./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/ArraysWithLenghtAtDeclaration.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 ef4a52e45666a829b602608a46cff9c8137910dd58bdfaebe016ce17984d1ac8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:20:01,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:20:01,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:20:01,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:20:01,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:20:01,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:20:01,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:20:01,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:20:01,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:20:01,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:20:01,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:20:01,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:20:01,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:20:01,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:20:01,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:20:01,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:20:01,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:20:01,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:20:01,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:20:01,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:20:01,506 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:20:01,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:20:01,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:20:01,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:20:01,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:20:01,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:20:01,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:20:01,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:20:01,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:20:01,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:20:01,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:20:01,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:20:01,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:20:01,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:20:01,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:20:01,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:20:01,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:20:01,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:20:01,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:20:01,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:20:01,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:20:01,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:20:01,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:20:01,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:20:01,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:20:01,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:20:01,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:20:01,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:20:01,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:20:01,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:20:01,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:20:01,566 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:20:01,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:20:01,567 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:20:01,568 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:20:01,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:20:01,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:20:01,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:20:01,577 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:20:01,577 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:20:01,577 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:20:01,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:20:01,578 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:20:01,578 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:20:01,578 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:20:01,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:20:01,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:20:01,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:20:01,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:20:01,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:20:01,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:20:01,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:20:01,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:20:01,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef4a52e45666a829b602608a46cff9c8137910dd58bdfaebe016ce17984d1ac8 [2022-07-21 17:20:01,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:20:01,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:20:01,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:20:01,904 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:20:01,905 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:20:01,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2022-07-21 17:20:01,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0baf84316/e07bf4c015b244e3be9fe4a39a14d4bb/FLAG00317553c [2022-07-21 17:20:02,396 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:20:02,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2022-07-21 17:20:02,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0baf84316/e07bf4c015b244e3be9fe4a39a14d4bb/FLAG00317553c [2022-07-21 17:20:02,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0baf84316/e07bf4c015b244e3be9fe4a39a14d4bb [2022-07-21 17:20:02,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:20:02,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:20:02,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:20:02,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:20:02,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:20:02,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:02,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1267d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02, skipping insertion in model container [2022-07-21 17:20:02,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:02,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:20:02,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:20:02,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:20:02,949 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:20:02,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:20:02,978 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:20:02,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02 WrapperNode [2022-07-21 17:20:02,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:20:02,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:20:02,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:20:02,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:20:02,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:03,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:03,032 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-07-21 17:20:03,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:20:03,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:20:03,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:20:03,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:20:03,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:03,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:03,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:03,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:03,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:03,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:03,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:03,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:20:03,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:20:03,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:20:03,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:20:03,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (1/1) ... [2022-07-21 17:20:03,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:20:03,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:03,080 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) [2022-07-21 17:20:03,082 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 [2022-07-21 17:20:03,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:20:03,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:20:03,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:20:03,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:20:03,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:20:03,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:20:03,160 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:20:03,161 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:20:03,368 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:20:03,373 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:20:03,373 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 17:20:03,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:20:03 BoogieIcfgContainer [2022-07-21 17:20:03,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:20:03,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:20:03,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:20:03,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:20:03,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:20:02" (1/3) ... [2022-07-21 17:20:03,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b79bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:20:03, skipping insertion in model container [2022-07-21 17:20:03,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:02" (2/3) ... [2022-07-21 17:20:03,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b79bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:20:03, skipping insertion in model container [2022-07-21 17:20:03,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:20:03" (3/3) ... [2022-07-21 17:20:03,386 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2022-07-21 17:20:03,413 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:20:03,413 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-07-21 17:20:03,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:20:03,493 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@65084516, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a797e81 [2022-07-21 17:20:03,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-21 17:20:03,502 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) [2022-07-21 17:20:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-21 17:20:03,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:03,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-21 17:20:03,508 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)] === [2022-07-21 17:20:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:03,512 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-07-21 17:20:03,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:03,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165267680] [2022-07-21 17:20:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:03,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:03,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:03,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165267680] [2022-07-21 17:20:03,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165267680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:03,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:03,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:20:03,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856575500] [2022-07-21 17:20:03,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:03,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:20:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:03,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:20:03,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:20:03,743 