./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/nr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/nr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a5d4c3d8db636946363c81d25b5c2e381fc236cdcde6b4765d7ce6e059d8a21 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:34:32,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:34:32,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:34:32,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:34:32,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:34:32,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:34:32,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:34:32,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:34:32,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:34:32,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:34:32,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:34:32,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:34:32,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:34:32,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:34:32,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:34:32,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:34:32,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:34:32,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:34:32,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:34:32,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:34:32,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:34:32,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:34:32,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:34:32,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:34:32,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:34:32,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:34:32,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:34:32,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:34:32,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:34:32,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:34:32,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:34:32,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:34:32,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:34:32,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:34:32,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:34:32,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:34:32,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:34:32,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:34:32,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:34:32,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:34:32,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:34:32,857 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:34:32,887 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:34:32,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:34:32,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:34:32,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:34:32,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:34:32,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:34:32,889 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:34:32,889 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:34:32,889 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:34:32,899 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:34:32,900 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:34:32,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:34:32,900 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:34:32,900 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:34:32,901 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:34:32,901 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:34:32,901 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:34:32,901 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:34:32,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:34:32,903 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:34:32,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:34:32,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:34:32,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:34:32,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:34:32,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:34:32,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:34:32,906 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:34:32,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:34:32,907 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:34:32,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:34:32,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:34:32,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:34:32,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:34:32,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:34:32,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:34:32,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:34:32,909 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:34:32,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:34:32,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:34:32,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:34:32,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:34:32,910 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_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a5d4c3d8db636946363c81d25b5c2e381fc236cdcde6b4765d7ce6e059d8a21 [2021-11-23 03:34:33,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:34:33,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:34:33,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:34:33,204 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:34:33,205 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:34:33,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-tiling/nr2.c [2021-11-23 03:34:33,270 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/data/9f102c40f/ef71e2871eb241889ec0debda2148239/FLAG115ffd9b4 [2021-11-23 03:34:33,734 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:34:33,734 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/sv-benchmarks/c/array-tiling/nr2.c [2021-11-23 03:34:33,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/data/9f102c40f/ef71e2871eb241889ec0debda2148239/FLAG115ffd9b4 [2021-11-23 03:34:34,133 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/data/9f102c40f/ef71e2871eb241889ec0debda2148239 [2021-11-23 03:34:34,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:34:34,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:34:34,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:34:34,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:34:34,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:34:34,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556d4dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34, skipping insertion in model container [2021-11-23 03:34:34,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:34:34,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:34:34,368 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_1dfe207d-cf92-4095-9245-e39107bdad00/sv-benchmarks/c/array-tiling/nr2.c[394,407] [2021-11-23 03:34:34,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:34:34,394 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:34:34,407 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_1dfe207d-cf92-4095-9245-e39107bdad00/sv-benchmarks/c/array-tiling/nr2.c[394,407] [2021-11-23 03:34:34,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:34:34,438 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:34:34,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34 WrapperNode [2021-11-23 03:34:34,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:34:34,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:34:34,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:34:34,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:34:34,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,504 INFO L137 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2021-11-23 03:34:34,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:34:34,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:34:34,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:34:34,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:34:34,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:34:34,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:34:34,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:34:34,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:34:34,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (1/1) ... [2021-11-23 03:34:34,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:34:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:34:34,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:34:34,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:34:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:34:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:34:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:34:34,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:34:34,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:34:34,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:34:34,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:34:34,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:34:34,739 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:34:34,741 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:34:34,968 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:34:35,047 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:34:35,047 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:34:35,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:34:35 BoogieIcfgContainer [2021-11-23 03:34:35,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:34:35,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:34:35,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:34:35,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:34:35,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:34:34" (1/3) ... [2021-11-23 