./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 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/ArraysOfVariableLength5.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 c60dc3ce59c2c65912da9b7b458247bdc42b4524b29b39bec7ce63758c18c031 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:53:15,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:53:15,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:53:15,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:53:15,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:53:15,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:53:15,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:53:15,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:53:15,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:53:15,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:53:15,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:53:15,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:53:15,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:53:15,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:53:15,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:53:15,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:53:15,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:53:15,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:53:15,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:53:15,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:53:15,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:53:15,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:53:15,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:53:15,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:53:15,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:53:15,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:53:15,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:53:15,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:53:15,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:53:15,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:53:15,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:53:15,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:53:15,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:53:15,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:53:15,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:53:15,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:53:15,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:53:15,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:53:15,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:53:15,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:53:15,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:53:15,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:53:15,696 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:53:15,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:53:15,697 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:53:15,697 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:53:15,698 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:53:15,698 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:53:15,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:53:15,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:53:15,699 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:53:15,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:53:15,700 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:53:15,700 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:53:15,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:53:15,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:53:15,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:53:15,701 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:53:15,701 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:53:15,701 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:53:15,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:53:15,701 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:53:15,702 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:53:15,702 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:53:15,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:53:15,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:53:15,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:53:15,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:53:15,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:53:15,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:53:15,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:53:15,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:53:15,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c60dc3ce59c2c65912da9b7b458247bdc42b4524b29b39bec7ce63758c18c031 [2021-12-28 05:53:15,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:53:15,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:53:15,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:53:15,947 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:53:15,948 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:53:15,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2021-12-28 05:53:15,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac36684c/191a0b21f4a64598acf5bdbf26d49c2c/FLAGd25c118d7 [2021-12-28 05:53:16,345 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:53:16,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2021-12-28 05:53:16,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac36684c/191a0b21f4a64598acf5bdbf26d49c2c/FLAGd25c118d7 [2021-12-28 05:53:16,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac36684c/191a0b21f4a64598acf5bdbf26d49c2c [2021-12-28 05:53:16,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:53:16,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:53:16,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:53:16,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:53:16,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:53:16,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b9328f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16, skipping insertion in model container [2021-12-28 05:53:16,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:53:16,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:53:16,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:53:16,482 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:53:16,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:53:16,506 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:53:16,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16 WrapperNode [2021-12-28 05:53:16,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:53:16,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:53:16,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:53:16,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:53:16,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,564 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-12-28 05:53:16,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:53:16,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:53:16,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:53:16,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:53:16,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:53:16,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:53:16,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:53:16,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:53:16,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (1/1) ... [2021-12-28 05:53:16,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:53:16,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:16,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 05:53:16,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 05:53:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 05:53:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:53:16,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:53:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 05:53:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 05:53:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:53:16,723 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:53:16,724 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:53:16,906 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:53:16,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:53:16,910 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 05:53:16,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:53:16 BoogieIcfgContainer [2021-12-28 05:53:16,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:53:16,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:53:16,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:53:16,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:53:16,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:53:16" (1/3) ... [2021-12-28 05:53:16,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3428a60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:53:16, skipping insertion in model container [2021-12-28 05:53:16,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:53:16" (2/3) ... [2021-12-28 05:53:16,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3428a60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:53:16, skipping insertion in model container [2021-12-28 05:53:16,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:53:16" (3/3) ... [2021-12-28 05:53:16,917 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2021-12-28 05:53:16,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:53:16,935 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-28 05:53:16,976 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:53:16,983 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 05:53:16,983 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-28 05:53:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-28 05:53:17,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:17,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-28 05:53:17,004 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:17,008 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-12-28 05:53:17,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:17,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183266892] [2021-12-28 05:53:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:17,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:17,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:17,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183266892] [2021-12-28 05:53:17,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183266892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:53:17,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:53:17,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:53:17,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200265535] [2021-12-28 05:53:17,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:53:17,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:53:17,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:17,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:53:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:53:17,231 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:17,318 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2021-12-28 