./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:01:18,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:01:18,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:01:18,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:01:18,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:01:18,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:01:18,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:01:18,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:01:18,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:01:18,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:01:18,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:01:18,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:01:18,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:01:18,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:01:18,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:01:18,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:01:18,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:01:18,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:01:18,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:01:18,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:01:18,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:01:18,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:01:18,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:01:18,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:01:18,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:01:18,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:01:18,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:01:18,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:01:18,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:01:18,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:01:18,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:01:18,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:01:18,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:01:18,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:01:18,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:01:18,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:01:18,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:01:18,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:01:18,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:01:18,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:01:18,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:01:18,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-22 00:01:18,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:01:18,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:01:18,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:01:18,787 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:01:18,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:01:18,788 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:01:18,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:01:18,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:01:18,788 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:01:18,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:01:18,789 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:01:18,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:01:18,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:01:18,790 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:01:18,790 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:01:18,790 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:01:18,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:01:18,790 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:01:18,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:01:18,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:01:18,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:01:18,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:01:18,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:01:18,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:01:18,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:01:18,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:01:18,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:01:18,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:01:18,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 [2021-12-22 00:01:19,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:01:19,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:01:19,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:01:19,047 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:01:19,048 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:01:19,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2021-12-22 00:01:19,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f18b19702/c809eebd87d649e29039a64244b5f114/FLAG9b3e62cf0 [2021-12-22 00:01:19,433 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:01:19,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2021-12-22 00:01:19,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f18b19702/c809eebd87d649e29039a64244b5f114/FLAG9b3e62cf0 [2021-12-22 00:01:19,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f18b19702/c809eebd87d649e29039a64244b5f114 [2021-12-22 00:01:19,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:01:19,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:01:19,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:01:19,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:01:19,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:01:19,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:01:19" (1/1) ... [2021-12-22 00:01:19,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bbd6673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:19, skipping insertion in model container [2021-12-22 00:01:19,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:01:19" (1/1) ... [2021-12-22 00:01:19,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:01:19,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:01:20,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:01:20,158 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:01:20,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:01:20,183 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:01:20,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20 WrapperNode [2021-12-22 00:01:20,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:01:20,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:01:20,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:01:20,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:01:20,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,218 INFO L137 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2021-12-22 00:01:20,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:01:20,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:01:20,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:01:20,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:01:20,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:01:20,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:01:20,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:01:20,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:01:20,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:01:20,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:20,309 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 00:01:20,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 00:01:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 00:01:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:01:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:01:20,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:01:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 00:01:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:01:20,394 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:01:20,395 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:01:20,572 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:01:20,576 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:01:20,576 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 00:01:20,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:01:20 BoogieIcfgContainer [2021-12-22 00:01:20,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:01:20,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:01:20,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:01:20,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:01:20,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:01:19" (1/3) ... [2021-12-22 00:01:20,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e8916c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:01:20, skipping insertion in model container [2021-12-22 00:01:20,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (2/3) ... [2021-12-22 00:01:20,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e8916c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:01:20, skipping insertion in model container [2021-12-22 00:01:20,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:01:20" (3/3) ... [2021-12-22 00:01:20,582 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-2.c [2021-12-22 00:01:20,586 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:01:20,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-12-22 00:01:20,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:01:20,616 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 00:01:20,616 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-12-22 00:01:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 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) [2021-12-22 00:01:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 00:01:20,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:20,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 00:01:20,629 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-22 00:01:20,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:20,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49819761] [2021-12-22 00:01:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:20,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:20,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:20,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49819761] [2021-12-22 00:01:20,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49819761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:20,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:20,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:01:20,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040312018] [2021-12-22 00:01:20,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:20,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:01:20,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:01:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:01:20,762 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:20,819 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-12-22 00:01:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:01:20,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-22 00:01:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:20,826 INFO L225 Difference]: With dead ends: 47 [2021-12-22 00:01:20,826 INFO L226 Difference]: Without dead ends: 45 [2021-12-22 00:01:20,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:01:20,835 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 23 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:20,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 51 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-22 00:01:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-12-22 00:01:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-12-22 00:01:20,864 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 4 [2021-12-22 00:01:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:20,864 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-12-22 00:01:20,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-12-22 00:01:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 00:01:20,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:20,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 00:01:20,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 00:01:20,866 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-22 00:01:20,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:20,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212235223] [2021-12-22 