03:34:35,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171b1b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:34:35, skipping insertion in model container [2021-11-23 03:34:35,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:34" (2/3) ... [2021-11-23 03:34:35,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171b1b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:34:35, skipping insertion in model container [2021-11-23 03:34:35,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:34:35" (3/3) ... [2021-11-23 03:34:35,082 INFO L111 eAbstractionObserver]: Analyzing ICFG nr2.c [2021-11-23 03:34:35,088 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:34:35,088 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:34:35,185 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:34:35,195 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:34:35,195 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:34:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:34:35,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:35,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:35,227 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:35,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1530238989, now seen corresponding path program 1 times [2021-11-23 03:34:35,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:35,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339028902] [2021-11-23 03:34:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:35,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:35,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:35,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339028902] [2021-11-23 03:34:35,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339028902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:34:35,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:34:35,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:34:35,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694521731] [2021-11-23 03:34:35,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:34:35,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:34:35,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:35,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:34:35,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:34:35,612 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:35,668 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-11-23 03:34:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:34:35,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:34:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:35,677 INFO L225 Difference]: With dead ends: 26 [2021-11-23 03:34:35,678 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 03:34:35,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:34:35,701 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:35,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:34:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 03:34:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-23 03:34:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-23 03:34:35,737 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2021-11-23 03:34:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:35,738 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-23 03:34:35,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-23 03:34:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:34:35,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:35,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:35,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:34:35,741 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash 646031458, now seen corresponding path program 1 times [2021-11-23 03:34:35,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:35,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418581987] [2021-11-23 03:34:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:35,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:35,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:35,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418581987] [2021-11-23 03:34:35,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418581987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:34:35,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:34:35,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:34:35,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41352764] [2021-11-23 03:34:35,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:34:35,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:34:35,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:34:35,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:34:35,850 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:35,883 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-23 03:34:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:34:35,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:34:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:35,886 INFO L225 Difference]: With dead ends: 19 [2021-11-23 03:34:35,886 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 03:34:35,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:34:35,892 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:35,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:34:35,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 03:34:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 03:34:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-23 03:34:35,901 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-23 03:34:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:35,904 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-23 03:34:35,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-23 03:34:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:34:35,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:35,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:35,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:34:35,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1553202252, now seen corresponding path program 1 times [2021-11-23 03:34:35,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:35,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263025842] [2021-11-23 03:34:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:35,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:35,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:35,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263025842] [2021-11-23 03:34:35,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263025842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:34:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013123169] [2021-11-23 03:34:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:35,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:35,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:34:36,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:34:36,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:34:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:36,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:34:36,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:34:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:36,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:34:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:36,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013123169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:34:36,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733880147] [2021-11-23 03:34:36,213 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:34:36,213 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:34:36,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:34:36,223 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:34:36,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:34:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:36,355 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-23 03:34:36,356 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 24 treesize of output 40 [2021-11-23 03:34:36,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:36,411 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:34:36,412 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 [2021-11-23 03:34:36,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:36,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-23 03:34:36,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:34:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:36,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 46 [2021-11-23 03:34:37,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,222 INFO L354 Elim1Store]: treesize reduction 286, result has 13.1 percent of original size [2021-11-23 03:34:37,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-23 03:34:37,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:34:37,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 87 [2021-11-23 03:34:37,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:37,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 94 [2021-11-23 03:34:37,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:34:37,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:34:37,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:34:37,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:34:37,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:34:38,202 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:34:39,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '176#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (< |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~MINVAL~0#1|) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 0)) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:34:39,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:34:39,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:34:39,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-23 03:34:39,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695063619] [2021-11-23 