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) [2022-07-21 17:20:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:03,805 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-07-21 17:20:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:20:03,808 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 [2022-07-21 17:20:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:03,814 INFO L225 Difference]: With dead ends: 59 [2022-07-21 17:20:03,814 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 17:20:03,817 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 [2022-07-21 17:20:03,821 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 [2022-07-21 17:20:03,822 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] [2022-07-21 17:20:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 17:20:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-07-21 17:20:03,853 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) [2022-07-21 17:20:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-07-21 17:20:03,855 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-07-21 17:20:03,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:03,855 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-07-21 17:20:03,856 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) [2022-07-21 17:20:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-07-21 17:20:03,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:20:03,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:03,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:20:03,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:20:03,857 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)] === [2022-07-21 17:20:03,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:03,858 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-07-21 17:20:03,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:03,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828469213] [2022-07-21 17:20:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:03,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:03,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828469213] [2022-07-21 17:20:03,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828469213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:03,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:03,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:20:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304412592] [2022-07-21 17:20:03,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:03,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:20:03,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:03,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:20:03,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:20:03,899 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) [2022-07-21 17:20:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:03,945 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-07-21 17:20:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:20:03,946 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 [2022-07-21 17:20:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:03,947 INFO L225 Difference]: With dead ends: 58 [2022-07-21 17:20:03,947 INFO L226 Difference]: Without dead ends: 58 [2022-07-21 17:20:03,952 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 [2022-07-21 17:20:03,953 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:03,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-21 17:20:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-07-21 17:20:03,961 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) [2022-07-21 17:20:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-21 17:20:03,962 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-21 17:20:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:03,962 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-21 17:20:03,962 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) [2022-07-21 17:20:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-21 17:20:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:20:03,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:03,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:20:03,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:20:03,963 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)] === [2022-07-21 17:20:03,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:03,963 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-07-21 17:20:03,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:03,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078108890] [2022-07-21 17:20:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:03,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:04,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:04,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078108890] [2022-07-21 17:20:04,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078108890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:04,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:04,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:20:04,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315735614] [2022-07-21 17:20:04,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:04,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:04,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:20:04,030 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) [2022-07-21 17:20:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:04,075 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-07-21 17:20:04,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:20:04,076 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 [2022-07-21 17:20:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:04,077 INFO L225 Difference]: With dead ends: 32 [2022-07-21 17:20:04,077 INFO L226 Difference]: Without dead ends: 32 [2022-07-21 17:20:04,078 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 [2022-07-21 17:20:04,079 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 [2022-07-21 17:20:04,082 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] [2022-07-21 17:20:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-21 17:20:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-21 17:20:04,087 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) [2022-07-21 17:20:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-21 17:20:04,089 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-07-21 17:20:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:04,090 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-21 17:20:04,090 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) [2022-07-21 17:20:04,090 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-21 17:20:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:20:04,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:04,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:20:04,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:20:04,092 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)] === [2022-07-21 17:20:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-07-21 17:20:04,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:04,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244105966] [2022-07-21 17:20:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:04,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:04,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244105966] [2022-07-21 17:20:04,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244105966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:04,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:04,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:20:04,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223692299] [2022-07-21 17:20:04,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:04,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:04,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:04,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:04,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:20:04,191 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) [2022-07-21 17:20:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:04,247 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-07-21 17:20:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:20:04,247 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 [2022-07-21 17:20:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:04,248 INFO L225 Difference]: With dead ends: 55 [2022-07-21 17:20:04,248 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 17:20:04,249 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 [2022-07-21 17:20:04,250 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:04,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 17:20:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-07-21 17:20:04,257 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) [2022-07-21 17:20:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-21 17:20:04,258 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-21 17:20:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:04,259 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-21 17:20:04,259 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) [2022-07-21 17:20:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-21 17:20:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:20:04,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:04,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:04,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:20:04,261 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)] === [2022-07-21 17:20:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:04,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-07-21 17:20:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:04,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238369167] [2022-07-21 17:20:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:04,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:04,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:04,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238369167] [2022-07-21 17:20:04,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238369167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:04,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:04,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:20:04,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217389153] [2022-07-21 17:20:04,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:04,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:04,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:04,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:20:04,326 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:20:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:04,374 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-21 17:20:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:20:04,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:20:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:04,376 INFO L225 Difference]: With dead ends: 60 [2022-07-21 17:20:04,376 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 17:20:04,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:20:04,378 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:04,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 17:20:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-07-21 17:20:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 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) [2022-07-21 17:20:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-07-21 17:20:04,386 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2022-07-21 17:20:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:04,387 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-07-21 