00:01:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:20,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:20,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:20,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212235223] [2021-12-22 00:01:20,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212235223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:20,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:20,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:01:20,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531387441] [2021-12-22 00:01:20,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:20,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:01:20,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:01:20,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:01:20,945 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:20,975 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-12-22 00:01:20,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:01:20,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-22 00:01:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:20,977 INFO L225 Difference]: With dead ends: 41 [2021-12-22 00:01:20,977 INFO L226 Difference]: Without dead ends: 41 [2021-12-22 00:01:20,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:01:20,981 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:20,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-22 00:01:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-12-22 00:01:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-12-22 00:01:20,992 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 4 [2021-12-22 00:01:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:20,992 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-12-22 00:01:20,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:20,993 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-12-22 00:01:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 00:01:20,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:20,994 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:20,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 00:01:20,994 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-12-22 00:01:20,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:20,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487035235] [2021-12-22 00:01:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:20,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:21,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:21,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487035235] [2021-12-22 00:01:21,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487035235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:21,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529931151] [2021-12-22 00:01:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:21,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:21,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:21,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:01:21,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 00:01:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 00:01:21,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:21,258 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:01:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:21,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:21,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529931151] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:21,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:21,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-22 00:01:21,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834194189] [2021-12-22 00:01:21,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:21,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:01:21,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:01:21,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:01:21,452 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:21,582 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-22 00:01:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:01:21,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 00:01:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:21,583 INFO L225 Difference]: With dead ends: 49 [2021-12-22 00:01:21,583 INFO L226 Difference]: Without dead ends: 49 [2021-12-22 00:01:21,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:01:21,584 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:21,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 100 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-22 00:01:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-22 00:01:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.425) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-22 00:01:21,602 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 8 [2021-12-22 00:01:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:21,602 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-22 00:01:21,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-22 00:01:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 00:01:21,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:21,603 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:21,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:21,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:21,804 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:21,805 INFO L85 PathProgramCache]: Analyzing trace with hash 868179552, now seen corresponding path program 1 times [2021-12-22 00:01:21,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:21,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042191406] [2021-12-22 00:01:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:21,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 00:01:21,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042191406] [2021-12-22 00:01:21,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042191406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781822174] [2021-12-22 00:01:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:21,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:21,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:21,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:01:21,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 00:01:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:21,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 00:01:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:21,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:22,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781822174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:22,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:22,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2021-12-22 00:01:22,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393472695] [2021-12-22 00:01:22,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:22,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 00:01:22,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:22,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 00:01:22,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-12-22 00:01:22,049 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:22,225 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2021-12-22 00:01:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 00:01:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-22 00:01:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:22,227 INFO L225 Difference]: With dead ends: 70 [2021-12-22 00:01:22,227 INFO L226 Difference]: Without dead ends: 70 [2021-12-22 00:01:22,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-12-22 00:01:22,228 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:22,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 73 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-22 00:01:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-12-22 00:01:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-12-22 00:01:22,232 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 23 [2021-12-22 00:01:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:22,233 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-12-22 00:01:22,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-12-22 00:01:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 00:01:22,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:22,234 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:22,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:22,452 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,SelfDestructingSolverStorable3 [2021-12-22 00:01:22,452 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1707912335, now seen corresponding path program 1 times [2021-12-22 00:01:22,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:22,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353098709] [2021-12-22 00:01:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:22,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:22,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:22,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353098709] [2021-12-22 00:01:22,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353098709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:22,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780932782] [2021-12-22 00:01:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:22,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:22,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:22,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:01:22,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 00:01:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 00:01:22,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:22,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:22,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780932782] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:22,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:22,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-22 00:01:22,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096943571] [2021-12-22 00:01:22,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:22,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 00:01:22,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:22,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 00:01:22,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 00:01:22,948 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:23,024 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2021-12-22 00:01:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 00:01:23,024 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 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 47 [2021-12-22 00:01:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:23,025 INFO L225 Difference]: With dead ends: 112 [2021-12-22 00:01:23,025 INFO L226 Difference]: Without dead ends: 112 [2021-12-22 00:01:23,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 00:01:23,026 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:23,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:23,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-22 00:01:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-22 00:01:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 111 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2021-12-22 00:01:23,031 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 47 [2021-12-22 00:01:23,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:23,031 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2021-12-22 00:01:23,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2021-12-22 00:01:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 00:01:23,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:23,033 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:23,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:23,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:23,250 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash -726611221, now seen corresponding path program 2 times [2021-12-22 00:01:23,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:23,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699900982] [2021-12-22 00:01:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:23,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:23,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:23,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699900982] [2021-12-22 