03:34:39,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:34:39,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:34:39,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:34:39,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:34:39,089 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:39,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:39,123 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-11-23 03:34:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:34:39,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 03:34:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:39,125 INFO L225 Difference]: With dead ends: 21 [2021-11-23 03:34:39,125 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 03:34:39,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:34:39,128 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:39,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:34:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 03:34:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-23 03:34:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-23 03:34:39,138 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-23 03:34:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:39,139 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-23 03:34:39,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-23 03:34:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:34:39,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:39,140 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:39,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 03:34:39,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:39,354 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:39,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1009970526, now seen corresponding path program 2 times [2021-11-23 03:34:39,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:39,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766368873] [2021-11-23 03:34:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:39,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:39,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:39,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766368873] [2021-11-23 03:34:39,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766368873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:34:39,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396490046] [2021-11-23 03:34:39,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:34:39,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:39,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:34:39,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:34:39,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:34:39,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:34:39,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:34:39,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:34:39,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:34:39,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 12 [2021-11-23 03:34:39,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2021-11-23 03:34:39,805 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 03:34:39,806 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 69 [2021-11-23 03:34:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:39,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2021-11-23 03:34:40,019 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 03:34:40,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 66 [2021-11-23 03:34:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:40,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:34:40,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:34:40,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 87 [2021-11-23 03:34:40,252 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 15 treesize of output 4 [2021-11-23 03:34:40,279 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 15 treesize of output 4 [2021-11-23 03:34:40,346 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 74 treesize of output 66 [2021-11-23 03:34:40,355 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-23 03:34:40,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 79 [2021-11-23 03:34:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:40,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396490046] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:34:40,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1552877474] [2021-11-23 03:34:40,415 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:34:40,415 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:34:40,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:34:40,415 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:34:40,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:34:40,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,502 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:34:40,503 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 [2021-11-23 03:34:40,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,518 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 24 treesize of output 32 [2021-11-23 03:34:40,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-23 03:34:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 62 [2021-11-23 03:34:40,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:34:40,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,012 INFO L354 Elim1Store]: treesize reduction 286, result has 13.1 percent of original size [2021-11-23 03:34:41,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-23 03:34:41,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:41,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:41,196 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:34:41,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 598 treesize of output 526 [2021-11-23 03:34:41,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:41,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:41,402 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:34:41,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 591 treesize of output 475 [2021-11-23 03:34:41,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:34:41,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:34:41,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:34:41,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:34:41,864 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:34:42,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '311#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (< |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~MINVAL~0#1|) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 0)) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:34:42,761 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:34:42,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:34:42,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 18 [2021-11-23 03:34:42,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645879724] [2021-11-23 03:34:42,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:34:42,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:34:42,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:42,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:34:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:34:42,764 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:42,887 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-11-23 03:34:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:34:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:34:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:42,889 INFO L225 Difference]: With dead ends: 25 [2021-11-23 03:34:42,889 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 03:34:42,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:34:42,890 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:42,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 58 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-11-23 03:34:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 03:34:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-11-23 03:34:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-23 03:34:42,895 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-23 03:34:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:42,896 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-23 03:34:42,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-23 03:34:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:34:42,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:42,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:42,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:34:43,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:43,122 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1780752621, now seen corresponding path program 1 times [2021-11-23 03:34:43,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:43,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277158089] [2021-11-23 03:34:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:43,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:43,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:43,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277158089] [2021-11-23 03:34:43,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277158089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:34:43,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212780836] [2021-11-23 03:34:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:43,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:43,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:34:43,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:34:43,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:34:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:43,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 03:34:43,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:34:43,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2021-11-23 03:34:43,575 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 37 treesize of output 29 [2021-11-23 