17:20:04,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:20:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-07-21 17:20:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 17:20:04,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:04,391 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:04,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 17:20:04,392 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)] === [2022-07-21 17:20:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:04,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-07-21 17:20:04,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:04,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919271649] [2022-07-21 17:20:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:04,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:04,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:04,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919271649] [2022-07-21 17:20:04,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919271649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:04,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733851267] [2022-07-21 17:20:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:04,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:04,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:04,459 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) [2022-07-21 17:20:04,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:20:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:04,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:20:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:04,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:20:04,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733851267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:04,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:20:04,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-07-21 17:20:04,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672570464] [2022-07-21 17:20:04,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:04,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:20:04,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:04,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:20:04,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:20:04,573 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) 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) [2022-07-21 17:20:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:04,641 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-07-21 17:20:04,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:20:04,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 10 [2022-07-21 17:20:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:04,642 INFO L225 Difference]: With dead ends: 75 [2022-07-21 17:20:04,642 INFO L226 Difference]: Without dead ends: 75 [2022-07-21 17:20:04,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:20:04,644 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:04,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 62 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-21 17:20:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 39. [2022-07-21 17:20:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.34375) internal successors, (43), 38 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) [2022-07-21 17:20:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-07-21 17:20:04,648 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 10 [2022-07-21 17:20:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:04,648 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-07-21 17:20:04,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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) [2022-07-21 17:20:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-07-21 17:20:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:20:04,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:04,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:04,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:04,863 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 [2022-07-21 17:20:04,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-07-21 17:20:04,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:04,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875560399] [2022-07-21 17:20:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:04,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:04,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:04,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875560399] [2022-07-21 17:20:04,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875560399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:04,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:04,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:20:04,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791673386] [2022-07-21 17:20:04,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:04,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:20:04,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:04,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:20:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:20:04,952 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:20:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:04,967 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-07-21 17:20:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:20:04,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 17:20:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:04,968 INFO L225 Difference]: With dead ends: 37 [2022-07-21 17:20:04,968 INFO L226 Difference]: Without dead ends: 37 [2022-07-21 17:20:04,968 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 [2022-07-21 17:20:04,969 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:04,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-21 17:20:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-21 17:20:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:20:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-07-21 17:20:04,972 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 12 [2022-07-21 17:20:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:04,973 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-07-21 17:20:04,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:20:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-07-21 17:20:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:20:04,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:04,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:04,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 17:20:04,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088609, now seen corresponding path program 1 times [2022-07-21 17:20:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:04,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238130467] [2022-07-21 17:20:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:20:05,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:05,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238130467] [2022-07-21 17:20:05,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238130467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:05,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:05,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:20:05,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39255800] [2022-07-21 17:20:05,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:05,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:05,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:05,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:05,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:20:05,052 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2022-07-21 17:20:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:05,082 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-21 17:20:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:20:05,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 12 [2022-07-21 17:20:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:05,084 INFO L225 Difference]: With dead ends: 42 [2022-07-21 17:20:05,084 INFO L226 Difference]: Without dead ends: 42 [2022-07-21 17:20:05,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:20:05,085 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:05,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-21 17:20:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-07-21 17:20:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 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) [2022-07-21 17:20:05,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-07-21 17:20:05,088 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2022-07-21 17:20:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:05,088 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-07-21 17:20:05,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2022-07-21 17:20:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-07-21 17:20:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:20:05,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:05,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:05,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 17:20:05,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:05,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1343012932, now seen corresponding path program 1 times [2022-07-21 17:20:05,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:05,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549135762] [2022-07-21 17:20:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:05,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:20:05,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:05,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549135762] [2022-07-21 17:20:05,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549135762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:05,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110288608] [2022-07-21 17:20:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:05,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:05,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:05,152 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) [2022-07-21 17:20:05,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:20:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:05,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:20:05,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:20:05,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:05,381 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 28 treesize of output 24 [2022-07-21 17:20:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:20:05,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110288608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:05,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:05,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-21 17:20:05,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012651448] [2022-07-21 17:20:05,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:05,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:20:05,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:05,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:20:05,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:20:05,436 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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) [2022-07-21 17:20:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:05,516 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-07-21 17:20:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:20:05,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 17:20:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:05,518 INFO L225 Difference]: With