05:53:17,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:53:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-28 05:53:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:17,329 INFO L225 Difference]: With dead ends: 76 [2021-12-28 05:53:17,329 INFO L226 Difference]: Without dead ends: 68 [2021-12-28 05:53:17,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:53:17,335 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:17,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 61 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:53:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-28 05:53:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 32. [2021-12-28 05:53:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-28 05:53:17,370 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 5 [2021-12-28 05:53:17,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:17,370 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-28 05:53:17,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-28 05:53:17,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:53:17,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:17,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:17,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 05:53:17,372 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-12-28 05:53:17,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:17,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031638184] [2021-12-28 05:53:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:17,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:17,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:17,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031638184] [2021-12-28 05:53:17,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031638184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:53:17,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:53:17,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:53:17,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627746290] [2021-12-28 05:53:17,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:53:17,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:53:17,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:17,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:53:17,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:53:17,466 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:17,479 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-28 05:53:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:53:17,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-28 05:53:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:17,480 INFO L225 Difference]: With dead ends: 30 [2021-12-28 05:53:17,480 INFO L226 Difference]: Without dead ends: 30 [2021-12-28 05:53:17,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:53:17,481 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:17,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:53:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-28 05:53:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-28 05:53:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.375) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-28 05:53:17,484 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 7 [2021-12-28 05:53:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:17,485 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-28 05:53:17,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-28 05:53:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:53:17,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:17,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:17,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 05:53:17,486 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:17,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:17,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810360, now seen corresponding path program 1 times [2021-12-28 05:53:17,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:17,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488440402] [2021-12-28 05:53:17,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:17,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:17,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:17,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488440402] [2021-12-28 05:53:17,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488440402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:53:17,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:53:17,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:53:17,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292393430] [2021-12-28 05:53:17,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:53:17,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:53:17,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:53:17,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:53:17,569 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:17,590 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-28 05:53:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:53:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-28 05:53:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:17,591 INFO L225 Difference]: With dead ends: 35 [2021-12-28 05:53:17,591 INFO L226 Difference]: Without dead ends: 35 [2021-12-28 05:53:17,592 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:53:17,592 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:17,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:53:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-28 05:53:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-12-28 05:53:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-28 05:53:17,605 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2021-12-28 05:53:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:17,606 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-28 05:53:17,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-28 05:53:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-28 05:53:17,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:17,607 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:17,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 05:53:17,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash -352773613, now seen corresponding path program 1 times [2021-12-28 05:53:17,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:17,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805879975] [2021-12-28 05:53:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:17,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:17,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805879975] [2021-12-28 05:53:17,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805879975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:53:17,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:53:17,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:53:17,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772842899] [2021-12-28 05:53:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:53:17,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:53:17,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:53:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:53:17,669 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:17,686 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-12-28 05:53:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:53:17,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-28 05:53:17,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:17,687 INFO L225 Difference]: With dead ends: 58 [2021-12-28 05:53:17,687 INFO L226 Difference]: Without dead ends: 58 [2021-12-28 05:53:17,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:53:17,688 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:17,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 43 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:53:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-28 05:53:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2021-12-28 05:53:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-28 05:53:17,696 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 12 [2021-12-28 05:53:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:17,697 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-28 05:53:17,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-28 05:53:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:53:17,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:17,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:17,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 05:53:17,698 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:17,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:17,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1948884381, now seen corresponding path program 1 times [2021-12-28 05:53:17,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:17,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138948955] [2021-12-28 05:53:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:17,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:17,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:17,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138948955] [2021-12-28 05:53:17,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138948955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:17,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299177683] [2021-12-28 05:53:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:17,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:17,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:17,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 05:53:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 05:53:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:18,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:18,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-28 05:53:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:18,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299177683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:18,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:18,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-28 05:53:18,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402409708] [2021-12-28 05:53:18,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:18,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 05:53:18,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:18,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 05:53:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:53:18,157 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:18,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:18,249 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-12-28 05:53:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:53:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 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 13 [2021-12-28 05:53:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:18,250 INFO L225 Difference]: With dead ends: 41 [2021-12-28 05:53:18,250 INFO L226 Difference]: Without dead ends: 41 [2021-12-28 05:53:18,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:53:18,258 