03:34:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:43,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:34:43,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:34:43,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 57 [2021-11-23 03:34:43,697 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 15 treesize of output 4 [2021-11-23 03:34:43,726 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 15 treesize of output 4 [2021-11-23 03:34:43,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:34:43,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2021-11-23 03:34:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:43,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212780836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:34:43,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306554511] [2021-11-23 03:34:43,849 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 03:34:43,849 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:34:43,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:34:43,850 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:34:43,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:34:43,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:43,912 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:34:43,912 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 [2021-11-23 03:34:43,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:43,931 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 24 treesize of output 32 [2021-11-23 03:34:43,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:43,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2021-11-23 03:34:44,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:44,284 INFO L354 Elim1Store]: treesize reduction 346, result has 18.6 percent of original size [2021-11-23 03:34:44,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 510 treesize of output 583 [2021-11-23 03:34:44,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:44,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:44,418 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:34:44,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 610 treesize of output 516 [2021-11-23 03:34:44,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:44,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:44,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:44,665 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:34:44,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 612 treesize of output 518 [2021-11-23 03:34:44,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:34:44,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:34:44,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:34:44,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:34:45,307 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:34:45,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '481#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:34:45,949 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:34:45,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:34:45,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-23 03:34:45,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211667639] [2021-11-23 03:34:45,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:34:45,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 03:34:45,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:45,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 03:34:45,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:34:45,952 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:46,247 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-23 03:34:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:34:46,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 03:34:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:46,249 INFO L225 Difference]: With dead ends: 34 [2021-11-23 03:34:46,249 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 03:34:46,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:34:46,251 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:46,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 39 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:34:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 03:34:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2021-11-23 03:34:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-23 03:34:46,257 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2021-11-23 03:34:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:46,257 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-23 03:34:46,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:46,258 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-23 03:34:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:34:46,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:46,258 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:46,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:34:46,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:46,459 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:46,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1039986946, now seen corresponding path program 2 times [2021-11-23 03:34:46,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:46,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563287143] [2021-11-23 03:34:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:46,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:34:46,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563287143] [2021-11-23 03:34:46,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563287143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:34:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949901214] [2021-11-23 03:34:46,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:34:46,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:46,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:34:46,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:34:46,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:34:46,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:34:46,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:34:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:34:46,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:34:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:34:46,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:34:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:34:47,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949901214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:34:47,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867984624] [2021-11-23 03:34:47,073 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 03:34:47,073 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:34:47,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:34:47,073 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:34:47,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:34:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,120 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:34:47,120 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 [2021-11-23 03:34:47,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,134 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 24 treesize of output 32 [2021-11-23 03:34:47,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 189 [2021-11-23 03:34:47,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:34:47,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 53 [2021-11-23 03:34:47,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,529 INFO L354 Elim1Store]: treesize reduction 286, result has 13.1 percent of original size [2021-11-23 03:34:47,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 520 treesize of output 584 [2021-11-23 03:34:47,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:47,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:47,613 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:34:47,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 598 treesize of output 506 [2021-11-23 03:34:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:34:47,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:47,855 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:34:47,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 591 treesize of output 495 [2021-11-23 03:34:48,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:34:48,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:34:48,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:34:48,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:34:48,408 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:34:48,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '707#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:34:48,982 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:34:48,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:34:48,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2021-11-23 03:34:48,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160607115] [2021-11-23 03:34:48,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:34:48,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:34:48,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:34:48,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:34:48,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:34:48,985 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:49,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:34:49,199 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-23 03:34:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:34:49,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 03:34:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:34:49,200 INFO L225 Difference]: With dead ends: 40 [2021-11-23 03:34:49,200 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 03:34:49,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:34:49,202 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:34:49,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:34:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 03:34:49,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-11-23 