./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f3d22aeda2fb15b9dd79854281ee0f5e475c0f7ee1551b76594f45703ddc81df --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:34:49,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:34:49,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:34:49,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:34:49,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:34:49,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:34:49,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:34:49,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:34:49,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:34:49,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:34:49,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:34:49,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:34:49,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:34:49,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:34:49,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:34:49,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:34:49,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:34:49,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:34:49,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:34:49,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:34:49,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:34:49,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:34:49,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:34:49,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:34:49,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:34:49,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:34:49,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:34:49,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:34:49,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:34:49,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:34:49,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:34:49,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:34:49,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:34:49,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:34:49,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:34:49,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:34:49,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:34:49,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:34:49,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:34:49,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:34:49,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:34:49,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:34:49,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:34:49,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:34:49,835 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:34:49,835 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:34:49,836 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:34:49,836 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:34:49,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:34:49,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:34:49,837 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:34:49,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:34:49,837 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:34:49,838 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:34:49,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:34:49,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:34:49,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:34:49,838 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:34:49,838 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:34:49,838 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:34:49,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:34:49,839 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:34:49,839 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:34:49,839 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:34:49,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:34:49,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:34:49,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:34:49,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:34:49,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:34:49,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:34:49,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:34:49,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:34:49,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:34:49,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3d22aeda2fb15b9dd79854281ee0f5e475c0f7ee1551b76594f45703ddc81df [2021-12-22 16:34:50,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:34:50,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:34:50,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:34:50,074 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:34:50,074 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:34:50,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2021-12-22 16:34:50,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caadab4ad/ebb2653e7d8a428d9779e55e80e9193b/FLAGb7e6defc2 [2021-12-22 16:34:50,489 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:34:50,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2021-12-22 16:34:50,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caadab4ad/ebb2653e7d8a428d9779e55e80e9193b/FLAGb7e6defc2 [2021-12-22 16:34:50,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caadab4ad/ebb2653e7d8a428d9779e55e80e9193b [2021-12-22 16:34:50,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:34:50,519 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:34:50,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:34:50,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:34:50,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:34:50,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1074d671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50, skipping insertion in model container [2021-12-22 16:34:50,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:34:50,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:34:50,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:34:50,689 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:34:50,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:34:50,711 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:34:50,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50 WrapperNode [2021-12-22 16:34:50,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:34:50,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:34:50,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:34:50,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:34:50,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,738 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-12-22 16:34:50,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:34:50,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:34:50,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:34:50,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:34:50,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:34:50,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:34:50,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:34:50,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:34:50,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (1/1) ... [2021-12-22 16:34:50,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:34:50,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:50,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 16:34:50,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 16:34:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:34:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:34:50,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:34:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:34:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 16:34:50,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:34:50,868 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:34:50,869 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:34:50,969 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:34:50,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:34:50,973 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 16:34:50,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:34:50 BoogieIcfgContainer [2021-12-22 16:34:50,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:34:50,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:34:50,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:34:50,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:34:50,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:34:50" (1/3) ... [2021-12-22 16:34:50,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fcf227a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:34:50, skipping insertion in model container [2021-12-22 16:34:50,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:50" (2/3) ... [2021-12-22 16:34:50,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fcf227a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:34:50, skipping insertion in model container [2021-12-22 16:34:50,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:34:50" (3/3) ... [2021-12-22 16:34:50,980 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4.c [2021-12-22 16:34:50,983 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:34:50,983 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-22 16:34:51,010 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:34:51,016 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-22 16:34:51,017 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-22 16:34:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 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) [2021-12-22 16:34:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-22 16:34:51,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:51,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-22 16:34:51,036 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:51,044 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-12-22 16:34:51,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:51,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368791936] [2021-12-22 16:34:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:51,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:51,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:51,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368791936] [2021-12-22 16:34:51,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368791936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:51,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:51,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:34:51,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638001979] [2021-12-22 16:34:51,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:51,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:34:51,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:34:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:34:51,257 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:51,304 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-22 16:34:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:34:51,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-22 16:34:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:51,311 INFO L225 Difference]: With dead ends: 59 [2021-12-22 16:34:51,311 INFO L226 Difference]: Without dead ends: 55 [2021-12-22 16:34:51,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:34:51,317 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:51,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:51,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-22 16:34:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-12-22 16:34:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-22 16:34:51,341 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2021-12-22 