./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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/ArraysOfVariableLength6.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 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:29:07,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:29:07,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:29:07,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:29:07,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:29:07,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:29:07,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:29:07,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:29:07,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:29:07,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:29:07,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:29:07,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:29:07,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:29:07,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:29:07,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:29:07,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:29:07,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:29:07,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:29:07,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:29:07,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:29:07,073 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:29:07,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:29:07,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:29:07,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:29:07,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:29:07,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:29:07,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:29:07,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:29:07,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:29:07,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:29:07,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:29:07,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:29:07,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:29:07,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:29:07,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:29:07,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:29:07,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:29:07,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:29:07,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:29:07,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:29:07,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:29:07,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:29:07,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:29:07,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:29:07,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:29:07,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:29:07,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:29:07,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:29:07,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:29:07,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:29:07,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:29:07,131 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:29:07,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:29:07,132 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:29:07,132 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:29:07,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:29:07,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:29:07,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:29:07,133 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:29:07,133 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:29:07,133 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:29:07,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:29:07,134 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:29:07,134 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:29:07,134 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:29:07,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:29:07,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:29:07,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:29:07,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:29:07,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:29:07,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:29:07,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:29:07,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:29:07,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2022-07-14 06:29:07,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:29:07,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:29:07,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:29:07,407 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:29:07,407 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:29:07,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2022-07-14 06:29:07,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1c3dd49f/1011f98548e6476fba4f836e5a412414/FLAG6a936fa99 [2022-07-14 06:29:07,853 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:29:07,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2022-07-14 06:29:07,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1c3dd49f/1011f98548e6476fba4f836e5a412414/FLAG6a936fa99 [2022-07-14 06:29:08,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1c3dd49f/1011f98548e6476fba4f836e5a412414 [2022-07-14 06:29:08,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:29:08,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:29:08,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:29:08,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:29:08,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:29:08,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23e8041e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08, skipping insertion in model container [2022-07-14 06:29:08,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:29:08,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:29:08,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:29:08,460 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:29:08,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:29:08,486 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:29:08,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08 WrapperNode [2022-07-14 06:29:08,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:29:08,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:29:08,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:29:08,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:29:08,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,521 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-07-14 06:29:08,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:29:08,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:29:08,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:29:08,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:29:08,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:29:08,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:29:08,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:29:08,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:29:08,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (1/1) ... [2022-07-14 06:29:08,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:29:08,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:08,587 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) [2022-07-14 06:29:08,596 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 [2022-07-14 06:29:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:29:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:29:08,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:29:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:29:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:29:08,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:29:08,660 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:29:08,661 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:29:08,802 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:29:08,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:29:08,818 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-14 06:29:08,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:29:08 BoogieIcfgContainer [2022-07-14 06:29:08,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:29:08,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:29:08,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:29:08,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:29:08,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:29:08" (1/3) ... [2022-07-14 06:29:08,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a6d5e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:29:08, skipping insertion in model container [2022-07-14 06:29:08,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:29:08" (2/3) ... [2022-07-14 06:29:08,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a6d5e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:29:08, skipping insertion in model container [2022-07-14 06:29:08,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:29:08" (3/3) ... [2022-07-14 06:29:08,844 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2022-07-14 06:29:08,857 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:29:08,863 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-07-14 06:29:08,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:29:08,939 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6d871cee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3791c1c1 [2022-07-14 06:29:08,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-14 06:29:08,943 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) [2022-07-14 06:29:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-14 06:29:08,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:08,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-14 06:29:08,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-07-14 06:29:08,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:08,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493148274] [2022-07-14 06:29:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:08,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:09,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:09,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493148274] [2022-07-14 06:29:09,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493148274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:09,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:29:09,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:29:09,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441509535] [2022-07-14 06:29:09,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:09,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:29:09,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:29:09,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:29:09,169 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) [2022-07-14 06:29:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:09,208 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-07-14 06:29:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:29:09,211 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 [2022-07-14 06:29:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:09,217 INFO L225 Difference]: With dead ends: 59 [2022-07-14 06:29:09,217 INFO L226 Difference]: Without dead ends: 55 [2022-07-14 06:29:09,220 