03:34:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-23 03:34:49,208 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2021-11-23 03:34:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:34:49,208 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-23 03:34:49,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:34:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-23 03:34:49,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:34:49,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:34:49,209 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:34:49,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:34:49,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:34:49,410 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:34:49,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:34:49,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2069078404, now seen corresponding path program 3 times [2021-11-23 03:34:49,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:34:49,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014286875] [2021-11-23 03:34:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:34:49,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:34:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:34:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:49,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:34:49,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014286875] [2021-11-23 03:34:49,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014286875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:34:49,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395538956] [2021-11-23 03:34:49,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:34:49,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:34:49,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:34:49,729 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:34:49,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:34:49,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:34:49,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:34:49,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:34:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:34:49,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2021-11-23 03:34:49,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:34:49,887 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 14 treesize of output 3 [2021-11-23 03:34:50,014 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-23 03:34:50,014 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 35 treesize of output 34 [2021-11-23 03:34:50,089 INFO L354 Elim1Store]: treesize reduction 198, result has 19.8 percent of original size [2021-11-23 03:34:50,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 110 [2021-11-23 03:34:50,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:50,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:34:50,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 31 [2021-11-23 03:34:50,623 INFO L354 Elim1Store]: treesize reduction 103, result has 2.8 percent of original size [2021-11-23 03:34:50,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 119 treesize of output 81 [2021-11-23 03:34:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:34:50,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:34:51,614 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_68| Int)) (or (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (* |v_ULTIMATE.start_main_~j~0#1_68| (- 4)))) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (* |c_ULTIMATE.start_main_~j~0#1| (- 4))))) (and (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0) (or (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|) (let ((.cse4 (store .cse0 .cse1 |c_ULTIMATE.start_main_~j~0#1|))) (and (= (select (store .cse4 .cse2 0) .cse3) 0) (or (= (select (store .cse4 .cse2 |v_ULTIMATE.start_main_~j~0#1_68|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_68| |c_ULTIMATE.start_main_~MINVAL~0#1|)))))))) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_68| 1)))) is different from false [2021-11-23 03:35:17,293 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_100| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_68| Int)) (or (< 1 |v_ULTIMATE.start_main_~j~0#1_68|) (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_100| 8))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_68| (- 4)) .cse4)) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (or (= (select (store (store .cse0 .cse1 2) .cse2 |v_ULTIMATE.start_main_~j~0#1_68|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_68| |c_ULTIMATE.start_main_~MINVAL~0#1|)) (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0)))))) (< |v_ULTIMATE.start_main_~i~0#1_100| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-11-23 03:35:17,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:35:17,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:35:17,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 115 [2021-11-23 03:35:17,361 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 15 treesize of output 4 [2021-11-23 03:35:17,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2021-11-23 03:35:17,511 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 99 treesize of output 91 [2021-11-23 03:35:17,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:35:17,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 277 treesize of output 264 [2021-11-23 03:35:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-23 03:35:19,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395538956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:35:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357870437] [2021-11-23 03:35:19,058 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 03:35:19,058 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:35:19,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:35:19,058 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:35:19,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:35:19,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:19,117 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:35:19,117 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 [2021-11-23 03:35:19,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:19,132 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 24 treesize of output 32 [2021-11-23 03:35:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:19,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2021-11-23 03:35:19,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:19,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:35:19,460 INFO L354 Elim1Store]: treesize reduction 346, result has 18.6 percent of original size [2021-11-23 03:35:19,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 510 treesize of output 583 [2021-11-23 03:35:19,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:35:19,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:35:19,664 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:35:19,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 1037 treesize of output 911 [2021-11-23 03:35:20,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:20,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:20,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:35:20,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:20,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:20,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:20,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:35:20,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:35:20,032 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:35:20,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 1039 treesize of output 922 [2021-11-23 03:35:20,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:35:20,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:35:20,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:35:20,450 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 19 treesize of output 15 [2021-11-23 03:35:20,778 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:35:21,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '955#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:35:21,527 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:35:21,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:35:21,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2021-11-23 03:35:21,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840168841] [2021-11-23 03:35:21,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:35:21,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 03:35:21,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 03:35:21,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1524, Unknown=30, NotChecked=166, Total=1980 [2021-11-23 03:35:21,531 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:35:23,560 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~j~0#1| 1) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_100| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_68| Int)) (or (< 1 |v_ULTIMATE.start_main_~j~0#1_68|) (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_100| 8))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_68| (- 4)) .cse4)) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (or (= (select (store (store .cse0 .cse1 2) .cse2 |v_ULTIMATE.start_main_~j~0#1_68|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_68| |c_ULTIMATE.start_main_~MINVAL~0#1|)) (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0)))))) (< |v_ULTIMATE.start_main_~i~0#1_100| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-11-23 03:35:25,564 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~i~0#1| 1) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_100| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_68| Int)) (or (< 1 |v_ULTIMATE.start_main_~j~0#1_68|) (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_100| 8))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_68| (- 4)) .cse4)) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (or (= (select (store (store .cse0 .cse1 2) .cse2 |v_ULTIMATE.start_main_~j~0#1_68|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_68| |c_ULTIMATE.start_main_~MINVAL~0#1|)) (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0)))))) (< |v_ULTIMATE.start_main_~i~0#1_100| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (exists ((|v_ULTIMATE.start_main_~j~0#1_64| Int)) (and (<= |v_ULTIMATE.start_main_~j~0#1_64| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_64| (- 4)) (* |c_ULTIMATE.start_main_~i~0#1| 8))) 0) (<= 1 |v_ULTIMATE.start_main_~j~0#1_64|)))) is different from false [2021-11-23 03:35:26,231 WARN L838 $PredicateComparison]: unable to prove that (and (= 2 |c_ULTIMATE.start_main_~j~0#1|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) |c_ULTIMATE.start_main_~j~0#1|) 4) 0) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= (+ 3 (div (+ 4 (* |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 1))) 4)) (* 2 |c_ULTIMATE.start_main_~i~0#1|)) (forall ((|v_ULTIMATE.start_main_~j~0#1_68| Int)) (or (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (* |v_ULTIMATE.start_main_~j~0#1_68| (- 4)))) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (* |c_ULTIMATE.start_main_~j~0#1| (- 4))))) (and (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0) (or (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|) (let ((.cse4 (store .cse0 .cse1 |c_ULTIMATE.start_main_~j~0#1|))) (and (= (select (store .cse4 .cse2 0) .cse3) 0) (or (= (select (store .cse4 .cse2 |v_ULTIMATE.start_main_~j~0#1_68|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_68| |c_ULTIMATE.start_main_~MINVAL~0#1|)))))))) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_68| 1))))) is different from false [2021-11-23 03:35:27,053 WARN L838 $PredicateComparison]: unable to prove that (and (= 2 |c_ULTIMATE.start_main_~j~0#1|) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (exists ((|v_ULTIMATE.start_main_~j~0#1_64| Int)) (and (<= |v_ULTIMATE.start_main_~j~0#1_64| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_64| (- 4)) 8)) 0) (<= 1 |v_ULTIMATE.start_main_~j~0#1_64|))) (forall ((|v_ULTIMATE.start_main_~j~0#1_68| Int)) (or (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (* |v_ULTIMATE.start_main_~j~0#1_68| (- 4)))) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse5 (* |c_ULTIMATE.start_main_~j~0#1| (- 4))))) (and (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0) (or (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|) (let ((.cse4 (store .cse0 .cse1 |c_ULTIMATE.start_main_~j~0#1|))) (and (= (select (store .cse4 .cse2 0) .cse3) 0) (or (= (select (store .cse4 .cse2 |v_ULTIMATE.start_main_~j~0#1_68|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_68| |c_ULTIMATE.start_main_~MINVAL~0#1|)))))))) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_68| 1))))) is different from false [2021-11-23 03:35:30,114 WARN L838 $PredicateComparison]: unable to prove that (and (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) 4)) (or (and (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|) (= (* 8 |c_ULTIMATE.start_main_~i~0#1|) (+ 4 (* 4 |c_ULTIMATE.start_main_~j~0#1|)))) (< |c_ULTIMATE.start_main_~j~0#1| 1)) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_100| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_68| Int)) (or (< 1 |v_ULTIMATE.start_main_~j~0#1_68|) (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_100| 8))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_68| (- 4)) .cse4)) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (or (= (select (store (store .cse0 .cse1 2) .cse2 |v_ULTIMATE.start_main_~j~0#1_68|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_68| |c_ULTIMATE.start_main_~MINVAL~0#1|)) (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0)))))) (< |v_ULTIMATE.start_main_~i~0#1_100| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-11-23 03:35:33,076 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 0) (or (and (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|) (= (* 8 |c_ULTIMATE.start_main_~i~0#1|) (+ 4 (* 4 |c_ULTIMATE.start_main_~j~0#1|)))) (< |c_ULTIMATE.start_main_~j~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_100| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_68| Int)) (or (< 1 |v_ULTIMATE.start_main_~j~0#1_68|) (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_100| 8))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_68| (- 4)) .cse4)) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (or (= (select (store (store .cse0 .cse1 2) .cse2 |v_ULTIMATE.start_main_~j~0#1_68|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_68| |c_ULTIMATE.start_main_~MINVAL~0#1|)) (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0)))))) (< |v_ULTIMATE.start_main_~i~0#1_100| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-11-23 03:36:33,921 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~j~0#1_68| Int)) (or (let ((.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (- 8))) (.cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse4 (* |v_ULTIMATE.start_main_~j~0#1_68| (- 4)))) (.cse3 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4))) (and (or (= (select (store (store .cse0 .cse1 2) .cse2 |v_ULTIMATE.start_main_~j~0#1_68|) .cse3) 0) (< |v_ULTIMATE.start_main_~j~0#1_68| |c_ULTIMATE.start_main_~MINVAL~0#1|)) (= (select (store (store .cse0 .cse1 0) .cse2 0) .cse3) 0)))) (< 1 |v_ULTIMATE.start_main_~j~0#1_68|))) (forall ((|v_ULTIMATE.start_main_~j~0#1_68| Int)) (or (let ((.cse10 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (let ((.cse7 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse10 (* |v_ULTIMATE.start_main_~j~0#1_68| (- 4)))) (.cse8 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse6 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse10 (* |c_ULTIMATE.start_main_~j~0#1| (- 4))))) (and (= (select (store (store .cse5 .cse6 0) .cse7 0) .cse8) 0) (or (< |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~MINVAL~0#1|) (let ((.cse9 (store .cse5 .cse6 |c_ULTIMATE.start_main_~j~0#1|))) (and (= (select (store .cse9 .cse7 0) .cse8) 0) (or (= (select (store .cse9 .cse7 |v_ULTIMATE.start_main_~j~0#1_68|) .cse8) 0) (< |v_ULTIMATE.start_main_~j~0#1_68| |c_ULTIMATE.start_main_~MINVAL~0#1|)))))))) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_68| 1))))) is different from false [2021-11-23 03:36:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:37,829 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-11-23 03:36:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 03:36:37,830 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 03:36:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:37,833 INFO L225 Difference]: With dead ends: 63 [2021-11-23 03:36:37,833 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 03:36:37,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 104.7s TimeCoverageRelationStatistics Valid=422, Invalid=2393, Unknown=83, NotChecked=1008, Total=3906 [2021-11-23 03:36:37,836 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:37,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 55 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 138 Unchecked, 0.0s Time] [2021-11-23 03:36:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 03:36:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2021-11-23 03:36:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-11-23 03:36:37,867 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 18 [2021-11-23 03:36:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:37,867 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-11-23 03:36:37,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-11-23 03:36:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:36:37,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:37,869 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:37,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:38,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:38,078 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:38,079 INFO L85 PathProgramCache]: Analyzing trace with hash 496746308, now seen corresponding path program 4 times [2021-11-23 03:36:38,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:38,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152293764] [2021-11-23 03:36:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:38,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 03:36:38,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:38,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152293764] [2021-11-23 03:36:38,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152293764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:38,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134104812] [2021-11-23 03:36:38,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:36:38,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:38,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:38,122 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:38,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:36:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:38,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:36:38,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 03:36:38,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:38,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134104812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:38,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:36:38,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-11-23 03:36:38,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752185940] [2021-11-23 03:36:38,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:38,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:36:38,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:38,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:36:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:36:38,225 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:38,266 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-11-23 03:36:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:36:38,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 03:36:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:38,268 