dead ends: 46 [2022-07-21 17:20:05,518 INFO L226 Difference]: Without dead ends: 46 [2022-07-21 17:20:05,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:20:05,520 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:05,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 42 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-21 17:20:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-07-21 17:20:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.25) internal successors, (45), 40 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) [2022-07-21 17:20:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-07-21 17:20:05,526 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 18 [2022-07-21 17:20:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:05,527 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-07-21 17:20:05,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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) [2022-07-21 17:20:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-07-21 17:20:05,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 17:20:05,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:05,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:05,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:05,743 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,SelfDestructingSolverStorable8 [2022-07-21 17:20:05,744 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1315219428, now seen corresponding path program 1 times [2022-07-21 17:20:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844422300] [2022-07-21 17:20:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:20:05,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:05,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844422300] [2022-07-21 17:20:05,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844422300] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:05,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059207707] [2022-07-21 17:20:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:05,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:05,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:05,800 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) [2022-07-21 17:20:05,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:20:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:05,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:20:05,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:20:05,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:20:05,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059207707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:05,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:05,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-21 17:20:05,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847605464] [2022-07-21 17:20:05,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:05,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:20:05,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:05,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:20:05,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:20:05,945 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:20:06,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:06,049 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2022-07-21 17:20:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:20:06,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-21 17:20:06,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:06,050 INFO L225 Difference]: With dead ends: 51 [2022-07-21 17:20:06,050 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 17:20:06,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:20:06,051 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:06,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 53 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:06,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 17:20:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2022-07-21 17:20:06,059 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) [2022-07-21 17:20:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-07-21 17:20:06,059 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 19 [2022-07-21 17:20:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:06,059 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-07-21 17:20:06,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:20:06,060 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-07-21 17:20:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 17:20:06,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:06,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:06,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:06,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:06,283 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2077891072, now seen corresponding path program 1 times [2022-07-21 17:20:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:06,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341765636] [2022-07-21 17:20:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:20:06,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:06,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341765636] [2022-07-21 17:20:06,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341765636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:06,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115968756] [2022-07-21 17:20:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:06,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:06,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:06,346 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) [2022-07-21 17:20:06,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:20:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:06,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:20:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:20:06,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:20:06,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115968756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:06,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:20:06,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-21 17:20:06,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843784668] [2022-07-21 17:20:06,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:06,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:06,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:06,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:06,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:20:06,577 INFO L87 Difference]: Start difference. First operand 44 states and 47 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) [2022-07-21 17:20:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:06,577 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2022-07-21 17:20:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:20:06,578 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 21 [2022-07-21 17:20:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:06,578 INFO L225 Difference]: With dead ends: 45 [2022-07-21 17:20:06,578 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 17:20:06,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:20:06,579 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 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 [2022-07-21 17:20:06,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-21 17:20:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 17:20:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-21 17:20:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 42 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) [2022-07-21 17:20:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-07-21 17:20:06,581 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 21 [2022-07-21 17:20:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:06,582 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-07-21 17:20:06,582 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) [2022-07-21 17:20:06,582 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-07-21 17:20:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:20:06,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:06,582 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:06,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:06,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:06,796 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:06,797 INFO L85 PathProgramCache]: Analyzing trace with hash -9763705, now seen corresponding path program 1 times [2022-07-21 17:20:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:06,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740400853] [2022-07-21 17:20:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:06,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:20:06,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740400853] [2022-07-21 17:20:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740400853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068098917] [2022-07-21 17:20:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:06,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:06,845 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) [2022-07-21 17:20:06,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:20:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:06,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:20:06,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:06,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:20:07,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:20:07,052 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:20:07,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-21 17:20:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:07,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:07,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-21 17:20:07,105 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 28 treesize of output 26 [2022-07-21 17:20:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:07,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068098917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:07,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:07,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 10] total 19 [2022-07-21 17:20:07,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71053114] [2022-07-21 17:20:07,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:07,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:20:07,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:20:07,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:20:07,195 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 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) [2022-07-21 17:20:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:07,402 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-07-21 17:20:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:20:07,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 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 22 [2022-07-21 17:20:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:07,403 INFO L225 Difference]: With dead ends: 72 [2022-07-21 17:20:07,403 INFO L226 Difference]: Without dead ends: 72 [2022-07-21 17:20:07,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2022-07-21 17:20:07,404 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:07,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 137 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-21 17:20:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2022-07-21 17:20:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 48 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) [2022-07-21 17:20:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-07-21 17:20:07,406 