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:09,225 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:09,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-14 06:29:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-07-14 06:29:09,258 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) [2022-07-14 06:29:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-07-14 06:29:09,260 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-07-14 06:29:09,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:09,261 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-07-14 06:29:09,261 INFO L496 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) [2022-07-14 06:29:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-07-14 06:29:09,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:29:09,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:09,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:29:09,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:29:09,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:09,263 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-07-14 06:29:09,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:09,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157377910] [2022-07-14 06:29:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:09,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:09,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157377910] [2022-07-14 06:29:09,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157377910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:09,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:29:09,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:29:09,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495648439] [2022-07-14 06:29:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:09,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:29:09,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:09,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:29:09,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:29:09,299 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) [2022-07-14 06:29:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:09,337 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-07-14 06:29:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:29:09,337 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 [2022-07-14 06:29:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:09,338 INFO L225 Difference]: With dead ends: 58 [2022-07-14 06:29:09,338 INFO L226 Difference]: Without dead ends: 58 [2022-07-14 06:29:09,339 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:09,340 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:09,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-14 06:29:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-07-14 06:29:09,345 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) [2022-07-14 06:29:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-14 06:29:09,346 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-14 06:29:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:09,346 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-14 06:29:09,346 INFO L496 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) [2022-07-14 06:29:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-14 06:29:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:29:09,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:09,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:29:09,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:29:09,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-07-14 06:29:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:09,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125591426] [2022-07-14 06:29:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:09,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:09,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:09,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125591426] [2022-07-14 06:29:09,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125591426] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:09,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:29:09,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:29:09,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727879829] [2022-07-14 06:29:09,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:09,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:29:09,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:29:09,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:29:09,391 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) [2022-07-14 06:29:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:09,425 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-07-14 06:29:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:29:09,426 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 [2022-07-14 06:29:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:09,429 INFO L225 Difference]: With dead ends: 32 [2022-07-14 06:29:09,429 INFO L226 Difference]: Without dead ends: 32 [2022-07-14 06:29:09,429 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:09,431 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:09,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-14 06:29:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-14 06:29:09,435 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) [2022-07-14 06:29:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-14 06:29:09,436 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-07-14 06:29:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:09,436 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-14 06:29:09,437 INFO L496 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) [2022-07-14 06:29:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-14 06:29:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:29:09,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:09,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:29:09,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:29:09,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-07-14 06:29:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:09,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147921570] [2022-07-14 06:29:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:09,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147921570] [2022-07-14 06:29:09,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147921570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:09,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:29:09,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:29:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310795278] [2022-07-14 06:29:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:09,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:29:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:09,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:29:09,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:29:09,498 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) [2022-07-14 06:29:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:09,574 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-07-14 06:29:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:29:09,575 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 [2022-07-14 06:29:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:09,577 INFO L225 Difference]: With dead ends: 55 [2022-07-14 06:29:09,579 INFO L226 Difference]: Without dead ends: 55 [2022-07-14 06:29:09,579 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:09,582 INFO L413 NwaCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:29:09,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:29:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-14 06:29:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-07-14 06:29:09,595 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) [2022-07-14 06:29:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-14 06:29:09,597 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-14 06:29:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:09,597 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-14 06:29:09,598 INFO L496 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) [2022-07-14 06:29:09,598 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-14 06:29:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:29:09,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:09,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:09,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:29:09,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-07-14 06:29:09,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:09,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606008098] [2022-07-14 06:29:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:09,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:09,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:09,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606008098] [2022-07-14 06:29:09,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606008098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:09,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:29:09,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:29:09,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221249166] [2022-07-14 06:29:09,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:09,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:29:09,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:29:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:29:09,649 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) [2022-07-14 06:29:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:09,665 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-07-14 06:29:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:29:09,666 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 [2022-07-14 06:29:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:09,666 INFO L225 Difference]: With dead ends: 35 [2022-07-14 06:29:09,667 INFO L226 Difference]: Without dead ends: 35 [2022-07-14 06:29:09,667 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:09,668 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:09,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:09,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-14 06:29:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-07-14 06:29:09,671 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) [2022-07-14 06:29:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-07-14 06:29:09,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2022-07-14 06:29:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:09,672 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-07-14 06:29:09,672 INFO L496 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) [2022-07-14 06:29:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-07-14 06:29:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:29:09,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:09,673 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:09,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:29:09,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:09,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-07-14 06:29:09,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:09,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613511271] [2022-07-14 06:29:09,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:09,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:09,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:09,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613511271] [2022-07-14 