INFO L225 Difference]: With dead ends: 58 [2021-11-23 03:36:38,268 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 03:36:38,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:36:38,269 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:38,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 6 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:36:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 03:36:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 03:36:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-23 03:36:38,286 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 20 [2021-11-23 03:36:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:38,287 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-23 03:36:38,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-23 03:36:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:36:38,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:38,289 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:38,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:36:38,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:38,502 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1450619663, now seen corresponding path program 5 times [2021-11-23 03:36:38,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:38,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475925381] [2021-11-23 03:36:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:38,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:36:38,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:38,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475925381] [2021-11-23 03:36:38,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475925381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:38,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475659391] [2021-11-23 03:36:38,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:36:38,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:38,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:38,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:38,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:36:38,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 03:36:38,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:36:38,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:36:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:38,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:36:38,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:36:38,938 INFO L354 Elim1Store]: treesize reduction 108, result has 22.3 percent of original size [2021-11-23 03:36:38,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 109 [2021-11-23 03:36:38,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:38,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2021-11-23 03:36:39,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:39,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 24 [2021-11-23 03:36:39,758 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 79 treesize of output 63 [2021-11-23 03:36:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:36:39,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:40,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:36:40,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 94 [2021-11-23 03:36:40,235 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 15 treesize of output 4 [2021-11-23 03:36:40,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2021-11-23 03:36:40,280 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 80 treesize of output 72 [2021-11-23 03:36:40,295 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 03:36:40,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 93 [2021-11-23 03:36:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:36:40,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475659391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:40,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [322902977] [2021-11-23 03:36:40,374 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 03:36:40,374 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:40,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:40,375 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:40,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:40,437 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:36:40,438 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 [2021-11-23 03:36:40,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:40,449 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 24 treesize of output 32 [2021-11-23 03:36:40,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:40,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2021-11-23 03:36:40,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:40,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:40,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:40,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:40,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:40,770 INFO L354 Elim1Store]: treesize reduction 346, result has 18.6 percent of original size [2021-11-23 03:36:40,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 510 treesize of output 583 [2021-11-23 03:36:41,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:41,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:41,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:41,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:41,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:41,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:36:41,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:41,057 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:36:41,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 19 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 1039 treesize of output 922 [2021-11-23 03:36:41,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:41,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:36:41,358 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:36:41,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 1037 treesize of output 911 [2021-11-23 03:36:41,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:36:41,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:36:41,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 03:36:41,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:36:42,032 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:42,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1525#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:36:42,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:36:42,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:36:42,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 11] total 26 [2021-11-23 03:36:42,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431115189] [2021-11-23 03:36:42,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:36:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 03:36:42,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 03:36:42,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:36:42,848 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:43,514 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-11-23 03:36:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:36:43,514 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 03:36:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:43,515 INFO L225 Difference]: With dead ends: 45 [2021-11-23 03:36:43,515 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:36:43,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 03:36:43,517 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:43,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 6 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 207 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2021-11-23 03:36:43,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:36:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:36:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:36:43,523 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-11-23 03:36:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:43,523 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:36:43,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:36:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:36:43,524 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:36:43,527 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:36:43,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 03:36:43,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:43,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 03:36:45,778 INFO L861 garLoopResultBuilder]: At program point L48(lines 13 49) the Hoare annotation is: true [2021-11-23 03:36:45,779 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 03:36:45,779 INFO L854 garLoopResultBuilder]: At program point L28-3(lines 28 41) the Hoare annotation is: (let ((.cse0 (<= 2 ~CELLCOUNT~0)) (.cse1 (= 2 |ULTIMATE.start_main_~MINVAL~0#1|)) (.cse2 (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0))) (or (and .cse0 (= |ULTIMATE.start_main_~i~0#1| 1) .cse1 .cse2 (= ~CELLCOUNT~0 (* 2 (div ~CELLCOUNT~0 2)))) (and .cse0 .cse1 .cse2 (let ((.cse3 (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) |ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (<= |ULTIMATE.start_main_~MINVAL~0#1| .cse3) (= .cse3 0))) (<= |ULTIMATE.start_main_~j~0#1| 0)))) [2021-11-23 03:36:45,779 INFO L858 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-11-23 03:36:45,779 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-11-23 03:36:45,779 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 47) no Hoare annotation was computed. [2021-11-23 03:36:45,780 INFO L858 garLoopResultBuilder]: For program point L16-2(lines 16 47) no Hoare annotation was computed. [2021-11-23 03:36:45,780 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-11-23 03:36:45,780 INFO L858 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-11-23 03:36:45,780 INFO L858 garLoopResultBuilder]: For program point L8-3(line 8) no Hoare annotation was computed. [2021-11-23 03:36:45,780 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 03:36:45,781 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 40) the Hoare annotation is: (let ((.cse1 (= 2 |ULTIMATE.start_main_~MINVAL~0#1|)) (.cse2 (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0)) (.cse3 (or (<= |ULTIMATE.start_main_~i~0#1| (div ~CELLCOUNT~0 2)) (<= ~CELLCOUNT~0 2))) (.cse4 (let ((.cse6 (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) |ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (<= |ULTIMATE.start_main_~MINVAL~0#1| .cse6) (= .cse6 0)))) (.cse0 (<= 2 ~CELLCOUNT~0))) (or (and (<= |ULTIMATE.start_main_~j~0#1| 1) .