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 22 [2022-07-21 17:20:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:07,407 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-07-21 17:20:07,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 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) [2022-07-21 17:20:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-07-21 17:20:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:20:07,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:07,407 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:07,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:07,610 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,SelfDestructingSolverStorable11 [2022-07-21 17:20:07,611 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1532050453, now seen corresponding path program 1 times [2022-07-21 17:20:07,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:07,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325386752] [2022-07-21 17:20:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:07,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:20:07,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:07,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325386752] [2022-07-21 17:20:07,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325386752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:07,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956793812] [2022-07-21 17:20:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:07,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:07,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:07,662 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) [2022-07-21 17:20:07,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:20:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:07,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:20:07,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:20:07,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:20:07,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956793812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:07,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:07,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-07-21 17:20:07,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806866566] [2022-07-21 17:20:07,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:07,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:20:07,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:07,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:20:07,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:20:07,762 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:20:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:07,804 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-07-21 17:20:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:20:07,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 17:20:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:07,806 INFO L225 Difference]: With dead ends: 104 [2022-07-21 17:20:07,806 INFO L226 Difference]: Without dead ends: 104 [2022-07-21 17:20:07,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:20:07,807 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 90 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 84 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 [2022-07-21 17:20:07,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 84 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-21 17:20:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 60. [2022-07-21 17:20:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2) internal successors, (66), 59 states have internal predecessors, (66), 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) [2022-07-21 17:20:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-07-21 17:20:07,811 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 22 [2022-07-21 17:20:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:07,811 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-07-21 17:20:07,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:20:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-07-21 17:20:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:20:07,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:07,812 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:07,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:08,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:08,020 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:08,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash -248923733, now seen corresponding path program 1 times [2022-07-21 17:20:08,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:08,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809371586] [2022-07-21 17:20:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:08,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:20:08,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:08,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809371586] [2022-07-21 17:20:08,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809371586] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:08,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697477394] [2022-07-21 17:20:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:08,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:08,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:08,120 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) [2022-07-21 17:20:08,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:20:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:08,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 17:20:08,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:08,193 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:20:08,193 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 [2022-07-21 17:20:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:20:08,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:20:08,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697477394] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:08,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:08,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-07-21 17:20:08,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899693043] [2022-07-21 17:20:08,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:08,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:20:08,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:08,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:20:08,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:20:08,404 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 12 states have internal predecessors, (67), 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) [2022-07-21 17:20:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:08,564 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2022-07-21 17:20:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:20:08,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 12 states have internal predecessors, (67), 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 23 [2022-07-21 17:20:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:08,565 INFO L225 Difference]: With dead ends: 103 [2022-07-21 17:20:08,565 INFO L226 Difference]: Without dead ends: 103 [2022-07-21 17:20:08,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:20:08,566 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 142 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:08,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 71 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-21 17:20:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2022-07-21 17:20:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 60 states have internal predecessors, (65), 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) [2022-07-21 17:20:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-07-21 17:20:08,569 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 23 [2022-07-21 17:20:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:08,569 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-07-21 17:20:08,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 12 states have internal predecessors, (67), 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) [2022-07-21 17:20:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-07-21 17:20:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:20:08,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:08,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:08,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:08,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:08,779 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:08,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:08,779 INFO L85 PathProgramCache]: Analyzing trace with hash 631407484, now seen corresponding path program 2 times [2022-07-21 17:20:08,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:08,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475674240] [2022-07-21 17:20:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:08,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:08,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:08,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475674240] [2022-07-21 17:20:08,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475674240] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:08,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835615345] [2022-07-21 17:20:08,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:08,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:08,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:08,856 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) [2022-07-21 17:20:08,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 17:20:08,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:20:08,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:08,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:20:08,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:08,923 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:20:08,924 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 [2022-07-21 17:20:08,937 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 [2022-07-21 17:20:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:09,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:09,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835615345] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:09,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:09,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-07-21 17:20:09,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969078262] [2022-07-21 17:20:09,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:09,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:20:09,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:09,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:20:09,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:20:09,186 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 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) [2022-07-21 17:20:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:09,269 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2022-07-21 17:20:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:20:09,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 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 29 [2022-07-21 17:20:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:09,271 INFO L225 Difference]: With dead ends: 153 [2022-07-21 17:20:09,271 INFO L226 Difference]: Without dead ends: 153 [2022-07-21 17:20:09,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:20:09,272 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:09,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 68 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-21 