06:29:09,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613511271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:09,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627524199] [2022-07-14 06:29:09,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:09,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:09,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:09,717 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) [2022-07-14 06:29:09,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:29:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:09,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:29:09,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:09,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:09,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627524199] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:09,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:09,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-07-14 06:29:09,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47219570] [2022-07-14 06:29:09,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:09,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:29:09,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:09,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:29:09,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:29:09,915 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) [2022-07-14 06:29:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:09,974 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2022-07-14 06:29:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:29:09,975 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 [2022-07-14 06:29:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:09,977 INFO L225 Difference]: With dead ends: 109 [2022-07-14 06:29:09,977 INFO L226 Difference]: Without dead ends: 109 [2022-07-14 06:29:09,977 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:09,978 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:09,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 104 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-14 06:29:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 47. [2022-07-14 06:29:09,984 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) [2022-07-14 06:29:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-14 06:29:09,985 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 10 [2022-07-14 06:29:09,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:09,985 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-14 06:29:09,985 INFO L496 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) [2022-07-14 06:29:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-14 06:29:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:29:09,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:09,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:10,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:10,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-14 06:29:10,212 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-07-14 06:29:10,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:10,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848413626] [2022-07-14 06:29:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:10,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:10,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:10,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848413626] [2022-07-14 06:29:10,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848413626] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:10,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958372192] [2022-07-14 06:29:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:10,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:10,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:10,333 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) [2022-07-14 06:29:10,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:29:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-14 06:29:10,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:10,463 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:29:10,464 INFO L390 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 [2022-07-14 06:29:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:10,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:10,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958372192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:10,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:10,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-14 06:29:10,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040947667] [2022-07-14 06:29:10,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:29:10,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:29:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:29:10,640 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) [2022-07-14 06:29:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:10,820 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2022-07-14 06:29:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:29:10,820 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 [2022-07-14 06:29:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:10,821 INFO L225 Difference]: With dead ends: 108 [2022-07-14 06:29:10,821 INFO L226 Difference]: Without dead ends: 108 [2022-07-14 06:29:10,822 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:10,822 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:10,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 87 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:29:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-14 06:29:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 48. [2022-07-14 06:29:10,826 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) [2022-07-14 06:29:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-07-14 06:29:10,827 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 11 [2022-07-14 06:29:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:10,827 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-07-14 06:29:10,827 INFO L496 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) [2022-07-14 06:29:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-07-14 06:29:10,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:29:10,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:10,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:10,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:11,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-14 06:29:11,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-07-14 06:29:11,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:11,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213605112] [2022-07-14 06:29:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:11,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:11,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213605112] [2022-07-14 06:29:11,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213605112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:11,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890775499] [2022-07-14 06:29:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:11,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:11,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:11,094 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) [2022-07-14 06:29:11,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:29:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:11,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:29:11,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:11,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:11,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890775499] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:11,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:11,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-14 06:29:11,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756974034] [2022-07-14 06:29:11,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:11,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:29:11,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:29:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:29:11,242 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) [2022-07-14 06:29:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:11,285 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-07-14 06:29:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:29:11,286 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 [2022-07-14 06:29:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:11,286 INFO L225 Difference]: With dead ends: 48 [2022-07-14 06:29:11,286 INFO L226 Difference]: Without dead ends: 48 [2022-07-14 06:29:11,287 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:11,290 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:11,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 87 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-14 06:29:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-14 06:29:11,299 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) [2022-07-14 06:29:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-07-14 06:29:11,301 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 12 [2022-07-14 06:29:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:11,301 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-07-14 06:29:11,301 INFO L496 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) [2022-07-14 06:29:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-07-14 06:29:11,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:29:11,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:11,303 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-07-14 06:29:11,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:11,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:11,520 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:11,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-07-14 06:29:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:11,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084957003] [2022-07-14 06:29:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:11,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:11,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:11,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084957003] [2022-07-14 06:29:11,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084957003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:11,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205265643] [2022-07-14 06:29:11,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:29:11,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:11,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:11,623 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) [2022-07-14 06:29:11,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:29:11,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:29:11,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:29:11,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:29:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:11,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:12,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205265643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:12,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:12,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-07-14 