16:34:51,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:51,341 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-22 16:34:51,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-22 16:34:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:34:51,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:51,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:34:51,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:34:51,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:51,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:51,344 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2021-12-22 16:34:51,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:51,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605878411] [2021-12-22 16:34:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:51,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:51,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:51,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605878411] [2021-12-22 16:34:51,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605878411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:51,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:51,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:34:51,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112066465] [2021-12-22 16:34:51,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:51,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:34:51,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:51,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:34:51,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:34:51,408 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:51,447 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-12-22 16:34:51,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:34:51,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:34:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:51,449 INFO L225 Difference]: With dead ends: 58 [2021-12-22 16:34:51,449 INFO L226 Difference]: Without dead ends: 58 [2021-12-22 16:34:51,450 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 [2021-12-22 16:34:51,451 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:51,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-22 16:34:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-12-22 16:34:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 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) [2021-12-22 16:34:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-22 16:34:51,458 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-22 16:34:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:51,459 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-22 16:34:51,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-22 16:34:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:34:51,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:51,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:34:51,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:34:51,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:51,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:51,462 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2021-12-22 16:34:51,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:51,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080298300] [2021-12-22 16:34:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:51,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:51,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:51,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080298300] [2021-12-22 16:34:51,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080298300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:51,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:51,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:34:51,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300607720] [2021-12-22 16:34:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:51,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:34:51,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:51,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:34:51,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:34:51,517 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:51,553 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-12-22 16:34:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:34:51,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:34:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:51,555 INFO L225 Difference]: With dead ends: 32 [2021-12-22 16:34:51,555 INFO L226 Difference]: Without dead ends: 32 [2021-12-22 16:34:51,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:34:51,557 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:51,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:51,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-22 16:34:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-22 16:34:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-22 16:34:51,562 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-22 16:34:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:51,563 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-22 16:34:51,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-22 16:34:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:34:51,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:51,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:34:51,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 16:34:51,565 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2021-12-22 16:34:51,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:51,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947841770] [2021-12-22 16:34:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:51,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:51,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947841770] [2021-12-22 16:34:51,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947841770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:51,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:51,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:34:51,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015826285] [2021-12-22 16:34:51,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:51,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:34:51,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:34:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:34:51,642 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:51,701 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-12-22 16:34:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:34:51,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:34:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:51,702 INFO L225 Difference]: With dead ends: 55 [2021-12-22 16:34:51,702 INFO L226 Difference]: Without dead ends: 55 [2021-12-22 16:34:51,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:34:51,703 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:51,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-22 16:34:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-12-22 16:34:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 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) [2021-12-22 16:34:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-22 16:34:51,708 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-22 16:34:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:51,708 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-22 16:34:51,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-22 16:34:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:34:51,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:51,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:51,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 16:34:51,709 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:51,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-12-22 16:34:51,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:51,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64940859] [2021-12-22 16:34:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:51,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:51,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:51,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64940859] [2021-12-22 16:34:51,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64940859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:51,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:51,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:34:51,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530820158] [2021-12-22 16:34:51,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:51,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:34:51,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:51,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:34:51,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:34:51,735 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:51,747 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-22 16:34:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:34:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 16:34:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:51,748 INFO L225 Difference]: With dead ends: 35 [2021-12-22 16:34:51,748 INFO L226 Difference]: Without dead ends: 35 [2021-12-22 16:34:51,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:34:51,749 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:51,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-22 16:34:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-12-22 16:34:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-22 16:34:51,752 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2021-12-22 16:34:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:51,752 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-22 16:34:51,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-22 16:34:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:34:51,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:51,753 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:51,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 16:34:51,753 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:51,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:51,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2021-12-22 16:34:51,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:51,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211303864] [2021-12-22 16:34:51,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:51,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:51,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:51,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211303864] [2021-12-22 16:34:51,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211303864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:51,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563196730] [2021-12-22 16:34:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:51,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:51,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:51,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:34:51,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:34:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:51,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:34:51,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:51,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:51,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563196730] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:51,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:51,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-22 16:34:51,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181263144] [2021-12-22 16:34:51,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:51,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:34:51,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:51,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:34:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:34:51,932 