17:20:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2022-07-21 17:20:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 144 states have internal predecessors, (166), 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) [2022-07-21 17:20:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2022-07-21 17:20:09,276 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 29 [2022-07-21 17:20:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:09,277 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2022-07-21 17:20:09,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 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) [2022-07-21 17:20:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2022-07-21 17:20:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 17:20:09,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:09,278 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:09,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:09,491 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,SelfDestructingSolverStorable14 [2022-07-21 17:20:09,491 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash 39048524, now seen corresponding path program 2 times [2022-07-21 17:20:09,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:09,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574300913] [2022-07-21 17:20:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:09,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:20:09,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:09,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574300913] [2022-07-21 17:20:09,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574300913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:09,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622286977] [2022-07-21 17:20:09,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:09,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:09,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:09,556 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) [2022-07-21 17:20:09,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 17:20:09,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:20:09,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:09,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:20:09,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:09,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:09,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622286977] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:09,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:09,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-07-21 17:20:09,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251924852] [2022-07-21 17:20:09,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:09,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:20:09,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:09,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:20:09,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:20:09,724 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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) [2022-07-21 17:20:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:09,888 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2022-07-21 17:20:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:20:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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 37 [2022-07-21 17:20:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:09,890 INFO L225 Difference]: With dead ends: 155 [2022-07-21 17:20:09,890 INFO L226 Difference]: Without dead ends: 155 [2022-07-21 17:20:09,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:20:09,891 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 215 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:09,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 64 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-21 17:20:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 133. [2022-07-21 17:20:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1640625) internal successors, (149), 132 states have internal predecessors, (149), 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) [2022-07-21 17:20:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2022-07-21 17:20:09,894 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 37 [2022-07-21 17:20:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:09,894 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2022-07-21 17:20:09,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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) [2022-07-21 17:20:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2022-07-21 17:20:09,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 17:20:09,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:09,895 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:09,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:10,095 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,SelfDestructingSolverStorable15 [2022-07-21 17:20:10,096 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)] === [2022-07-21 17:20:10,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:10,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1591695324, now seen corresponding path program 2 times [2022-07-21 17:20:10,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:10,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59166482] [2022-07-21 17:20:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:10,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:20:10,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:10,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59166482] [2022-07-21 17:20:10,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59166482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:10,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431305415] [2022-07-21 17:20:10,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:10,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:10,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:10,162 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) [2022-07-21 17:20:10,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 17:20:10,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:20:10,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:20:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:10,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:10,446 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 [2022-07-21 17:20:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:10,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431305415] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:10,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:10,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2022-07-21 17:20:10,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228718981] [2022-07-21 17:20:10,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:10,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:20:10,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:20:10,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:20:10,565 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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) [2022-07-21 17:20:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:10,719 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2022-07-21 17:20:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:20:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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 39 [2022-07-21 17:20:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:10,720 INFO L225 Difference]: With dead ends: 143 [2022-07-21 17:20:10,720 INFO L226 Difference]: Without dead ends: 143 [2022-07-21 17:20:10,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:20:10,721 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 199 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:10,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 111 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:10,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-21 17:20:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2022-07-21 17:20:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 136 states have internal predecessors, (152), 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) [2022-07-21 17:20:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2022-07-21 17:20:10,724 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 39 [2022-07-21 17:20:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:10,724 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2022-07-21 17:20:10,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 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) [2022-07-21 17:20:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2022-07-21 17:20:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:20:10,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:10,725 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-07-21 17:20:10,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-21 17:20:10,939 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,SelfDestructingSolverStorable16 [2022-07-21 17:20:10,939 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:10,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1454957583, now seen corresponding path program 3 times [2022-07-21 17:20:10,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:10,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166333963] [2022-07-21 17:20:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:10,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:20:11,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:11,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166333963] [2022-07-21 17:20:11,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166333963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:11,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721734363] [2022-07-21 17:20:11,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:20:11,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:11,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:11,014 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) [2022-07-21 17:20:11,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 17:20:11,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 17:20:11,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:11,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:20:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:11,083 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 [2022-07-21 17:20:11,094 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 [2022-07-21 17:20:11,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:20:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 13 proven. 