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:18,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 42 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:53:18,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-28 05:53:18,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-12-28 05:53:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-28 05:53:18,265 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 13 [2021-12-28 05:53:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:18,265 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-28 05:53:18,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-28 05:53:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:53:18,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:18,268 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:18,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 05:53:18,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:18,480 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1948919938, now seen corresponding path program 1 times [2021-12-28 05:53:18,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:18,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174829121] [2021-12-28 05:53:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:18,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:18,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174829121] [2021-12-28 05:53:18,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174829121] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577027882] [2021-12-28 05:53:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:18,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:18,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:18,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:18,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 05:53:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:18,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 05:53:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:18,585 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:53:18,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:53:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:18,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:18,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577027882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:18,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:18,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2021-12-28 05:53:18,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125149444] [2021-12-28 05:53:18,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:18,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:53:18,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:18,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:53:18,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:53:18,639 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:18,657 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-12-28 05:53:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:53:18,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 05:53:18,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:18,660 INFO L225 Difference]: With dead ends: 35 [2021-12-28 05:53:18,660 INFO L226 Difference]: Without dead ends: 35 [2021-12-28 05:53:18,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:53:18,661 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:18,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:53:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-28 05:53:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-28 05:53:18,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.3) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:18,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-28 05:53:18,664 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2021-12-28 05:53:18,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:18,665 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-28 05:53:18,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-28 05:53:18,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:53:18,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:18,666 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:18,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-28 05:53:18,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-28 05:53:18,883 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:18,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1948919939, now seen corresponding path program 1 times [2021-12-28 05:53:18,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:18,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553735201] [2021-12-28 05:53:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:18,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:18,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:18,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553735201] [2021-12-28 05:53:18,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553735201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:18,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139178798] [2021-12-28 05:53:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:18,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:18,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:18,930 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:18,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 05:53:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:18,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-28 05:53:18,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:18,996 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:53:18,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:53:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:19,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:19,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139178798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:19,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:19,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-12-28 05:53:19,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607361121] [2021-12-28 05:53:19,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:19,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:53:19,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:53:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:53:19,144 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:19,212 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-12-28 05:53:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:53:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 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) Word has length 13 [2021-12-28 05:53:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:19,214 INFO L225 Difference]: With dead ends: 80 [2021-12-28 05:53:19,214 INFO L226 Difference]: Without dead ends: 80 [2021-12-28 05:53:19,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:53:19,216 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 146 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:19,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 49 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:53:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-28 05:53:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 41. [2021-12-28 05:53:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-28 05:53:19,223 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 13 [2021-12-28 05:53:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:19,225 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-28 05:53:19,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-28 05:53:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-28 05:53:19,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:19,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:19,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:19,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:19,443 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:19,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:19,444 INFO L85 PathProgramCache]: Analyzing trace with hash 286926307, now seen corresponding path program 1 times [2021-12-28 05:53:19,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:19,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930818328] [2021-12-28 05:53:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:19,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:19,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:19,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930818328] [2021-12-28 05:53:19,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930818328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:19,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251705275] [2021-12-28 05:53:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:19,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:19,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:19,504 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:19,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 05:53:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:19,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 05:53:19,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:19,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:19,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251705275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:19,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:19,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-28 05:53:19,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488258931] [2021-12-28 05:53:19,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:19,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:53:19,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:53:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:53:19,599 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:19,683 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-12-28 05:53:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:53:19,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-28 05:53:19,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:19,684 INFO L225 Difference]: With dead ends: 48 [2021-12-28 05:53:19,684 INFO L226 Difference]: Without dead ends: 48 [2021-12-28 05:53:19,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:53:19,685 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:19,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 64 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:53:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-28 05:53:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-12-28 05:53:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-12-28 05:53:19,687 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 14 [2021-12-28 05:53:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:19,688 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-12-28 05:53:19,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-12-28 05:53:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-28 