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-12-22 16:34:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:51,978 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-12-22 16:34:51,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:34:51,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) Word has length 10 [2021-12-22 16:34:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:51,980 INFO L225 Difference]: With dead ends: 109 [2021-12-22 16:34:51,980 INFO L226 Difference]: Without dead ends: 109 [2021-12-22 16:34:51,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:34:51,981 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 147 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:51,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 104 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-22 16:34:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 47. [2021-12-22 16:34:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.375) internal successors, (55), 46 states have internal predecessors, (55), 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) [2021-12-22 16:34:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-22 16:34:51,985 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 10 [2021-12-22 16:34:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:51,985 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-22 16:34:51,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-12-22 16:34:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-22 16:34:51,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 16:34:51,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:51,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:52,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 16:34:52,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 16:34:52,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2021-12-22 16:34:52,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:52,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247839258] [2021-12-22 16:34:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:52,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:52,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:52,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247839258] [2021-12-22 16:34:52,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247839258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:52,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331666016] [2021-12-22 16:34:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:52,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:52,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:52,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:34:52,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:34:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 16:34:52,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:52,397 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:34:52,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-22 16:34:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:52,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:52,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331666016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:52,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:52,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-22 16:34:52,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123138427] [2021-12-22 16:34:52,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:52,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:34:52,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:52,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:34:52,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:34:52,546 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:52,685 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2021-12-22 16:34:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:34:52,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-22 16:34:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:52,686 INFO L225 Difference]: With dead ends: 108 [2021-12-22 16:34:52,686 INFO L226 Difference]: Without dead ends: 108 [2021-12-22 16:34:52,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:34:52,687 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 297 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:52,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 87 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:52,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-22 16:34:52,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 48. [2021-12-22 16:34:52,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-22 16:34:52,691 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 11 [2021-12-22 16:34:52,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:52,691 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-22 16:34:52,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:52,691 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-22 16:34:52,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 16:34:52,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:52,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:52,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:52,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-22 16:34:52,908 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:52,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:52,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2021-12-22 16:34:52,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:52,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598670573] [2021-12-22 16:34:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:52,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:52,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:52,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598670573] [2021-12-22 16:34:52,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598670573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:52,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237837080] [2021-12-22 16:34:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:52,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:52,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:52,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:34:52,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:34:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:52,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:34:52,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:53,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:53,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237837080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:53,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:53,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-22 16:34:53,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538950205] [2021-12-22 16:34:53,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:53,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:34:53,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:34:53,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:34:53,074 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2021-12-22 16:34:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:53,102 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-12-22 16:34:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:34:53,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-22 16:34:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:53,104 INFO L225 Difference]: With dead ends: 48 [2021-12-22 16:34:53,104 INFO L226 Difference]: Without dead ends: 48 [2021-12-22 16:34:53,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:34:53,105 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:53,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 87 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-22 16:34:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-22 16:34:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 47 states have internal predecessors, (51), 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) [2021-12-22 16:34:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-12-22 16:34:53,107 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 12 [2021-12-22 16:34:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:53,108 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-12-22 16:34:53,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2021-12-22 16:34:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-12-22 16:34:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 16:34:53,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:53,108 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2021-12-22 16:34:53,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 16:34:53,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:53,325 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:53,325 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2021-12-22 16:34:53,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:53,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316963689] [2021-12-22 16:34:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:53,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:53,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:53,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316963689] [2021-12-22 16:34:53,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316963689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:53,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474542325] [2021-12-22 16:34:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:34:53,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:53,413 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:34:53,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:34:53,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:34:53,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:34:53,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:34:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:53,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:54,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474542325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:54,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:54,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2021-12-22 16:34:54,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385826845] [2021-12-22 16:34:54,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:54,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 16:34:54,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:54,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 16:34:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:34:54,063 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 19 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 19 states have internal predecessors, (71), 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) [2021-12-22 16:34:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:54,211 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-12-22 16:34:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:34:54,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-22 16:34:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:54,212 INFO L225 Difference]: With dead ends: 96 [2021-12-22 16:34:54,212 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 16:34:54,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-12-22 16:34:54,213 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 217 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:54,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 168 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 16:34:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 47. [2021-12-22 16:34:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 46 states have internal predecessors, (50), 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) [2021-12-22 16:34:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-12-22 16:34:54,216 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 25 [2021-12-22 16:34:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:54,216 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-12-22 16:34:54,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 19 states have internal predecessors, (71), 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) [2021-12-22 16:34:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-12-22 16:34:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:34:54,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:54,217 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1] [2021-12-22 16:34:54,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:54,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:54,427 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:54,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1794938034, now seen corresponding path program 2 times [2021-12-22 16:34:54,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:54,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790186208] [2021-12-22 16:34:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:54,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-22 16:34:54,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:54,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790186208] [2021-12-22 16:34:54,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790186208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:54,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:54,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:34:54,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095416925] [2021-12-22 16:34:54,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:54,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:34:54,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:34:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:34:54,482 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:54,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:54,508 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-12-22 16:34:54,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:34:54,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 16:34:54,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:54,509 INFO L225 Difference]: With dead ends: 46 [2021-12-22 16:34:54,509 INFO L226 Difference]: Without dead ends: 46 [2021-12-22 16:34:54,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:34:54,509 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:54,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 33 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-22 16:34:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-12-22 16:34:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 43 states have internal predecessors, (47), 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) [2021-12-22 16:34:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-12-22 16:34:54,523 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 26 [2021-12-22 16:34:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:54,523 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-12-22 16:34:54,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-12-22 16:34:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 16:34:54,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:54,524 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:54,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 16:34:54,525 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash 191446135, now seen corresponding path program 2 times [2021-12-22 16:34:54,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:54,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362500465] [2021-12-22 16:34:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:54,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:54,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:54,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362500465] [2021-12-22 16:34:54,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362500465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:54,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56554385] [2021-12-22 16:34:54,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:34:54,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:54,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:54,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:34:54,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:34:54,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:34:54,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:34:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:34:54,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:54,662 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:54,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-12-22 16:34:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 16:34:54,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:54,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56554385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:54,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:34:54,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 16:34:54,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134613639] [2021-12-22 16:34:54,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:54,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:34:54,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:54,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:34:54,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:34:54,702 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2021-12-22 16:34:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:54,710 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-12-22 16:34:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:34:54,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 27 [2021-12-22 16:34:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:54,710 INFO L225 Difference]: With dead ends: 42 [2021-12-22 16:34:54,710 INFO L226 Difference]: Without dead ends: 42 [2021-12-22 16:34:54,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:34:54,711 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:54,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-22 16:34:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-22 16:34:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 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) [2021-12-22 16:34:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-22 16:34:54,712 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 27 [2021-12-22 16:34:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:54,712 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-22 16:34:54,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2021-12-22 16:34:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-22 16:34:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 16:34:54,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:54,713 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:54,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:54,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 16:34:54,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:54,920 INFO L85 PathProgramCache]: Analyzing trace with hash 191446136, now seen corresponding path program 1 times [2021-12-22 16:34:54,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:54,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592622055] [2021-12-22 16:34:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:54,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:54,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592622055] [2021-12-22 16:34:54,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592622055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:54,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068764153] [2021-12-22 16:34:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:54,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:54,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:54,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:34:54,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:34:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:55,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:34:55,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:55,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:55,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068764153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:55,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:55,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-12-22 16:34:55,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085057823] [2021-12-22 16:34:55,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:55,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 16:34:55,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:55,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 16:34:55,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:34:55,251 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 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) [2021-12-22 16:34:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:55,297 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-12-22 16:34:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:34:55,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 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 27 [2021-12-22 16:34:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:55,299 INFO L225 Difference]: With dead ends: 72 [2021-12-22 16:34:55,299 INFO L226 Difference]: Without dead ends: 72 [2021-12-22 16:34:55,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:34:55,301 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:55,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-22 16:34:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-22 16:34:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 71 states have internal predecessors, (75), 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) [2021-12-22 16:34:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-12-22 16:34:55,310 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 27 [2021-12-22 16:34:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:55,310 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-12-22 16:34:55,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 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) [2021-12-22 16:34:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-12-22 16:34:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 16:34:55,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:55,315 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:55,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:55,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:55,533 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash 484543896, now seen corresponding path program 2 times [2021-12-22 16:34:55,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:55,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925043713] [2021-12-22 16:34:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:55,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:55,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:55,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925043713] [2021-12-22 16:34:55,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925043713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:55,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078502631] [2021-12-22 16:34:55,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:34:55,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:55,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:55,664 