06:29:12,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154762242] [2022-07-14 06:29:12,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:12,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-14 06:29:12,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:12,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-14 06:29:12,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:29:12,207 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) [2022-07-14 06:29:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:12,378 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2022-07-14 06:29:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:29:12,379 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 [2022-07-14 06:29:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:12,382 INFO L225 Difference]: With dead ends: 96 [2022-07-14 06:29:12,382 INFO L226 Difference]: Without dead ends: 96 [2022-07-14 06:29:12,382 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:12,384 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:12,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 168 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:29:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-14 06:29:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 47. [2022-07-14 06:29:12,392 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) [2022-07-14 06:29:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-07-14 06:29:12,395 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 25 [2022-07-14 06:29:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:12,395 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-07-14 06:29:12,395 INFO L496 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) [2022-07-14 06:29:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-07-14 06:29:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:29:12,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:12,396 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1] [2022-07-14 06:29:12,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:12,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:12,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:12,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1794938034, now seen corresponding path program 2 times [2022-07-14 06:29:12,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:12,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855644063] [2022-07-14 06:29:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:12,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-14 06:29:12,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:12,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855644063] [2022-07-14 06:29:12,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855644063] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:12,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:29:12,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:29:12,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356860088] [2022-07-14 06:29:12,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:12,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:29:12,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:12,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:29:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:29:12,689 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) [2022-07-14 06:29:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:12,732 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-07-14 06:29:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:29:12,732 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 [2022-07-14 06:29:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:12,733 INFO L225 Difference]: With dead ends: 46 [2022-07-14 06:29:12,733 INFO L226 Difference]: Without dead ends: 46 [2022-07-14 06:29:12,734 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:12,734 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:12,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 33 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-14 06:29:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-07-14 06:29:12,737 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) [2022-07-14 06:29:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-07-14 06:29:12,737 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 26 [2022-07-14 06:29:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:12,738 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-07-14 06:29:12,738 INFO L496 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) [2022-07-14 06:29:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-07-14 06:29:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:29:12,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:12,739 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:12,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 06:29:12,739 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 191446135, now seen corresponding path program 2 times [2022-07-14 06:29:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:12,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500071687] [2022-07-14 06:29:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:12,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:12,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:12,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500071687] [2022-07-14 06:29:12,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500071687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:12,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584710341] [2022-07-14 06:29:12,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:29:12,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:12,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:12,808 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) [2022-07-14 06:29:12,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:29:12,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 06:29:12,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:29:12,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:29:12,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:12,871 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:29:12,871 INFO L390 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 [2022-07-14 06:29:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-14 06:29:12,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:29:12,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584710341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:12,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:29:12,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-14 06:29:12,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501490016] [2022-07-14 06:29:12,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:12,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:29:12,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:29:12,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:29:12,923 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) [2022-07-14 06:29:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:12,934 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-07-14 06:29:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:29:12,934 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 [2022-07-14 06:29:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:12,935 INFO L225 Difference]: With dead ends: 42 [2022-07-14 06:29:12,935 INFO L226 Difference]: Without dead ends: 42 [2022-07-14 06:29:12,935 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:12,936 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:12,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-14 06:29:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-14 06:29:12,938 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) [2022-07-14 06:29:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-07-14 06:29:12,939 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 27 [2022-07-14 06:29:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:12,939 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-07-14 06:29:12,939 INFO L496 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) [2022-07-14 06:29:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-07-14 06:29:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:29:12,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:12,940 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:12,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:13,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-14 06:29:13,164 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:13,165 INFO L85 PathProgramCache]: Analyzing trace with hash 191446136, now seen corresponding path program 1 times [2022-07-14 06:29:13,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:13,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477327522] [2022-07-14 06:29:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:13,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:13,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:13,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477327522] [2022-07-14 06:29:13,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477327522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:13,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108485764] [2022-07-14 06:29:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:13,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:13,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:13,248 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) [2022-07-14 06:29:13,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:29:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:13,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:29:13,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:13,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:13,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108485764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:13,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:13,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-07-14 06:29:13,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067738353] [2022-07-14 06:29:13,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:13,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 06:29:13,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:13,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 06:29:13,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:29:13,527 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) [2022-07-14 06:29:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:13,600 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-07-14 06:29:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:29:13,601 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 [2022-07-14 06:29:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:13,602 INFO L225 Difference]: With dead ends: 72 [2022-07-14 06:29:13,602 INFO L226 Difference]: Without dead ends: 72 [2022-07-14 06:29:13,602 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:13,602 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:29:13,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:29:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-14 06:29:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-14 06:29:13,605 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) [2022-07-14 06:29:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-07-14 06:29:13,606 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 27 [2022-07-14 