05:53:19,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:19,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:19,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:19,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:19,905 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:19,905 INFO L85 PathProgramCache]: Analyzing trace with hash -153316857, now seen corresponding path program 1 times [2021-12-28 05:53:19,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:19,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712308931] [2021-12-28 05:53:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:19,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:19,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712308931] [2021-12-28 05:53:19,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712308931] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46367524] [2021-12-28 05:53:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:19,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:19,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:19,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:19,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 05:53:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-28 05:53:19,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:20,074 INFO L387 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 [2021-12-28 05:53:20,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:53:20,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:53:20,128 INFO L387 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 [2021-12-28 05:53:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:20,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:20,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-28 05:53:20,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-28 05:53:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:20,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46367524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:20,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:20,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 17 [2021-12-28 05:53:20,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835449931] [2021-12-28 05:53:20,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:20,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 05:53:20,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 05:53:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:53:20,251 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:20,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:20,398 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-12-28 05:53:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 05:53:20,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-28 05:53:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:20,399 INFO L225 Difference]: With dead ends: 78 [2021-12-28 05:53:20,399 INFO L226 Difference]: Without dead ends: 78 [2021-12-28 05:53:20,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:53:20,400 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:20,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 112 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:53:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-28 05:53:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-12-28 05:53:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-12-28 05:53:20,402 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 16 [2021-12-28 05:53:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:20,402 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-12-28 05:53:20,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-12-28 05:53:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-28 05:53:20,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:20,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:20,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:20,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:20,615 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1980019516, now seen corresponding path program 1 times [2021-12-28 05:53:20,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:20,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346627314] [2021-12-28 05:53:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:20,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:20,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:20,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346627314] [2021-12-28 05:53:20,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346627314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:20,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809711800] [2021-12-28 05:53:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:20,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:20,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:20,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:20,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 05:53:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:20,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 05:53:20,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:20,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:53:20,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809711800] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:20,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:20,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-28 05:53:20,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342151065] [2021-12-28 05:53:20,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:20,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:53:20,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:20,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:53:20,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:53:20,790 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-12-28 05:53:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:20,914 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2021-12-28 05:53:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:53:20,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 17 [2021-12-28 05:53:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:20,915 INFO L225 Difference]: With dead ends: 95 [2021-12-28 05:53:20,915 INFO L226 Difference]: Without dead ends: 95 [2021-12-28 05:53:20,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:53:20,916 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 212 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:20,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 71 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:53:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-28 05:53:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 53. [2021-12-28 05:53:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-12-28 05:53:20,918 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 17 [2021-12-28 05:53:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:20,918 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-12-28 05:53:20,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-12-28 05:53:20,919 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-12-28 05:53:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 05:53:20,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:20,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:20,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:21,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:21,127 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:21,128 INFO L85 PathProgramCache]: Analyzing trace with hash -128290732, now seen corresponding path program 1 times [2021-12-28 05:53:21,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:21,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970474308] [2021-12-28 05:53:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:21,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:21,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:21,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970474308] [2021-12-28 05:53:21,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970474308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:21,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008398405] [2021-12-28 05:53:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:21,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:21,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:21,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:21,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 05:53:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-28 05:53:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:21,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:53:21,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-28 05:53:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:21,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:21,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008398405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:21,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:21,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2021-12-28 05:53:21,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591168854] [2021-12-28 05:53:21,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:21,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 05:53:21,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 05:53:21,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:53:21,440 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:21,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:21,495 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2021-12-28 05:53:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:53:21,495 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2021-12-28 05:53:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:21,496 INFO L225 Difference]: With dead ends: 100 [2021-12-28 05:53:21,496 INFO L226 Difference]: Without dead ends: 100 [2021-12-28 05:53:21,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:53:21,497 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:21,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 71 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:53:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-28 05:53:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-12-28 05:53:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 93 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2021-12-28 05:53:21,512 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 19 [2021-12-28 05:53:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:21,514 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2021-12-28 05:53:21,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2021-12-28 05:53:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-28 05:53:21,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:21,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:21,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:21,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:21,728 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:21,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1688999147, now seen corresponding path program 1 times [2021-12-28 