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse1 .cse2 .cse3 (let ((.cse5 (= 2 |ULTIMATE.start_main_~j~0#1|))) (or (and .cse5 .cse0 .cse4) (and .cse5 .cse0 (= |ULTIMATE.start_main_~i~0#1| 1))))))) [2021-11-23 03:36:45,781 INFO L854 garLoopResultBuilder]: At program point L43-3(lines 43 46) the Hoare annotation is: (let ((.cse8 (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|))) (let ((.cse11 (div ~CELLCOUNT~0 2)) (.cse12 (select .cse8 (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (let ((.cse10 (= .cse12 0)) (.cse9 (* 2 .cse11))) (let ((.cse5 (< .cse11 2)) (.cse7 (= ~CELLCOUNT~0 .cse9)) (.cse3 (not (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0))) (.cse0 (<= 2 ~CELLCOUNT~0)) (.cse1 (= 2 |ULTIMATE.start_main_~MINVAL~0#1|)) (.cse2 (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0)) (.cse6 (or (<= |ULTIMATE.start_main_~MINVAL~0#1| .cse12) .cse10)) (.cse4 (<= |ULTIMATE.start_main_~j~0#1| 0))) (or (and .cse0 .cse1 (< 0 |ULTIMATE.start___VERIFIER_assert_~cond#1|) .cse2 .cse3 .cse4) (and .cse0 .cse5 (<= |ULTIMATE.start_main_~i~0#1| 2) .cse1 (<= (mod ~CELLCOUNT~0 2) 0) .cse2 .cse3 (<= 2 |ULTIMATE.start_main_~i~0#1|)) (and .cse0 .cse5 (= |ULTIMATE.start_main_~i~0#1| 1) .cse1 .cse2 .cse6 .cse7) (and (= |ULTIMATE.start_main_~i~0#1| 0) .cse0 .cse1 (= 0 (select .cse8 4)) .cse2 .cse6 .cse7 (<= .cse9 2)) (and (or (and .cse0 .cse1 .cse2 .cse3 .cse10) (and .cse0 .cse1 .cse2 .cse6 (or (<= ~CELLCOUNT~0 2) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) .cse11)))) .cse4)))))) [2021-11-23 03:36:45,785 INFO L732 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1] [2021-11-23 03:36:45,786 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:36:45,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:36:45 BoogieIcfgContainer [2021-11-23 03:36:45,812 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:36:45,812 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:36:45,813 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:36:45,813 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:36:45,813 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:34:35" (3/4) ... [2021-11-23 03:36:45,817 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:36:45,828 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2021-11-23 03:36:45,828 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-23 03:36:45,829 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 03:36:45,829 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:36:45,829 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:36:45,869 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:36:45,869 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:36:45,870 INFO L158 Benchmark]: Toolchain (without parser) took 131732.13ms. Allocated memory was 102.8MB in the beginning and 262.1MB in the end (delta: 159.4MB). Free memory was 65.9MB in the beginning and 128.0MB in the end (delta: -62.1MB). Peak memory consumption was 97.5MB. Max. memory is 16.1GB. [2021-11-23 03:36:45,870 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 102.8MB. Free memory is still 82.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:36:45,871 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.11ms. Allocated memory is still 102.8MB. Free memory was 65.8MB in the beginning and 78.8MB in the end (delta: -13.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:36:45,871 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.47ms. Allocated memory is still 102.8MB. Free memory was 78.8MB in the beginning and 77.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:36:45,872 INFO L158 Benchmark]: Boogie Preprocessor took 30.60ms. Allocated memory is still 102.8MB. Free memory was 77.2MB in the beginning and 76.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:36:45,872 INFO L158 Benchmark]: RCFGBuilder took 513.25ms. Allocated memory is still 102.8MB. Free memory was 75.7MB in the beginning and 63.4MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 03:36:45,872 INFO L158 Benchmark]: TraceAbstraction took 130737.47ms. Allocated memory was 102.8MB in the beginning and 262.1MB in the end (delta: 159.4MB). Free memory was 62.8MB in the beginning and 131.2MB in the end (delta: -68.4MB). Peak memory consumption was 142.8MB. Max. memory is 16.1GB. [2021-11-23 03:36:45,873 INFO L158 Benchmark]: Witness Printer took 57.06ms. Allocated memory is still 262.1MB. Free memory was 131.2MB in the beginning and 128.0MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:36:45,874 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 102.8MB. Free memory is still 82.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.11ms. Allocated memory is still 102.8MB. Free memory was 65.8MB in the beginning and 78.8MB in the end (delta: -13.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.47ms. Allocated memory is still 102.8MB. Free memory was 78.8MB in the beginning and 77.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.60ms. Allocated memory is still 102.8MB. Free memory was 77.2MB in the beginning and 76.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 513.25ms. Allocated memory is still 102.8MB. Free memory was 75.7MB in the beginning and 63.4MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 130737.47ms. Allocated memory was 102.8MB in the beginning and 262.1MB in the end (delta: 159.4MB). Free memory was 62.8MB in the beginning and 131.2MB in the end (delta: -68.4MB). Peak memory consumption was 142.8MB. Max. memory is 16.1GB. * Witness Printer took 57.06ms. Allocated memory is still 262.1MB. Free memory was 131.2MB in the beginning and 128.0MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 130.6s, OverallIterations: 9, TraceHistogramMax: 6, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 77.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 197 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 197 mSDsluCounter, 188 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 208 IncrementalHoareTripleChecker+Unchecked, 183 mSDsCounter, 136 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 648 IncrementalHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 136 mSolverCounterUnsat, 44 mSDtfsCounter, 648 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 404 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 215 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2644 ImplicationChecksByTransitivity, 110.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=7, InterpolantAutomatonStates: 117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 54 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 34 NumberOfFragments, 367 HoareAnnotationTreeSize, 4 FomulaSimplifications, 2141 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 4 FomulaSimplificationsInter, 12187 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 33.9s InterpolantComputationTime, 238 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 307 ConstructedInterpolants, 18 QuantifiedInterpolants, 3384 SizeOfPredicates, 54 NumberOfNonLiveVariables, 723 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 22 InterpolantComputations, 3 PerfectInterpolantSequences, 106/271 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((2 <= CELLCOUNT && i == 1) && 2 == MINVAL) && volArray == 0) && CELLCOUNT == 2 * (CELLCOUNT / 2)) || ((((2 <= CELLCOUNT && 2 == MINVAL) && volArray == 0) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray] || unknown-#memory_int-unknown[volArray][volArray] == 0)) && j <= 0) - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: ((((((((2 <= CELLCOUNT && 2 == MINVAL) && 0 < cond) && volArray == 0) && !(cond == 0)) && j <= 0) || (((((((2 <= CELLCOUNT && CELLCOUNT / 2 < 2) && i <= 2) && 2 == MINVAL) && CELLCOUNT % 2 <= 0) && volArray == 0) && !(cond == 0)) && 2 <= i)) || ((((((2 <= CELLCOUNT && CELLCOUNT / 2 < 2) && i == 1) && 2 == MINVAL) && volArray == 0) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray + i * 4] || unknown-#memory_int-unknown[volArray][volArray + i * 4] == 0)) && CELLCOUNT == 2 * (CELLCOUNT / 2))) || (((((((i == 0 && 2 <= CELLCOUNT) && 2 == MINVAL) && 0 == unknown-#memory_int-unknown[volArray][4]) && volArray == 0) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray + i * 4] || unknown-#memory_int-unknown[volArray][volArray + i * 4] == 0)) && CELLCOUNT == 2 * (CELLCOUNT / 2)) && 2 * (CELLCOUNT / 2) <= 2)) || ((((((2 <= CELLCOUNT && 2 == MINVAL) && volArray == 0) && !(cond == 0)) && unknown-#memory_int-unknown[volArray][volArray + i * 4] == 0) || ((((2 <= CELLCOUNT && 2 == MINVAL) && volArray == 0) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray + i * 4] || unknown-#memory_int-unknown[volArray][volArray + i * 4] == 0)) && (CELLCOUNT <= 2 || i + 1 <= CELLCOUNT / 2))) && j <= 0) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((((j <= 1 && 2 <= CELLCOUNT) && 2 == MINVAL) && volArray == 0) && (i <= CELLCOUNT / 2 || CELLCOUNT <= 2)) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray] || unknown-#memory_int-unknown[volArray][volArray] == 0)) || (((2 == MINVAL && volArray == 0) && (i <= CELLCOUNT / 2 || CELLCOUNT <= 2)) && (((2 == j && 2 <= CELLCOUNT) && (MINVAL <= unknown-#memory_int-unknown[volArray][volArray] || unknown-#memory_int-unknown[volArray][volArray] == 0)) || ((2 == j && 2 <= CELLCOUNT) && i == 1))) RESULT: Ultimate proved your program to be correct! [2021-11-23 03:36:46,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dfe207d-cf92-4095-9245-e39107bdad00/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE