19:16:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:41,398 INFO L225 Difference]: With dead ends: 119 [2021-11-25 19:16:41,398 INFO L226 Difference]: Without dead ends: 115 [2021-11-25 19:16:41,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 148 SyntacticMatches, 15 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 205.8s TimeCoverageRelationStatistics Valid=563, Invalid=5259, Unknown=30, NotChecked=0, Total=5852 [2021-11-25 19:16:41,402 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:41,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 211 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 203 Unchecked, 0.5s Time] [2021-11-25 19:16:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-25 19:16:41,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2021-11-25 19:16:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 101 states have (on average 1.188118811881188) internal successors, (120), 101 states have internal predecessors, (120), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:16:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2021-11-25 19:16:41,420 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 56 [2021-11-25 19:16:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:41,421 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2021-11-25 19:16:41,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 51 states have internal predecessors, (85), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 19:16:41,421 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2021-11-25 19:16:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:16:41,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:41,423 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:41,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:41,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:41,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:42,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:42,029 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash 214145686, now seen corresponding path program 3 times [2021-11-25 19:16:42,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:16:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261026989] [2021-11-25 19:16:42,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:16:42,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:16:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:16:42,033 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:16:42,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3c44235-894e-42ea-b344-1acfc23a39b1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 19:16:42,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-25 19:16:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:42,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-25 19:16:42,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:43,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:16:43,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:43,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-25 19:16:44,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:44,347 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-25 19:16:44,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-11-25 19:16:45,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:45,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:45,307 INFO L354 Elim1Store]: treesize reduction 106, result has 13.8 percent of original size [2021-11-25 19:16:45,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 57 [2021-11-25 19:16:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:57,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:16:57,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:57,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:57,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:16:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:16:57,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:17:25,085 WARN L227 SmtUtils]: Spent 27.08s on a formula simplification. DAG size of input: 157 DAG size of output: 59 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 19:17:25,086 INFO L354 Elim1Store]: treesize reduction 816, result has 14.0 percent of original size [2021-11-25 19:17:25,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 132 treesize of output 176 [2021-11-25 19:17:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:17:35,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:17:35,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:17:35,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:17:35,903 INFO L354 Elim1Store]: treesize reduction 47, result has 73.4 percent of original size [2021-11-25 19:17:35,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 149