05:53:21,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:21,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017558568] [2021-12-28 05:53:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:21,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:21,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:21,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017558568] [2021-12-28 05:53:21,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017558568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:21,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207202281] [2021-12-28 05:53:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:21,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:21,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:21,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:21,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 05:53:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-28 05:53:21,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:21,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:53:21,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:53:21,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-28 05:53:21,993 INFO L387 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 19 treesize of output 7 [2021-12-28 05:53:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:22,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:24,104 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_41| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_41|)) (forall ((v_ArrVal_165 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_41| 4)) v_ArrVal_165) |c_ULTIMATE.start_main_~#b~0#1.offset|) 0)))) is different from false [2021-12-28 05:53:24,146 INFO L387 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 21 treesize of output 19 [2021-12-28 05:53:24,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 150 [2021-12-28 05:53:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-12-28 05:53:24,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207202281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:24,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:24,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 11] total 21 [2021-12-28 05:53:24,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52197325] [2021-12-28 05:53:24,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:24,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 05:53:24,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 05:53:24,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=308, Unknown=1, NotChecked=36, Total=420 [2021-12-28 05:53:24,305 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:26,373 WARN L838 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_main_#t~ret3#1|) (= |c_ULTIMATE.start_foo_~i~0#1| 0) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4))) 0) (= |c_ULTIMATE.start_main_~i~1#1| 0) (= |c_ULTIMATE.start_foo_#res#1| 0) (forall ((|v_ULTIMATE.start_main_~i~1#1_41| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_41|)) (forall ((v_ArrVal_165 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_41| 4)) v_ArrVal_165) |c_ULTIMATE.start_main_~#b~0#1.offset|) 0))))) is different from false [2021-12-28 05:53:28,376 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4))) 0) (= |c_ULTIMATE.start_main_~i~1#1| 0) (forall ((|v_ULTIMATE.start_main_~i~1#1_41| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_41|)) (forall ((v_ArrVal_165 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_41| 4)) v_ArrVal_165) |c_ULTIMATE.start_main_~#b~0#1.offset|) 0))))) is different from false [2021-12-28 05:53:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:28,497 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2021-12-28 05:53:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 05:53:28,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 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 28 [2021-12-28 05:53:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:28,499 INFO L225 Difference]: With dead ends: 111 [2021-12-28 05:53:28,499 INFO L226 Difference]: Without dead ends: 111 [2021-12-28 05:53:28,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=127, Invalid=482, Unknown=3, NotChecked=144, Total=756 [2021-12-28 05:53:28,500 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 164 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:28,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 95 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 194 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-28 05:53:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-28 05:53:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2021-12-28 05:53:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 97 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2021-12-28 05:53:28,503 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 28 [2021-12-28 05:53:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:28,503 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2021-12-28 05:53:28,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2021-12-28 05:53:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 05:53:28,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:28,504 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-28 05:53:28,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-28 05:53:28,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-28 05:53:28,707 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash -702798240, now seen corresponding path program 2 times [2021-12-28 05:53:28,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926431314] [2021-12-28 05:53:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:28,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 05:53:28,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:28,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926431314] [2021-12-28 05:53:28,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926431314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:28,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555784314] [2021-12-28 05:53:28,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:53:28,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:28,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:28,746 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:28,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 05:53:28,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:53:28,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:53:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 05:53:28,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:28,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:29,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555784314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:29,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:29,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 14 [2021-12-28 05:53:29,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302048028] [2021-12-28 05:53:29,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:29,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 05:53:29,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:29,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 05:53:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:53:29,031 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 15 states, 14 states have (on average 5.5) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:29,743 INFO L93 Difference]: Finished difference Result 300 states and 320 transitions. [2021-12-28 05:53:29,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-28 05:53:29,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.5) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2021-12-28 05:53:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:29,745 INFO L225 Difference]: With dead ends: 300 [2021-12-28 05:53:29,745 INFO L226 Difference]: Without dead ends: 300 [2021-12-28 05:53:29,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=606, Invalid=1464, Unknown=0, NotChecked=0, Total=2070 [2021-12-28 05:53:29,746 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1190 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:29,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 76 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:53:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-28 05:53:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 97. [2021-12-28 05:53:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 96 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:29,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2021-12-28 05:53:29,752 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 29 [2021-12-28 05:53:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:29,753 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2021-12-28 05:53:29,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.5) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2021-12-28 05:53:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 05:53:29,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:29,755 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-28 05:53:29,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:29,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-28 05:53:29,975 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:29,976 INFO L85 PathProgramCache]: Analyzing trace with hash 777529983, now seen corresponding path program 1 times [2021-12-28 05:53:29,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:29,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638521596] [2021-12-28 05:53:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:29,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:30,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638521596] [2021-12-28 05:53:30,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638521596] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41118831] [2021-12-28 05:53:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:30,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:30,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:30,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:30,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 05:53:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:30,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 05:53:30,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:30,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:53:30,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41118831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:30,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:30,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-28 05:53:30,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115117687] [2021-12-28 05:53:30,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:30,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 05:53:30,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:30,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 05:53:30,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:53:30,252 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:30,494 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2021-12-28 