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:34:55,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:34:55,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:34:55,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:34:55,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 16:34:55,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:55,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-22 16:34:55,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 16:34:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-22 16:34:56,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:34:56,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078502631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:56,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:34:56,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 14 [2021-12-22 16:34:56,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160962571] [2021-12-22 16:34:56,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:56,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:34:56,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:56,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:34:56,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:34:56,038 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2021-12-22 16:34:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:56,055 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2021-12-22 16:34:56,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:34:56,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 57 [2021-12-22 16:34:56,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:56,056 INFO L225 Difference]: With dead ends: 128 [2021-12-22 16:34:56,056 INFO L226 Difference]: Without dead ends: 128 [2021-12-22 16:34:56,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:34:56,057 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:56,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:56,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-22 16:34:56,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-12-22 16:34:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 123 states have (on average 1.056910569105691) internal successors, (130), 125 states have internal predecessors, (130), 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) [2021-12-22 16:34:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-12-22 16:34:56,062 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 57 [2021-12-22 16:34:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:56,063 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-12-22 16:34:56,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2021-12-22 16:34:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-12-22 16:34:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 16:34:56,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:56,065 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:56,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-22 16:34:56,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:56,281 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:56,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1026867069, now seen corresponding path program 1 times [2021-12-22 16:34:56,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:56,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067067703] [2021-12-22 16:34:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:56,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-22 16:34:56,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:56,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067067703] [2021-12-22 16:34:56,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067067703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:56,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312101500] [2021-12-22 16:34:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:56,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:56,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:56,365 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:34:56,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:34:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:56,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:34:56,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:56,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:57,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312101500] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:57,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:57,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 13, 13] total 27 [2021-12-22 16:34:57,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967589260] [2021-12-22 16:34:57,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:57,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 16:34:57,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:57,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 16:34:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2021-12-22 16:34:57,028 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 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) [2021-12-22 16:34:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:57,916 INFO L93 Difference]: Finished difference Result 252 states and 257 transitions. [2021-12-22 16:34:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 16:34:57,916 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 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 63 [2021-12-22 16:34:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:57,917 INFO L225 Difference]: With dead ends: 252 [2021-12-22 16:34:57,917 INFO L226 Difference]: Without dead ends: 252 [2021-12-22 16:34:57,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1681, Invalid=3289, Unknown=0, NotChecked=0, Total=4970 [2021-12-22 16:34:57,919 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 482 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:57,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 52 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:34:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-22 16:34:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2021-12-22 16:34:57,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 244 states have (on average 1.028688524590164) internal successors, (251), 246 states have internal predecessors, (251), 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) [2021-12-22 16:34:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2021-12-22 16:34:57,922 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 63 [2021-12-22 16:34:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:57,922 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2021-12-22 16:34:57,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 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) [2021-12-22 16:34:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2021-12-22 16:34:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-22 16:34:57,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:57,923 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:57,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:58,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 16:34:58,139 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:34:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:58,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1510297113, now seen corresponding path program 1 times [2021-12-22 16:34:58,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:58,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854470833] [2021-12-22 16:34:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:58,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:58,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:58,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854470833] [2021-12-22 16:34:58,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854470833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:58,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79113740] [2021-12-22 16:34:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:58,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:58,540 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:34:58,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:34:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:58,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 16:34:58,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:59,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:35:00,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79113740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:00,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:00,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 71 [2021-12-22 16:35:00,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810220114] [2021-12-22 16:35:00,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:00,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-22 16:35:00,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-22 16:35:00,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2050, Invalid=2920, Unknown=0, NotChecked=0, Total=4970 [2021-12-22 16:35:00,658 INFO L87 Difference]: Start difference. First operand 247 states and 251 transitions. Second operand has 71 states, 71 states have (on average 4.929577464788732) internal successors, (350), 71 states have internal predecessors, (350), 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) [2021-12-22 16:35:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:00,847 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2021-12-22 16:35:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 16:35:00,848 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.929577464788732) internal successors, (350), 71 states have internal predecessors, (350), 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 126 [2021-12-22 16:35:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:00,850 INFO L225 Difference]: With dead ends: 347 [2021-12-22 16:35:00,850 INFO L226 Difference]: Without dead ends: 347 [2021-12-22 16:35:00,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2050, Invalid=2920, Unknown=0, NotChecked=0, Total=4970 [2021-12-22 16:35:00,853 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 128 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:00,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 193 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:35:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-22 16:35:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2021-12-22 16:35:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 344 states have (on average 1.0203488372093024) internal successors, (351), 346 states have internal predecessors, (351), 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) [2021-12-22 16:35:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 351 transitions. [2021-12-22 16:35:00,858 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 351 transitions. Word has length 126 [2021-12-22 16:35:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:00,859 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 351 transitions. [2021-12-22 16:35:00,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.929577464788732) internal successors, (350), 71 states have internal predecessors, (350), 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) [2021-12-22 16:35:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 351 transitions. [2021-12-22 16:35:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-22 16:35:00,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:00,861 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:00,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-22 16:35:01,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 16:35:01,078 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash -79033337, now seen corresponding path program 2 times [2021-12-22 16:35:01,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:01,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419021229] [2021-12-22 16:35:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:01,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2021-12-22 16:35:01,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:01,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419021229] [2021-12-22 16:35:01,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419021229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:01,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264786182] [2021-12-22 16:35:01,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:01,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:01,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:01,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:01,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:35:01,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:35:01,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:01,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:35:01,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2513 trivial. 0 not checked. [2021-12-22 16:35:02,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:02,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264786182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:02,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:02,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 16:35:02,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567377929] [2021-12-22 16:35:02,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:02,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:02,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:02,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:35:02,247 INFO L87 Difference]: Start difference. First operand 347 states and 351 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:02,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:02,249 INFO L93 Difference]: Finished difference Result 348 states and 351 transitions. [2021-12-22 16:35:02,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:35:02,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-12-22 16:35:02,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:02,250 INFO L225 Difference]: With dead ends: 348 [2021-12-22 16:35:02,251 INFO L226 Difference]: Without dead ends: 346 [2021-12-22 16:35:02,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:35:02,251 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:02,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-22 16:35:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-22 16:35:02,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2021-12-22 16:35:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 343 states have (on average 1.0174927113702623) internal successors, (349), 345 states have internal predecessors, (349), 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) [2021-12-22 16:35:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 349 transitions. [2021-12-22 16:35:02,256 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 349 transitions. Word has length 176 [2021-12-22 16:35:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:02,256 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 349 transitions. [2021-12-22 16:35:02,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 349 transitions. [2021-12-22 16:35:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-22 16:35:02,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:02,258 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:02,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:02,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 16:35:02,471 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:02,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1845056352, now seen corresponding path program 1 times [2021-12-22 16:35:02,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:02,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764651713] [2021-12-22 16:35:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:02,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2514 trivial. 0 not checked. [2021-12-22 16:35:02,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:02,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764651713] [2021-12-22 16:35:02,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764651713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:02,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200881473] [2021-12-22 16:35:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:02,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:02,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:02,615 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:02,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 16:35:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:02,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 16:35:02,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2514 trivial. 0 not checked. [2021-12-22 16:35:03,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2021-12-22 16:35:03,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200881473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:03,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:03,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2021-12-22 16:35:03,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846621042] [2021-12-22 16:35:03,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:03,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:35:03,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:03,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:35:03,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:35:03,381 INFO L87 Difference]: Start difference. First operand 346 states and 349 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:03,457 INFO L93 Difference]: Finished difference Result 698 states and 703 transitions. [2021-12-22 16:35:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:35:03,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-12-22 16:35:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:03,459 INFO L225 Difference]: With dead ends: 698 [2021-12-22 16:35:03,459 INFO L226 Difference]: Without dead ends: 698 [2021-12-22 16:35:03,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:03,459 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:03,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 120 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-12-22 16:35:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 694. [2021-12-22 16:35:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 691 states have (on average 1.0173661360347324) internal successors, (703), 693 states have internal predecessors, (703), 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) [2021-12-22 16:35:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 703 transitions. [2021-12-22 16:35:03,465 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 703 transitions. Word has length 177 [2021-12-22 16:35:03,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:03,466 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 703 transitions. [2021-12-22 16:35:03,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 703 transitions. [2021-12-22 16:35:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-12-22 16:35:03,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:03,468 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:03,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:03,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 16:35:03,668 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:03,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1138865693, now seen corresponding path program 1 times [2021-12-22 16:35:03,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:03,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062695857] [2021-12-22 16:35:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:03,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2021-12-22 16:35:03,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:03,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062695857] [2021-12-22 16:35:03,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062695857] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:03,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246442436] [2021-12-22 16:35:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:03,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:03,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:03,942 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:03,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 16:35:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:04,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 16:35:04,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:04,127 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:35:04,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-22 16:35:04,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 16:35:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2021-12-22 16:35:06,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2021-12-22 16:35:07,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246442436] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:07,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:07,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2021-12-22 16:35:07,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310282427] [2021-12-22 16:35:07,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:07,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:35:07,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:07,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:35:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:07,514 INFO L87 Difference]: Start difference. First operand 694 states and 703 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 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) [2021-12-22 16:35:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:07,565 INFO L93 Difference]: Finished difference Result 858 states and 866 transitions. [2021-12-22 16:35:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:35:07,565 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 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 334 [2021-12-22 16:35:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:07,567 INFO L225 Difference]: With dead ends: 858 [2021-12-22 16:35:07,568 INFO L226 Difference]: Without dead ends: 858 [2021-12-22 16:35:07,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:35:07,568 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:07,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-12-22 16:35:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2021-12-22 16:35:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 855 states have (on average 1.0128654970760234) internal successors, (866), 857 states have internal predecessors, (866), 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) [2021-12-22 16:35:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 866 transitions. [2021-12-22 16:35:07,576 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 866 transitions. Word has length 334 [2021-12-22 16:35:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:07,576 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 866 transitions. [2021-12-22 16:35:07,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 states have internal predecessors, (70), 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) [2021-12-22 16:35:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 866 transitions. [2021-12-22 16:35:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2021-12-22 16:35:07,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:07,584 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:07,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:07,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 16:35:07,799 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1652938709, now seen corresponding path program 2 times [2021-12-22 16:35:07,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:07,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765961540] [2021-12-22 16:35:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:07,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 0 proven. 31150 refuted. 0 times theorem prover too weak. 10050 trivial. 0 not checked. [2021-12-22 16:35:08,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:08,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765961540] [2021-12-22 16:35:08,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765961540] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:08,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346913524] [2021-12-22 16:35:08,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:08,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:08,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:08,091 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:08,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 16:35:08,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:35:08,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1976 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 16:35:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 31140 proven. 12 refuted. 0 times theorem prover too weak. 10048 trivial. 0 not checked. [2021-12-22 16:35:10,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:10,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-22 16:35:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 31140 proven. 12 refuted. 0 times theorem prover too weak. 10048 trivial. 0 not checked. [2021-12-22 16:35:13,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346913524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:13,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:13,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2021-12-22 16:35:13,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899620797] [2021-12-22 16:35:13,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:13,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 16:35:13,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 16:35:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-12-22 16:35:13,418 INFO L87 Difference]: Start difference. First operand 858 states and 866 transitions. Second operand has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 states have internal predecessors, (171), 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) [2021-12-22 16:35:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:13,634 INFO L93 Difference]: Finished difference Result 1036 states and 1043 transitions. [2021-12-22 16:35:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:35:13,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 states have internal predecessors, (171), 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 678 [2021-12-22 16:35:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:13,637 INFO L225 Difference]: With dead ends: 1036 [2021-12-22 16:35:13,637 INFO L226 Difference]: Without dead ends: 1036 [2021-12-22 16:35:13,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 1342 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-12-22 16:35:13,638 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 294 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:13,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 252 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-12-22 16:35:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 865. [2021-12-22 16:35:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 862 states have (on average 1.0104408352668213) internal successors, (871), 864 states have internal predecessors, (871), 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) [2021-12-22 16:35:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 871 transitions. [2021-12-22 16:35:13,645 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 871 transitions. Word has length 678 [2021-12-22 16:35:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:13,646 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 871 transitions. [2021-12-22 16:35:13,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.142857142857142) internal successors, (171), 21 states have internal predecessors, (171), 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) [2021-12-22 16:35:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 871 transitions. [2021-12-22 16:35:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2021-12-22 16:35:13,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:13,659 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2021-12-22 16:35:13,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:13,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:13,876 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1289503496, now seen corresponding path program 2 times [2021-12-22 16:35:13,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:13,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816811031] [2021-12-22 16:35:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:13,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2021-12-22 16:35:14,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:14,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816811031] [2021-12-22 16:35:14,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816811031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:14,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087460421] [2021-12-22 16:35:14,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:35:14,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:14,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:14,411 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:14,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 16:35:14,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:35:14,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 2431 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 16:35:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:14,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 16:35:14,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-22 16:35:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2021-12-22 16:35:19,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:35:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2021-12-22 16:35:23,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087460421] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:35:23,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:35:23,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2021-12-22 16:35:23,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594155381] [2021-12-22 16:35:23,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:35:23,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 16:35:23,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:23,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 16:35:23,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:35:23,368 INFO L87 Difference]: Start difference. First operand 865 states and 871 transitions. Second operand has 18 states, 17 states have (on average 10.411764705882353) internal successors, (177), 18 states have internal predecessors, (177), 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) [2021-12-22 16:35:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:23,632 INFO L93 Difference]: Finished difference Result 1869 states and 1886 transitions. [2021-12-22 16:35:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:35:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 10.411764705882353) internal successors, (177), 18 states have internal predecessors, (177), 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 835 [2021-12-22 16:35:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:23,637 INFO L225 Difference]: With dead ends: 1869 [2021-12-22 16:35:23,638 INFO L226 Difference]: Without dead ends: 1869 [2021-12-22 16:35:23,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1659 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-12-22 16:35:23,638 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 51 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:23,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 361 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:35:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-12-22 16:35:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1864. [2021-12-22 16:35:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1861 states have (on average 1.0107469102632993) internal successors, (1881), 1863 states have internal predecessors, (1881), 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) [2021-12-22 16:35:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 1881 transitions. [2021-12-22 16:35:23,662 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 1881 transitions. Word has length 835 [2021-12-22 16:35:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:23,663 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 1881 transitions. [2021-12-22 16:35:23,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 10.411764705882353) internal successors, (177), 18 states have internal predecessors, (177), 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) [2021-12-22 16:35:23,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 1881 transitions. [2021-12-22 16:35:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2021-12-22 16:35:23,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:23,669 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-22 16:35:23,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:23,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:23,888 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:23,889 INFO L85 PathProgramCache]: Analyzing trace with hash 980978921, now seen corresponding path program 3 times [2021-12-22 16:35:23,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:23,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242094625] [2021-12-22 16:35:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:23,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 64507 backedges. 0 proven. 51915 refuted. 0 times theorem prover too weak. 12592 trivial. 0 not checked. [2021-12-22 16:35:24,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242094625] [2021-12-22 16:35:24,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242094625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079630685] [2021-12-22 16:35:24,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:35:24,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:24,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:24,293 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:24,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 16:35:24,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 16:35:24,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:35:24,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 16:35:24,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:24,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:35:24,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-22 16:35:24,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 16:35:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 64507 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 64493 trivial. 0 not checked. [2021-12-22 16:35:27,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:27,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079630685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:27,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:27,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-12-22 16:35:27,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815716054] [2021-12-22 16:35:27,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:27,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:35:27,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:35:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:35:27,776 INFO L87 Difference]: Start difference. First operand 1864 states and 1881 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:27,823 INFO L93 Difference]: Finished difference Result 1862 states and 1879 transitions. [2021-12-22 16:35:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:35:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 857 [2021-12-22 16:35:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:27,827 INFO L225 Difference]: With dead ends: 1862 [2021-12-22 16:35:27,827 INFO L226 Difference]: Without dead ends: 1862 [2021-12-22 16:35:27,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 865 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:35:27,828 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:27,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 33 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:35:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-12-22 16:35:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 863. [2021-12-22 16:35:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.0081206496519721) internal successors, (869), 862 states have internal predecessors, (869), 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) [2021-12-22 16:35:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 869 transitions. [2021-12-22 16:35:27,840 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 869 transitions. Word has length 857 [2021-12-22 16:35:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:27,841 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 869 transitions. [2021-12-22 16:35:27,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 869 transitions. [2021-12-22 16:35:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2021-12-22 16:35:27,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:35:27,846 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:27,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-22 16:35:28,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:28,063 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-22 16:35:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:35:28,063 INFO L85 PathProgramCache]: Analyzing trace with hash 77125929, now seen corresponding path program 1 times [2021-12-22 16:35:28,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:35:28,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809427524] [2021-12-22 16:35:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:28,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:35:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 0 proven. 51915 refuted. 0 times theorem prover too weak. 12605 trivial. 0 not checked. [2021-12-22 16:35:28,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:35:28,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809427524] [2021-12-22 16:35:28,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809427524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:35:28,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735707812] [2021-12-22 16:35:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:35:28,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:35:28,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:35:28,474 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:35:28,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 16:35:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:35:28,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 2508 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 16:35:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:35:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64520 trivial. 0 not checked. [2021-12-22 16:35:34,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:35:34,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735707812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:35:34,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:35:34,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-22 16:35:34,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795273339] [2021-12-22 16:35:34,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:35:34,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:35:34,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:35:34,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:35:34,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:34,510 INFO L87 Difference]: Start difference. First operand 863 states and 869 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:35:34,512 INFO L93 Difference]: Finished difference Result 862 states and 868 transitions. [2021-12-22 16:35:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:35:34,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 862 [2021-12-22 16:35:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:35:34,513 INFO L225 Difference]: With dead ends: 862 [2021-12-22 16:35:34,513 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 16:35:34,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 16:35:34,514 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:35:34,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-12-22 16:35:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 16:35:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 16:35:34,514 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) [2021-12-22 16:35:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 16:35:34,515 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 862 [2021-12-22 16:35:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:35:34,515 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 16:35:34,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:35:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 16:35:34,515 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 16:35:34,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-12-22 16:35:34,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-12-22 16:35:34,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-12-22 16:35:34,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (4 of 8 remaining) [2021-12-22 16:35:34,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (3 of 8 remaining) [2021-12-22 16:35:34,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (2 of 8 remaining) [2021-12-22 16:35:34,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (1 of 8 remaining) [2021-12-22 16:35:34,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-12-22 16:35:34,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 16:35:34,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-22 16:35:34,734 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:35:34,735 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 16:35:34,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:35:34 BoogieIcfgContainer [2021-12-22 16:35:34,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 16:35:34,737 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 16:35:34,738 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 16:35:34,738 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 16:35:34,738 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:34:50" (3/4) ... [2021-12-22 16:35:34,740 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 16:35:34,753 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-12-22 16:35:34,753 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-22 16:35:34,753 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 16:35:34,753 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 16:35:34,786 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 16:35:34,789 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 16:35:34,790 INFO L158 Benchmark]: Toolchain (without parser) took 44270.58ms. Allocated memory was 115.3MB in the beginning and 509.6MB in the end (delta: 394.3MB). Free memory was 84.7MB in the beginning and 312.4MB in the end (delta: -227.7MB). Peak memory consumption was 167.1MB. Max. memory is 16.1GB. [2021-12-22 16:35:34,790 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 86.0MB. Free memory is still 50.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:35:34,790 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.54ms. Allocated memory is still 115.3MB. Free memory was 84.7MB in the beginning and 91.9MB in the end (delta: -7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 16:35:34,791 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.11ms. Allocated memory is still 115.3MB. Free memory was 91.9MB in the beginning and 90.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 16:35:34,791 INFO L158 Benchmark]: Boogie Preprocessor took 31.17ms. Allocated memory is still 115.3MB. Free memory was 90.7MB in the beginning and 89.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:35:34,791 INFO L158 Benchmark]: RCFGBuilder took 204.17ms. Allocated memory is still 115.3MB. Free memory was 89.2MB in the beginning and 78.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 16:35:34,794 INFO L158 Benchmark]: TraceAbstraction took 43761.26ms. Allocated memory was 115.3MB in the beginning and 509.6MB in the end (delta: 394.3MB). Free memory was 78.2MB in the beginning and 315.5MB in the end (delta: -237.3MB). Peak memory consumption was 157.5MB. Max. memory is 16.1GB. [2021-12-22 16:35:34,794 INFO L158 Benchmark]: Witness Printer took 52.31ms. Allocated memory is still 509.6MB. Free memory was 315.5MB in the beginning and 312.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 16:35:34,795 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 86.0MB. Free memory is still 50.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.54ms. Allocated memory is still 115.3MB. Free memory was 84.7MB in the beginning and 91.9MB in the end (delta: -7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.11ms. Allocated memory is still 115.3MB. Free memory was 91.9MB in the beginning and 90.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.17ms. Allocated memory is still 115.3MB. Free memory was 90.7MB in the beginning and 89.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 204.17ms. Allocated memory is still 115.3MB. Free memory was 89.2MB in the beginning and 78.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 43761.26ms. Allocated memory was 115.3MB in the beginning and 509.6MB in the end (delta: 394.3MB). Free memory was 78.2MB in the beginning and 315.5MB in the end (delta: -237.3MB). Peak memory consumption was 157.5MB. Max. memory is 16.1GB. * Witness Printer took 52.31ms. Allocated memory is still 509.6MB. Free memory was 315.5MB in the beginning and 312.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 43.7s, OverallIterations: 22, TraceHistogramMax: 160, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2097 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2097 mSDsluCounter, 1966 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 21 IncrementalHoareTripleChecker+Unchecked, 1429 mSDsCounter, 289 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1705 IncrementalHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 289 mSolverCounterUnsat, 537 mSDtfsCounter, 1705 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6761 GetRequests, 6438 SyntacticMatches, 2 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1864occurred in iteration=20, InterpolantAutomatonStates: 204, 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, 22 MinimizatonAttempts, 1432 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 34.0s InterpolantComputationTime, 8610 NumberOfCodeBlocks, 7533 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 10859 ConstructedInterpolants, 1034 QuantifiedInterpolants, 126032 SizeOfPredicates, 38 NumberOfNonLiveVariables, 9737 ConjunctsInSsa, 213 ConjunctsInUnsatCore, 49 InterpolantComputations, 11 PerfectInterpolantSequences, 312583/623306 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 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 16:35:34,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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