06:29:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:13,606 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-07-14 06:29:13,606 INFO L496 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) [2022-07-14 06:29:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-07-14 06:29:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:29:13,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:13,608 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:13,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:13,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:13,809 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:13,809 INFO L85 PathProgramCache]: Analyzing trace with hash 484543896, now seen corresponding path program 2 times [2022-07-14 06:29:13,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:13,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680051411] [2022-07-14 06:29:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:13,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:13,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:13,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680051411] [2022-07-14 06:29:13,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680051411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:13,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948134305] [2022-07-14 06:29:13,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:29:13,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:13,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:13,964 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) [2022-07-14 06:29:13,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:29:14,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 06:29:14,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:29:14,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:29:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:14,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:29:14,033 INFO L390 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 [2022-07-14 06:29:14,039 INFO L390 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 [2022-07-14 06:29:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-14 06:29:14,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:29:14,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948134305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:14,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:29:14,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 14 [2022-07-14 06:29:14,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200155160] [2022-07-14 06:29:14,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:14,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:29:14,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:14,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:29:14,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:29:14,274 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) [2022-07-14 06:29:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:14,290 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2022-07-14 06:29:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:29:14,290 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 [2022-07-14 06:29:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:14,291 INFO L225 Difference]: With dead ends: 128 [2022-07-14 06:29:14,291 INFO L226 Difference]: Without dead ends: 128 [2022-07-14 06:29:14,292 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:14,292 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:14,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-14 06:29:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-07-14 06:29:14,297 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) [2022-07-14 06:29:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-07-14 06:29:14,297 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 57 [2022-07-14 06:29:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:14,298 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-07-14 06:29:14,298 INFO L496 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) [2022-07-14 06:29:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-07-14 06:29:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-14 06:29:14,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:14,299 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:14,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:14,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:14,530 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1026867069, now seen corresponding path program 1 times [2022-07-14 06:29:14,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:14,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338760280] [2022-07-14 06:29:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:14,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-14 06:29:14,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:14,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338760280] [2022-07-14 06:29:14,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338760280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:14,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50875644] [2022-07-14 06:29:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:14,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:14,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:14,618 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) [2022-07-14 06:29:14,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 06:29:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:14,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:29:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:14,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:15,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50875644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:15,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:15,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 13, 13] total 27 [2022-07-14 06:29:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520277227] [2022-07-14 06:29:15,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:15,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:29:15,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:29:15,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:29:15,219 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) [2022-07-14 06:29:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:16,331 INFO L93 Difference]: Finished difference Result 252 states and 257 transitions. [2022-07-14 06:29:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-14 06:29:16,331 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 [2022-07-14 06:29:16,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:16,333 INFO L225 Difference]: With dead ends: 252 [2022-07-14 06:29:16,333 INFO L226 Difference]: Without dead ends: 252 [2022-07-14 06:29:16,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1681, Invalid=3289, Unknown=0, NotChecked=0, Total=4970 [2022-07-14 06:29:16,335 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 482 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-14 06:29:16,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 52 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:29:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-14 06:29:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2022-07-14 06:29:16,362 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) [2022-07-14 06:29:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2022-07-14 06:29:16,363 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 63 [2022-07-14 06:29:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:16,363 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2022-07-14 06:29:16,364 INFO L496 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) [2022-07-14 06:29:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2022-07-14 06:29:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-14 06:29:16,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:16,365 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:16,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:16,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-14 06:29:16,588 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1510297113, now seen corresponding path program 1 times [2022-07-14 06:29:16,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:16,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226330675] [2022-07-14 06:29:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:16,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:17,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:17,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226330675] [2022-07-14 06:29:17,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226330675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:17,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027059521] [2022-07-14 06:29:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:17,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:17,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:17,008 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) [2022-07-14 06:29:17,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 06:29:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:17,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-14 06:29:17,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:17,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:29:19,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027059521] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:19,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:19,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 71 [2022-07-14 06:29:19,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998250942] [2022-07-14 06:29:19,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:19,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-14 06:29:19,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-14 06:29:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2050, Invalid=2920, Unknown=0, NotChecked=0, Total=4970 [2022-07-14 06:29:19,045 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) [2022-07-14 06:29:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:19,275 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2022-07-14 06:29:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 06:29:19,276 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 [2022-07-14 06:29:19,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:19,277 INFO L225 Difference]: With dead ends: 347 [2022-07-14 06:29:19,277 INFO L226 Difference]: Without dead ends: 347 [2022-07-14 06:29:19,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2050, Invalid=2920, Unknown=0, NotChecked=0, Total=4970 [2022-07-14 06:29:19,280 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:19,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 193 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:29:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-07-14 06:29:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2022-07-14 06:29:19,288 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) [2022-07-14 06:29:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 351 transitions. [2022-07-14 06:29:19,289 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 351 transitions. Word has length 126 [2022-07-14 06:29:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:19,289 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 351 transitions. [2022-07-14 06:29:19,289 INFO L496 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) [2022-07-14 06:29:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 351 transitions. [2022-07-14 06:29:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-14 06:29:19,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:19,296 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:19,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:19,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-14 06:29:19,514 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash -79033337, now seen corresponding path program 2 times [2022-07-14 06:29:19,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:19,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548160851] [2022-07-14 06:29:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:19,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2022-07-14 06:29:19,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:19,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548160851] [2022-07-14 06:29:19,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548160851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083869143] [2022-07-14 06:29:19,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:29:19,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:19,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:19,688 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) [2022-07-14 06:29:19,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 06:29:19,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 06:29:19,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:29:19,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:29:19,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2513 trivial. 0 not checked. [2022-07-14 06:29:20,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:29:20,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083869143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:20,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:29:20,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-14 06:29:20,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022627697] [2022-07-14 06:29:20,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:20,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:29:20,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:29:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:29:20,643 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) [2022-07-14 06:29:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:20,646 INFO L93 Difference]: Finished difference Result 348 states and 351 transitions. [2022-07-14 06:29:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:29:20,647 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 [2022-07-14 06:29:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:20,648 INFO L225 Difference]: With dead ends: 348 [2022-07-14 06:29:20,648 INFO L226 Difference]: Without dead ends: 346 [2022-07-14 06:29:20,648 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:20,649 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:20,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-14 06:29:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-07-14 06:29:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-07-14 06:29:20,655 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) [2022-07-14 06:29:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 349 transitions. [2022-07-14 06:29:20,656 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 349 transitions. Word has length 176 [2022-07-14 06:29:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:20,657 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 349 transitions. [2022-07-14 06:29:20,657 INFO L496 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) [2022-07-14 06:29:20,658 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 349 transitions. [2022-07-14 06:29:20,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-14 06:29:20,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:20,659 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:20,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:20,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-14 06:29:20,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:20,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:20,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1845056352, now seen corresponding path program 1 times [2022-07-14 06:29:20,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:20,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387023706] [2022-07-14 06:29:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:20,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2514 trivial. 0 not checked. [2022-07-14 06:29:21,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:21,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387023706] [2022-07-14 06:29:21,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387023706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:21,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137077042] [2022-07-14 06:29:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:21,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:21,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:21,028 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) [2022-07-14 06:29:21,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 06:29:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:21,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:29:21,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2514 trivial. 0 not checked. [2022-07-14 06:29:21,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2022-07-14 06:29:21,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137077042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:21,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:21,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2022-07-14 06:29:21,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429946881] [2022-07-14 06:29:21,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:21,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:29:21,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:21,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:29:21,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:29:21,629 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) [2022-07-14 06:29:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:21,734 INFO L93 Difference]: Finished difference Result 698 states and 703 transitions. [2022-07-14 06:29:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:29:21,735 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 [2022-07-14 06:29:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:21,737 INFO L225 Difference]: With dead ends: 698 [2022-07-14 06:29:21,737 INFO L226 Difference]: Without dead ends: 698 [2022-07-14 06:29:21,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:29:21,738 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-14 06:29:21,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 120 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:29:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-07-14 06:29:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 694. [2022-07-14 06:29:21,747 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) [2022-07-14 06:29:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 703 transitions. [2022-07-14 06:29:21,749 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 703 transitions. Word has length 177 [2022-07-14 06:29:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:21,749 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 703 transitions. [2022-07-14 06:29:21,750 INFO L496 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) [2022-07-14 06:29:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 703 transitions. [2022-07-14 06:29:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-07-14 06:29:21,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:21,753 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 64, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:21,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:21,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-14 06:29:21,967 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1138865693, now seen corresponding path program 1 times [2022-07-14 06:29:21,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766479461] [2022-07-14 06:29:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:21,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2022-07-14 06:29:22,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:22,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766479461] [2022-07-14 06:29:22,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766479461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:22,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009204862] [2022-07-14 06:29:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:22,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:22,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:22,228 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) [2022-07-14 06:29:22,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 06:29:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-14 06:29:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:22,450 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:29:22,451 INFO L390 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 [2022-07-14 06:29:22,464 INFO L390 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 [2022-07-14 06:29:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2022-07-14 06:29:23,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10213 backedges. 0 proven. 5189 refuted. 0 times theorem prover too weak. 5024 trivial. 0 not checked. [2022-07-14 06:29:24,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009204862] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:24,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:24,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2022-07-14 06:29:24,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062660134] [2022-07-14 06:29:24,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:24,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:29:24,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:24,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:29:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:29:24,831 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) [2022-07-14 06:29:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:24,889 INFO L93 Difference]: Finished difference Result 858 states and 866 transitions. [2022-07-14 06:29:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:29:24,890 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 [2022-07-14 06:29:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:24,893 INFO L225 Difference]: With dead ends: 858 [2022-07-14 06:29:24,893 INFO L226 Difference]: Without dead ends: 858 [2022-07-14 06:29:24,893 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:24,894 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:24,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-07-14 06:29:24,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2022-07-14 06:29:24,904 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) [2022-07-14 06:29:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 866 transitions. [2022-07-14 06:29:24,906 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 866 transitions. Word has length 334 [2022-07-14 06:29:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:24,907 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 866 transitions. [2022-07-14 06:29:24,907 INFO L496 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) [2022-07-14 06:29:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 866 transitions. [2022-07-14 06:29:24,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2022-07-14 06:29:24,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:24,919 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 128, 128, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:24,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:25,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-14 06:29:25,135 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:25,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1652938709, now seen corresponding path program 2 times [2022-07-14 06:29:25,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:25,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294060186] [2022-07-14 06:29:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:25,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 0 proven. 31150 refuted. 0 times theorem prover too weak. 10050 trivial. 0 not checked. [2022-07-14 06:29:25,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:25,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294060186] [2022-07-14 06:29:25,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294060186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:25,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964614226] [2022-07-14 06:29:25,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:29:25,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:25,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:25,585 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) [2022-07-14 06:29:25,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 06:29:25,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:29:25,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:29:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:29:25,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 31140 proven. 12 refuted. 0 times theorem prover too weak. 10048 trivial. 0 not checked. [2022-07-14 06:29:27,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:27,823 INFO L390 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 [2022-07-14 06:29:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41200 backedges. 31140 proven. 12 refuted. 0 times theorem prover too weak. 10048 trivial. 0 not checked. [2022-07-14 06:29:29,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964614226] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:29,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:29,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-07-14 06:29:29,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876128866] [2022-07-14 06:29:29,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:29,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:29:29,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:29,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:29:29,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:29:29,332 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) [2022-07-14 06:29:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:29,584 INFO L93 Difference]: Finished difference Result 1036 states and 1043 transitions. [2022-07-14 06:29:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:29:29,585 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 [2022-07-14 06:29:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:29,589 INFO L225 Difference]: With dead ends: 1036 [2022-07-14 06:29:29,589 INFO L226 Difference]: Without dead ends: 1036 [2022-07-14 06:29:29,589 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:29,589 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:29,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 252 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:29:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-07-14 06:29:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 865. [2022-07-14 06:29:29,601 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) [2022-07-14 06:29:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 871 transitions. [2022-07-14 06:29:29,603 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 871 transitions. Word has length 678 [2022-07-14 06:29:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:29,604 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 871 transitions. [2022-07-14 06:29:29,604 INFO L496 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) [2022-07-14 06:29:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 871 transitions. [2022-07-14 06:29:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2022-07-14 06:29:29,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:29,622 INFO L195 NwaCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-07-14 06:29:29,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:29,835 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1289503496, now seen corresponding path program 2 times [2022-07-14 06:29:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:29,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453480530] [2022-07-14 06:29:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2022-07-14 06:29:30,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:30,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453480530] [2022-07-14 06:29:30,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453480530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595825084] [2022-07-14 06:29:30,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:29:30,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:30,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:30,628 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) [2022-07-14 06:29:30,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 06:29:31,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:29:31,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:29:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 06:29:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:31,131 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:29:31,132 INFO L390 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 [2022-07-14 06:29:31,143 INFO L390 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 [2022-07-14 06:29:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2022-07-14 06:29:34,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:29:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 64462 backedges. 0 proven. 51902 refuted. 0 times theorem prover too weak. 12560 trivial. 0 not checked. [2022-07-14 06:29:36,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595825084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:29:36,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:29:36,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2022-07-14 06:29:36,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248549194] [2022-07-14 06:29:36,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:29:36,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 06:29:36,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 06:29:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:29:36,611 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) [2022-07-14 06:29:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:36,934 INFO L93 Difference]: Finished difference Result 1869 states and 1886 transitions. [2022-07-14 06:29:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:29:36,934 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 [2022-07-14 06:29:36,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:36,940 INFO L225 Difference]: With dead ends: 1869 [2022-07-14 06:29:36,941 INFO L226 Difference]: Without dead ends: 1869 [2022-07-14 06:29:36,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1658 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:29:36,941 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:36,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 361 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:29:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-07-14 06:29:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1864. [2022-07-14 06:29:36,963 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) [2022-07-14 06:29:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 1881 transitions. [2022-07-14 06:29:36,968 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 1881 transitions. Word has length 835 [2022-07-14 06:29:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:36,969 INFO L495 AbstractCegarLoop]: Abstraction has 1864 states and 1881 transitions. [2022-07-14 06:29:36,970 INFO L496 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) [2022-07-14 06:29:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 1881 transitions. [2022-07-14 06:29:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2022-07-14 06:29:36,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:36,976 INFO L195 NwaCegarLoop]: trace histogram [160, 160, 160, 160, 160, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-14 06:29:37,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-14 06:29:37,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:37,191 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash 980978921, now seen corresponding path program 3 times [2022-07-14 06:29:37,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928840657] [2022-07-14 06:29:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:37,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64507 backedges. 0 proven. 51915 refuted. 0 times theorem prover too weak. 12592 trivial. 0 not checked. [2022-07-14 06:29:37,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:37,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928840657] [2022-07-14 06:29:37,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928840657] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:37,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797143006] [2022-07-14 06:29:37,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:29:37,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:37,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:37,738 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) [2022-07-14 06:29:37,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 06:29:37,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-14 06:29:37,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:29:37,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:29:37,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:37,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:29:37,948 INFO L390 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 [2022-07-14 06:29:37,951 INFO L390 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 [2022-07-14 06:29:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64507 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 64493 trivial. 