05:53:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 05:53:30,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 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 35 [2021-12-28 05:53:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:30,495 INFO L225 Difference]: With dead ends: 172 [2021-12-28 05:53:30,495 INFO L226 Difference]: Without dead ends: 172 [2021-12-28 05:53:30,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=533, Unknown=0, NotChecked=0, Total=756 [2021-12-28 05:53:30,496 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 257 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:30,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 126 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:53:30,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-28 05:53:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 95. [2021-12-28 05:53:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.164835164835165) internal successors, (106), 94 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-12-28 05:53:30,498 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 35 [2021-12-28 05:53:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:30,498 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-12-28 05:53:30,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-12-28 05:53:30,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 05:53:30,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:30,499 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:30,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:30,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 05:53:30,699 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1252804968, now seen corresponding path program 1 times [2021-12-28 05:53:30,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053392764] [2021-12-28 05:53:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:30,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 05:53:30,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:30,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053392764] [2021-12-28 05:53:30,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053392764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:30,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53976586] [2021-12-28 05:53:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:30,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:30,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:30,760 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:30,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 05:53:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:30,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 05:53:30,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 05:53:30,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 05:53:30,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53976586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:30,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:30,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-12-28 05:53:30,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919191564] [2021-12-28 05:53:30,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:30,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:53:30,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:30,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:53:30,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:53:30,955 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:31,073 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2021-12-28 05:53:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:53:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 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 41 [2021-12-28 05:53:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:31,074 INFO L225 Difference]: With dead ends: 103 [2021-12-28 05:53:31,074 INFO L226 Difference]: Without dead ends: 103 [2021-12-28 05:53:31,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:53:31,075 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:31,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 83 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:53:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-28 05:53:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2021-12-28 05:53:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.1318681318681318) internal successors, (103), 94 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-12-28 05:53:31,077 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 41 [2021-12-28 05:53:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:31,077 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-12-28 05:53:31,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-12-28 05:53:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 05:53:31,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:31,077 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:31,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:31,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 05:53:31,280 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2037391793, now seen corresponding path program 2 times [2021-12-28 05:53:31,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:31,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166522310] [2021-12-28 05:53:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:31,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-28 05:53:31,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166522310] [2021-12-28 05:53:31,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166522310] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:31,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079586646] [2021-12-28 05:53:31,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:53:31,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:31,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:31,344 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:31,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 05:53:31,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:53:31,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:53:31,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 05:53:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 05:53:31,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:31,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-28 05:53:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 05:53:31,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079586646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:31,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:31,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2021-12-28 05:53:31,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70350153] [2021-12-28 05:53:31,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:31,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 05:53:31,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 05:53:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-12-28 05:53:31,865 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 18 states, 18 states have (on average 6.666666666666667) internal successors, (120), 18 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:32,037 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2021-12-28 05:53:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:53:32,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.666666666666667) internal successors, (120), 18 states have internal predecessors, (120), 0 states have call successors, (0), 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 46 [2021-12-28 05:53:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:32,038 INFO L225 Difference]: With dead ends: 115 [2021-12-28 05:53:32,038 INFO L226 Difference]: Without dead ends: 115 [2021-12-28 05:53:32,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-12-28 05:53:32,039 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 341 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:32,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 141 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:53:32,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-28 05:53:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2021-12-28 05:53:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 98 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-12-28 05:53:32,041 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 46 [2021-12-28 05:53:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:32,041 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-12-28 05:53:32,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.666666666666667) internal successors, (120), 18 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-12-28 05:53:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 05:53:32,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:32,042 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-12-28 05:53:32,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-28 05:53:32,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-28 05:53:32,251 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:32,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1258264466, now seen corresponding path program 2 times [2021-12-28 05:53:32,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:32,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071245208] [2021-12-28 05:53:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:32,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 05:53:32,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:32,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071245208] [2021-12-28 05:53:32,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071245208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:32,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119800542] [2021-12-28 05:53:32,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:53:32,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:32,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:32,359 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:32,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 05:53:32,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 05:53:32,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:53:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-28 05:53:32,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:32,414 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:53:32,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:53:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-28 05:53:32,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-28 05:53:32,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119800542] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:32,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:32,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 14 [2021-12-28 05:53:32,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416708283] [2021-12-28 05:53:32,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:32,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 05:53:32,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:32,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 05:53:32,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:53:32,825 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 15 states, 14 states have (on average 6.0) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:33,088 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2021-12-28 05:53:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 05:53:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.0) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 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 52 [2021-12-28 05:53:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:33,089 INFO L225 Difference]: With dead ends: 124 [2021-12-28 05:53:33,089 INFO L226 Difference]: Without dead ends: 124 [2021-12-28 05:53:33,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-12-28 05:53:33,090 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 210 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:33,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 70 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:53:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-28 05:53:33,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2021-12-28 05:53:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 91 states have (on average 1.098901098901099) internal successors, (100), 93 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) [2021-12-28 05:53:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-12-28 05:53:33,092 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 52 [2021-12-28 05:53:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:33,092 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-12-28 05:53:33,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.0) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-12-28 05:53:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 05:53:33,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:33,093 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:33,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:33,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-28 05:53:33,307 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1542665240, now seen corresponding path program 1 times [2021-12-28 05:53:33,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:33,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443056704] [2021-12-28 05:53:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:33,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 58 proven. 50 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 05:53:33,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:33,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443056704] [2021-12-28 05:53:33,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443056704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:33,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637502138] [2021-12-28 05:53:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:33,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:33,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:33,401 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:33,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 05:53:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 05:53:33,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 59 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 05:53:33,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:53:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 59 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 05:53:33,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637502138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:53:33,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:53:33,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-28 05:53:33,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563501787] [2021-12-28 05:53:33,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:53:33,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 05:53:33,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:33,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 05:53:33,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:53:33,740 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:33,953 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-12-28 05:53:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:53:33,954 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 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 66 [2021-12-28 05:53:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:33,954 INFO L225 Difference]: With dead ends: 118 [2021-12-28 05:53:33,954 INFO L226 Difference]: Without dead ends: 118 [2021-12-28 05:53:33,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:53:33,955 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 83 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:33,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 121 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:53:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-28 05:53:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2021-12-28 05:53:33,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 103 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2021-12-28 05:53:33,957 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 66 [2021-12-28 05:53:33,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:33,958 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2021-12-28 05:53:33,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:33,958 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2021-12-28 05:53:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 05:53:33,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:33,958 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:33,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:34,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:34,167 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1267590951, now seen corresponding path program 2 times [2021-12-28 05:53:34,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:34,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117740634] [2021-12-28 05:53:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:34,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-28 05:53:34,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117740634] [2021-12-28 05:53:34,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117740634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333036516] [2021-12-28 05:53:34,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:53:34,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:34,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:34,255 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:34,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 05:53:34,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 05:53:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:53:34,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 05:53:34,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-28 05:53:34,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:53:34,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333036516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:53:34,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:53:34,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-28 05:53:34,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872862709] [2021-12-28 05:53:34,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:53:34,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:53:34,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:53:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:53:34,778 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:34,779 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-12-28 05:53:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:53:34,779 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 71 [2021-12-28 05:53:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:34,779 INFO L225 Difference]: With dead ends: 105 [2021-12-28 05:53:34,780 INFO L226 Difference]: Without dead ends: 103 [2021-12-28 05:53:34,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:53:34,780 INFO L933 BasicCegarLoop]: 19 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, 35 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:34,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-28 05:53:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-28 05:53:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-28 05:53:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 100 states have (on average 1.06) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2021-12-28 05:53:34,782 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 71 [2021-12-28 05:53:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:34,783 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2021-12-28 05:53:34,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2021-12-28 05:53:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 05:53:34,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:34,783 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-28 05:53:34,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:35,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:35,003 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:35,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:35,003 INFO L85 PathProgramCache]: Analyzing trace with hash 12177425, now seen corresponding path program 3 times [2021-12-28 05:53:35,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:35,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142577258] [2021-12-28 05:53:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:35,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-28 05:53:35,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142577258] [2021-12-28 05:53:35,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142577258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865486513] [2021-12-28 05:53:35,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:53:35,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:35,085 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:35,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-28 05:53:35,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-28 05:53:35,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:53:35,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 05:53:35,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:35,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:53:35,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-28 05:53:35,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:53:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-28 05:53:35,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:53:35,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865486513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:53:35,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:53:35,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2021-12-28 05:53:35,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770801407] [2021-12-28 05:53:35,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:53:35,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:53:35,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:53:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:53:35,461 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:35,492 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-12-28 05:53:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:53:35,492 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 76 [2021-12-28 05:53:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:35,493 INFO L225 Difference]: With dead ends: 101 [2021-12-28 05:53:35,493 INFO L226 Difference]: Without dead ends: 101 [2021-12-28 05:53:35,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:53:35,493 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:35,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:53:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-28 05:53:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2021-12-28 05:53:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-12-28 05:53:35,495 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 76 [2021-12-28 05:53:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:35,495 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-12-28 05:53:35,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-12-28 05:53:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 05:53:35,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:53:35,496 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:35,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:35,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:35,696 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:53:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:53:35,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1746186495, now seen corresponding path program 1 times [2021-12-28 05:53:35,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:53:35,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009456542] [2021-12-28 05:53:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:35,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:53:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-28 05:53:35,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:53:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009456542] [2021-12-28 05:53:35,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009456542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:53:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83398902] [2021-12-28 05:53:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:53:35,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:35,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:53:35,765 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:53:35,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-28 05:53:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:53:35,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-28 05:53:35,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:53:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-28 05:53:36,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:53:36,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83398902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:53:36,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:53:36,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-28 05:53:36,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426402310] [2021-12-28 05:53:36,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:53:36,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:53:36,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:53:36,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:53:36,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:53:36,368 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:53:36,369 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-12-28 05:53:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:53:36,369 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 81 [2021-12-28 05:53:36,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:53:36,370 INFO L225 Difference]: With dead ends: 81 [2021-12-28 05:53:36,370 INFO L226 Difference]: Without dead ends: 0 [2021-12-28 05:53:36,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:53:36,371 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:53:36,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-12-28 05:53:36,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-28 05:53:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-28 05:53:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-28 05:53:36,372 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 81 [2021-12-28 05:53:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:53:36,372 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 05:53:36,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:53:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-28 05:53:36,373 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-28 05:53:36,375 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-12-28 05:53:36,375 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-12-28 05:53:36,375 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-12-28 05:53:36,375 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (4 of 8 remaining) [2021-12-28 05:53:36,375 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (3 of 8 remaining) [2021-12-28 05:53:36,376 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (2 of 8 remaining) [2021-12-28 05:53:36,376 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (1 of 8 remaining) [2021-12-28 05:53:36,376 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-12-28 05:53:36,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-28 05:53:36,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:53:36,594 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:53:36,595 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-28 05:53:36,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.12 05:53:36 BoogieIcfgContainer [2021-12-28 05:53:36,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-28 05:53:36,597 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 05:53:36,597 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 05:53:36,597 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 05:53:36,597 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:53:16" (3/4) ... [2021-12-28 05:53:36,599 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-28 05:53:36,605 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-12-28 05:53:36,605 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-28 05:53:36,606 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-28 05:53:36,606 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-28 05:53:36,629 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-28 05:53:36,629 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 05:53:36,630 INFO L158 Benchmark]: Toolchain (without parser) took 20265.09ms. Allocated memory was 50.3MB in the beginning and 107.0MB in the end (delta: 56.6MB). Free memory was 26.7MB in the beginning and 66.0MB in the end (delta: -39.3MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. [2021-12-28 05:53:36,630 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 50.3MB. Free memory was 32.4MB in the beginning and 32.3MB in the end (delta: 32.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 05:53:36,630 INFO L158 Benchmark]: CACSL2BoogieTranslator took 140.69ms. Allocated memory is still 50.3MB. Free memory was 26.5MB in the beginning and 28.7MB in the end (delta: -2.1MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2021-12-28 05:53:36,631 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.45ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 28.7MB in the beginning and 45.8MB in the end (delta: -17.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-28 05:53:36,631 INFO L158 Benchmark]: Boogie Preprocessor took 26.60ms. Allocated memory is still 60.8MB. Free memory was 45.8MB in the beginning and 44.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 05:53:36,631 INFO L158 Benchmark]: RCFGBuilder took 319.83ms. Allocated memory is still 60.8MB. Free memory was 44.5MB in the beginning and 33.9MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-28 05:53:36,631 INFO L158 Benchmark]: TraceAbstraction took 19684.01ms. Allocated memory was 60.8MB in the beginning and 107.0MB in the end (delta: 46.1MB). Free memory was 33.4MB in the beginning and 68.1MB in the end (delta: -34.7MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2021-12-28 05:53:36,632 INFO L158 Benchmark]: Witness Printer took 32.68ms. Allocated memory is still 107.0MB. Free memory was 68.1MB in the beginning and 66.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 05:53:36,632 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 50.3MB. Free memory was 32.4MB in the beginning and 32.3MB in the end (delta: 32.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 140.69ms. Allocated memory is still 50.3MB. Free memory was 26.5MB in the beginning and 28.7MB in the end (delta: -2.1MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.45ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 28.7MB in the beginning and 45.8MB in the end (delta: -17.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.60ms. Allocated memory is still 60.8MB. Free memory was 45.8MB in the beginning and 44.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 319.83ms. Allocated memory is still 60.8MB. Free memory was 44.5MB in the beginning and 33.9MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 19684.01ms. Allocated memory was 60.8MB in the beginning and 107.0MB in the end (delta: 46.1MB). Free memory was 33.4MB in the beginning and 68.1MB in the end (delta: -34.7MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * Witness Printer took 32.68ms. Allocated memory is still 107.0MB. Free memory was 68.1MB in the beginning and 66.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 19.6s, OverallIterations: 21, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3104 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3104 mSDsluCounter, 1401 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 66 IncrementalHoareTripleChecker+Unchecked, 1002 mSDsCounter, 530 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2384 IncrementalHoareTripleChecker+Invalid, 2980 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 530 mSolverCounterUnsat, 399 mSDtfsCounter, 2384 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1222 GetRequests, 937 SyntacticMatches, 11 SemanticMatches, 274 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=18, InterpolantAutomatonStates: 196, 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, 21 MinimizatonAttempts, 571 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 1291 NumberOfCodeBlocks, 1124 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1641 ConstructedInterpolants, 160 QuantifiedInterpolants, 13334 SizeOfPredicates, 79 NumberOfNonLiveVariables, 2368 ConjunctsInSsa, 230 ConjunctsInUnsatCore, 52 InterpolantComputations, 7 PerfectInterpolantSequences, 1209/2206 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-28 05:53:36,665 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