84 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-21 17:20:11,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-21 17:20:12,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721734363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:12,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:12,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2022-07-21 17:20:12,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931207226] [2022-07-21 17:20:12,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:12,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 17:20:12,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 17:20:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:20:12,126 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 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) [2022-07-21 17:20:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:12,924 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2022-07-21 17:20:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 17:20:12,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 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 54 [2022-07-21 17:20:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:12,924 INFO L225 Difference]: With dead ends: 163 [2022-07-21 17:20:12,924 INFO L226 Difference]: Without dead ends: 163 [2022-07-21 17:20:12,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=670, Invalid=1780, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 17:20:12,926 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 568 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:12,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 39 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 197 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2022-07-21 17:20:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-21 17:20:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 129. [2022-07-21 17:20:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.112) internal successors, (139), 128 states have internal predecessors, (139), 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) [2022-07-21 17:20:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2022-07-21 17:20:12,928 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 54 [2022-07-21 17:20:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:12,928 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2022-07-21 17:20:12,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 23 states have internal predecessors, (99), 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) [2022-07-21 17:20:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2022-07-21 17:20:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 17:20:12,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:12,929 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-21 17:20:12,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:13,139 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,SelfDestructingSolverStorable17 [2022-07-21 17:20:13,139 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)] === [2022-07-21 17:20:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash -372658966, now seen corresponding path program 3 times [2022-07-21 17:20:13,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:13,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577855530] [2022-07-21 17:20:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 17:20:13,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577855530] [2022-07-21 17:20:13,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577855530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:13,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324952901] [2022-07-21 17:20:13,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:20:13,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:13,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:13,251 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) [2022-07-21 17:20:13,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 17:20:13,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 17:20:13,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:13,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:20:13,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:20:13,330 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 [2022-07-21 17:20:13,332 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 [2022-07-21 17:20:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 17:20:13,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:20:13,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324952901] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:13,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:20:13,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2022-07-21 17:20:13,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225473020] [2022-07-21 17:20:13,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:13,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:20:13,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:13,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:20:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:20:13,523 INFO L87 Difference]: Start difference. First operand 129 states and 139 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) [2022-07-21 17:20:13,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:13,557 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-07-21 17:20:13,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:20:13,559 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 60 [2022-07-21 17:20:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:13,559 INFO L225 Difference]: With dead ends: 127 [2022-07-21 17:20:13,559 INFO L226 Difference]: Without dead ends: 127 [2022-07-21 17:20:13,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:20:13,560 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:13,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-21 17:20:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 95. [2022-07-21 17:20:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.075268817204301) internal successors, (100), 94 states have internal predecessors, (100), 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) [2022-07-21 17:20:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2022-07-21 17:20:13,563 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 60 [2022-07-21 17:20:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:13,563 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2022-07-21 17:20:13,563 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) [2022-07-21 17:20:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2022-07-21 17:20:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 17:20:13,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:13,564 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:13,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-21 17:20:13,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:13,771 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash -592408120, now seen corresponding path program 1 times [2022-07-21 17:20:13,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:13,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964883683] [2022-07-21 17:20:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:13,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 25 proven. 56 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 17:20:13,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:13,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964883683] [2022-07-21 17:20:13,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964883683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:13,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965524520] [2022-07-21 17:20:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:13,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:13,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:13,869 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) [2022-07-21 17:20:13,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 17:20:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:13,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:20:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 17:20:14,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 17:20:14,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965524520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:14,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:14,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-07-21 17:20:14,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550902760] [2022-07-21 17:20:14,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:14,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:20:14,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:14,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:20:14,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:20:14,132 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 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) [2022-07-21 17:20:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:14,348 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-07-21 17:20:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:20:14,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 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 65 [2022-07-21 17:20:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:14,349 INFO L225 Difference]: With dead ends: 95 [2022-07-21 17:20:14,349 INFO L226 Difference]: Without dead ends: 95 [2022-07-21 17:20:14,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:20:14,350 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:14,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 94 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:20:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-21 17:20:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-21 17:20:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.053763440860215) internal successors, (98), 94 states have internal predecessors, (98), 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) [2022-07-21 17:20:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-07-21 17:20:14,352 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 65 [2022-07-21 17:20:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:14,352 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-07-21 17:20:14,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 states have internal predecessors, (89), 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) [2022-07-21 17:20:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-07-21 17:20:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 17:20:14,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:14,353 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:14,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:14,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-07-21 17:20:14,571 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash -600086545, now seen corresponding path program 2 times [2022-07-21 17:20:14,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:14,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649333930] [2022-07-21 17:20:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:14,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 17:20:14,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:14,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649333930] [2022-07-21 17:20:14,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649333930] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:14,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564115489] [2022-07-21 17:20:14,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:14,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:14,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:14,650 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) [2022-07-21 17:20:14,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 17:20:14,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:20:14,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:20:14,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-21 17:20:15,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:20:15,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564115489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:15,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:20:15,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-21 17:20:15,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349187638] [2022-07-21 17:20:15,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:15,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:15,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:15,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:20:15,047 INFO L87 Difference]: Start difference. First operand 95 states and 98 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) [2022-07-21 17:20:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:15,047 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-07-21 17:20:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:20:15,048 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 70 [2022-07-21 17:20:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:15,048 INFO L225 Difference]: With dead ends: 94 [2022-07-21 17:20:15,048 INFO L226 Difference]: Without dead ends: 78 [2022-07-21 17:20:15,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:20:15,049 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 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 [2022-07-21 17:20:15,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-07-21 17:20:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-21 17:20:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-21 17:20:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 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) [2022-07-21 17:20:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-07-21 17:20:15,051 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 70 [2022-07-21 17:20:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:15,051 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-07-21 17:20:15,051 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) [2022-07-21 17:20:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-07-21 17:20:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-21 17:20:15,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:15,052 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-21 17:20:15,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:15,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:15,278 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1078992381, now seen corresponding path program 2 times [2022-07-21 17:20:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:15,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26740435] [2022-07-21 17:20:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:15,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 17:20:15,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:15,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26740435] [2022-07-21 17:20:15,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26740435] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:15,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576520689] [2022-07-21 17:20:15,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:15,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:15,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:15,363 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) [2022-07-21 17:20:15,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 17:20:15,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:20:15,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:15,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:20:15,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:15,444 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:20:15,444 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 [2022-07-21 17:20:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 17:20:15,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 17:20:15,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576520689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:15,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:15,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-07-21 17:20:15,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353961273] [2022-07-21 17:20:15,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:15,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:20:15,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:15,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:20:15,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:20:15,876 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 11 states, 10 states have (on average 6.4) internal successors, (64), 11 states have internal predecessors, (64), 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) [2022-07-21 17:20:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:15,904 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2022-07-21 17:20:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:20:15,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.4) internal successors, (64), 11 states have internal predecessors, (64), 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 77 [2022-07-21 17:20:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:15,906 INFO L225 Difference]: With dead ends: 77 [2022-07-21 17:20:15,906 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 17:20:15,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:20:15,907 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:15,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 16 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:15,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 17:20:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 17:20:15,908 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) [2022-07-21 17:20:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 17:20:15,908 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2022-07-21 17:20:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:15,908 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 17:20:15,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.4) internal successors, (64), 11 states have internal predecessors, (64), 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) [2022-07-21 17:20:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 17:20:15,909 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 17:20:15,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2022-07-21 17:20:15,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2022-07-21 17:20:15,911 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-07-21 17:20:15,912 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-07-21 17:20:15,912 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-07-21 17:20:15,912 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2022-07-21 17:20:15,912 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2022-07-21 17:20:15,912 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-07-21 17:20:15,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:16,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:16,134 INFO L356 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:16,135 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 17:20:16,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:20:16 BoogieIcfgContainer [2022-07-21 17:20:16,137 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 17:20:16,138 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 17:20:16,138 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 17:20:16,138 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 17:20:16,139 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:20:03" (3/4) ... [2022-07-21 17:20:16,141 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 17:20:16,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-07-21 17:20:16,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-21 17:20:16,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-21 17:20:16,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 17:20:16,169 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 17:20:16,169 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 17:20:16,170 INFO L158 Benchmark]: Toolchain (without parser) took 13355.81ms. Allocated memory was 58.7MB in the beginning and 107.0MB in the end (delta: 48.2MB). Free memory was 39.5MB in the beginning and 27.5MB in the end (delta: 12.0MB). Peak memory consumption was 59.6MB. Max. memory is 16.1GB. [2022-07-21 17:20:16,170 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 44.0MB. Free memory was 26.3MB in the beginning and 26.2MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:20:16,170 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.17ms. Allocated memory is still 58.7MB. Free memory was 39.3MB in the beginning and 42.9MB in the end (delta: -3.7MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. [2022-07-21 17:20:16,170 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.43ms. Allocated memory is still 58.7MB. Free memory was 42.9MB in the beginning and 41.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:20:16,171 INFO L158 Benchmark]: Boogie Preprocessor took 21.97ms. Allocated memory is still 58.7MB. Free memory was 41.4MB in the beginning and 40.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:20:16,171 INFO L158 Benchmark]: RCFGBuilder took 318.53ms. Allocated memory is still 58.7MB. Free memory was 40.2MB in the beginning and 29.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 17:20:16,171 INFO L158 Benchmark]: TraceAbstraction took 12761.06ms. Allocated memory was 58.7MB in the beginning and 107.0MB in the end (delta: 48.2MB). Free memory was 29.1MB in the beginning and 29.6MB in the end (delta: -458.3kB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2022-07-21 17:20:16,172 INFO L158 Benchmark]: Witness Printer took 31.36ms. Allocated memory is still 107.0MB. Free memory was 29.6MB in the beginning and 27.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:20:16,173 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 44.0MB. Free memory was 26.3MB in the beginning and 26.2MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 171.17ms. Allocated memory is still 58.7MB. Free memory was 39.3MB in the beginning and 42.9MB in the end (delta: -3.7MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.43ms. Allocated memory is still 58.7MB. Free memory was 42.9MB in the beginning and 41.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.97ms. Allocated memory is still 58.7MB. Free memory was 41.4MB in the beginning and 40.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 318.53ms. Allocated memory is still 58.7MB. Free memory was 40.2MB in the beginning and 29.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 12761.06ms. Allocated memory was 58.7MB in the beginning and 107.0MB in the end (delta: 48.2MB). Free memory was 29.1MB in the beginning and 29.6MB in the end (delta: -458.3kB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * Witness Printer took 31.36ms. Allocated memory is still 107.0MB. Free memory was 29.6MB in the beginning and 27.5MB in the end (delta: 2.0MB). 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: 18]: 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: 23]: 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: 12.7s, OverallIterations: 22, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1928 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1928 mSDsluCounter, 1222 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25 IncrementalHoareTripleChecker+Unchecked, 811 mSDsCounter, 340 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1782 IncrementalHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 340 mSolverCounterUnsat, 411 mSDtfsCounter, 1782 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1125 GetRequests, 891 SyntacticMatches, 7 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=15, InterpolantAutomatonStates: 157, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 358 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 1186 NumberOfCodeBlocks, 972 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 1543 ConstructedInterpolants, 116 QuantifiedInterpolants, 13298 SizeOfPredicates, 63 NumberOfNonLiveVariables, 1680 ConjunctsInSsa, 187 ConjunctsInUnsatCore, 48 InterpolantComputations, 11 PerfectInterpolantSequences, 1365/2646 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! [2022-07-21 17:20:16,207 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