0 not checked. [2022-07-14 06:29:40,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:29:40,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797143006] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:40,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:29:40,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2022-07-14 06:29:40,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959192974] [2022-07-14 06:29:40,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:40,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:29:40,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:40,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:29:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:29:40,110 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) [2022-07-14 06:29:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:40,181 INFO L93 Difference]: Finished difference Result 1862 states and 1879 transitions. [2022-07-14 06:29:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:29:40,182 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 [2022-07-14 06:29:40,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:40,188 INFO L225 Difference]: With dead ends: 1862 [2022-07-14 06:29:40,188 INFO L226 Difference]: Without dead ends: 1862 [2022-07-14 06:29:40,189 INFO L412 NwaCegarLoop]: 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 [2022-07-14 06:29:40,189 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:40,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 33 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:29:40,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2022-07-14 06:29:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 863. [2022-07-14 06:29:40,208 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) [2022-07-14 06:29:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 869 transitions. [2022-07-14 06:29:40,210 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 869 transitions. Word has length 857 [2022-07-14 06:29:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:40,211 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 869 transitions. [2022-07-14 06:29:40,211 INFO L496 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) [2022-07-14 06:29:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 869 transitions. [2022-07-14 06:29:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2022-07-14 06:29:40,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:29:40,218 INFO L195 NwaCegarLoop]: 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] [2022-07-14 06:29:40,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:40,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:40,439 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-14 06:29:40,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:29:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash 77125929, now seen corresponding path program 1 times [2022-07-14 06:29:40,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:29:40,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475839637] [2022-07-14 06:29:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:40,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:29:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 0 proven. 51915 refuted. 0 times theorem prover too weak. 12605 trivial. 0 not checked. [2022-07-14 06:29:40,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:29:40,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475839637] [2022-07-14 06:29:40,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475839637] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:29:40,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339784904] [2022-07-14 06:29:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:29:40,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:29:40,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:29:40,896 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) [2022-07-14 06:29:40,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 06:29:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:29:41,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 06:29:41,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:29:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64520 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64520 trivial. 0 not checked. [2022-07-14 06:29:45,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:29:45,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339784904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:29:45,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:29:45,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-07-14 06:29:45,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345658410] [2022-07-14 06:29:45,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:29:45,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:29:45,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:29:45,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:29:45,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:29:45,559 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) [2022-07-14 06:29:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:29:45,561 INFO L93 Difference]: Finished difference Result 862 states and 868 transitions. [2022-07-14 06:29:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:29:45,562 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 [2022-07-14 06:29:45,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:29:45,563 INFO L225 Difference]: With dead ends: 862 [2022-07-14 06:29:45,563 INFO L226 Difference]: Without dead ends: 0 [2022-07-14 06:29:45,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:29:45,564 INFO L413 NwaCegarLoop]: 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 [2022-07-14 06:29:45,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-07-14 06:29:45,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-14 06:29:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-14 06:29:45,565 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) [2022-07-14 06:29:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-14 06:29:45,565 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 862 [2022-07-14 06:29:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:29:45,565 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 06:29:45,565 INFO L496 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) [2022-07-14 06:29:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-14 06:29:45,566 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-14 06:29:45,568 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2022-07-14 06:29:45,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2022-07-14 06:29:45,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-07-14 06:29:45,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-07-14 06:29:45,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-07-14 06:29:45,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2022-07-14 06:29:45,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2022-07-14 06:29:45,570 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-07-14 06:29:45,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:29:45,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-14 06:29:45,786 INFO L356 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:29:45,790 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-14 06:29:45,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.07 06:29:45 BoogieIcfgContainer [2022-07-14 06:29:45,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-14 06:29:45,794 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 06:29:45,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 06:29:45,795 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 06:29:45,795 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:29:08" (3/4) ... [2022-07-14 06:29:45,798 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-14 06:29:45,816 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-07-14 06:29:45,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-14 06:29:45,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-14 06:29:45,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-14 06:29:45,848 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-14 06:29:45,848 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 06:29:45,849 INFO L158 Benchmark]: Toolchain (without parser) took 37562.26ms. Allocated memory was 96.5MB in the beginning and 587.2MB in the end (delta: 490.7MB). Free memory was 68.1MB in the beginning and 310.2MB in the end (delta: -242.0MB). Peak memory consumption was 248.2MB. Max. memory is 16.1GB. [2022-07-14 06:29:45,849 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 96.5MB. Free memory is still 52.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:29:45,857 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.05ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 67.9MB in the beginning and 96.8MB in the end (delta: -28.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:29:45,857 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.91ms. Allocated memory is still 119.5MB. Free memory was 96.8MB in the beginning and 95.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:29:45,858 INFO L158 Benchmark]: Boogie Preprocessor took 26.19ms. Allocated memory is still 119.5MB. Free memory was 95.2MB in the beginning and 94.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:29:45,858 INFO L158 Benchmark]: RCFGBuilder took 272.90ms. Allocated memory is still 119.5MB. Free memory was 94.0MB in the beginning and 83.1MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-14 06:29:45,859 INFO L158 Benchmark]: TraceAbstraction took 36970.48ms. Allocated memory was 119.5MB in the beginning and 587.2MB in the end (delta: 467.7MB). Free memory was 82.6MB in the beginning and 312.6MB in the end (delta: -230.0MB). Peak memory consumption was 238.9MB. Max. memory is 16.1GB. [2022-07-14 06:29:45,859 INFO L158 Benchmark]: Witness Printer took 54.04ms. Allocated memory is still 587.2MB. Free memory was 312.6MB in the beginning and 310.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:29:45,861 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 96.5MB. Free memory is still 52.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.05ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 67.9MB in the beginning and 96.8MB in the end (delta: -28.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.91ms. Allocated memory is still 119.5MB. Free memory was 96.8MB in the beginning and 95.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.19ms. Allocated memory is still 119.5MB. Free memory was 95.2MB in the beginning and 94.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 272.90ms. Allocated memory is still 119.5MB. Free memory was 94.0MB in the beginning and 83.1MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 36970.48ms. Allocated memory was 119.5MB in the beginning and 587.2MB in the end (delta: 467.7MB). Free memory was 82.6MB in the beginning and 312.6MB in the end (delta: -230.0MB). Peak memory consumption was 238.9MB. Max. memory is 16.1GB. * Witness Printer took 54.04ms. Allocated memory is still 587.2MB. Free memory was 312.6MB in the beginning and 310.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: 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: 36.9s, OverallIterations: 22, TraceHistogramMax: 160, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2097 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2097 mSDsluCounter, 1966 SdHoareTripleChecker+Invalid, 1.1s 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, 6437 SyntacticMatches, 3 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 4.6s 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: 0.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 1432 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 25.9s InterpolantComputationTime, 8610 NumberOfCodeBlocks, 7533 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 10859 ConstructedInterpolants, 1034 QuantifiedInterpolants, 126032 SizeOfPredicates, 43 NumberOfNonLiveVariables, 9845 ConjunctsInSsa, 223 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! [2022-07-14 06:29:45,883 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