00:01:23,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699900982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:23,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060037901] [2021-12-22 00:01:23,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:01:23,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:23,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:23,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:01:23,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 00:01:23,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 00:01:23,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:01:23,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 00:01:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:23,760 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:01:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-12-22 00:01:24,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:01:24,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060037901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:24,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:01:24,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [25] total 27 [2021-12-22 00:01:24,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653349924] [2021-12-22 00:01:24,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:24,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:01:24,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:24,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:01:24,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-12-22 00:01:24,189 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:24,226 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-12-22 00:01:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:01:24,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 95 [2021-12-22 00:01:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:24,228 INFO L225 Difference]: With dead ends: 127 [2021-12-22 00:01:24,228 INFO L226 Difference]: Without dead ends: 127 [2021-12-22 00:01:24,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2021-12-22 00:01:24,229 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:24,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-22 00:01:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-12-22 00:01:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 120 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2021-12-22 00:01:24,234 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 95 [2021-12-22 00:01:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:24,234 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2021-12-22 00:01:24,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2021-12-22 00:01:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 00:01:24,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:24,236 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:24,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 00:01:24,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:24,454 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:24,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1806473229, now seen corresponding path program 1 times [2021-12-22 00:01:24,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:24,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659414495] [2021-12-22 00:01:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:24,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-12-22 00:01:24,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:24,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659414495] [2021-12-22 00:01:24,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659414495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:24,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:24,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:01:24,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434178663] [2021-12-22 00:01:24,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:01:24,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:24,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:01:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:01:24,636 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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) [2021-12-22 00:01:24,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:24,640 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2021-12-22 00:01:24,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:01:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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 97 [2021-12-22 00:01:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:24,641 INFO L225 Difference]: With dead ends: 120 [2021-12-22 00:01:24,641 INFO L226 Difference]: Without dead ends: 120 [2021-12-22 00:01:24,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:01:24,641 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:24,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-22 00:01:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-22 00:01:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0862068965517242) internal successors, (126), 119 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2021-12-22 00:01:24,645 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 97 [2021-12-22 00:01:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:24,646 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2021-12-22 00:01:24,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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) [2021-12-22 00:01:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2021-12-22 00:01:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 00:01:24,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:24,647 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:24,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 00:01:24,647 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:24,647 INFO L85 PathProgramCache]: Analyzing trace with hash 853988464, now seen corresponding path program 1 times [2021-12-22 00:01:24,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:24,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584718013] [2021-12-22 00:01:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:24,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-12-22 00:01:24,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:24,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584718013] [2021-12-22 00:01:24,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584718013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:24,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:24,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:01:24,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383993283] [2021-12-22 00:01:24,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:24,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:01:24,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:01:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:01:24,720 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:24,760 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2021-12-22 00:01:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:01:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-22 00:01:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:24,761 INFO L225 Difference]: With dead ends: 125 [2021-12-22 00:01:24,761 INFO L226 Difference]: Without dead ends: 125 [2021-12-22 00:01:24,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:01:24,762 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:24,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 39 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-22 00:01:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2021-12-22 00:01:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2021-12-22 00:01:24,766 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 99 [2021-12-22 00:01:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:24,766 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2021-12-22 00:01:24,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:24,767 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2021-12-22 00:01:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 00:01:24,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:24,767 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:24,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 00:01:24,768 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1714714637, now seen corresponding path program 1 times [2021-12-22 00:01:24,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:24,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112691735] [2021-12-22 00:01:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:24,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:25,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:25,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112691735] [2021-12-22 00:01:25,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112691735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308656516] [2021-12-22 00:01:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:25,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:25,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:25,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:01:25,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 00:01:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:25,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 00:01:25,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:25,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:26,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308656516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:26,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:26,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-22 00:01:26,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427025319] [2021-12-22 00:01:26,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:26,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-22 00:01:26,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-22 00:01:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 00:01:26,081 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:26,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:26,264 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2021-12-22 00:01:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 00:01:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 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 101 [2021-12-22 00:01:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:26,266 INFO L225 Difference]: With dead ends: 216 [2021-12-22 00:01:26,266 INFO L226 Difference]: Without dead ends: 216 [2021-12-22 00:01:26,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 00:01:26,267 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:26,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 202 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:26,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-22 00:01:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-12-22 00:01:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.0424528301886793) internal successors, (221), 215 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2021-12-22 00:01:26,286 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 101 [2021-12-22 00:01:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:26,286 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2021-12-22 00:01:26,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.0) internal successors, (196), 49 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2021-12-22 00:01:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-22 00:01:26,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:26,288 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:26,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:26,494 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 [2021-12-22 00:01:26,495 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:26,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1874420395, now seen corresponding path program 2 times [2021-12-22 00:01:26,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:26,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170258766] [2021-12-22 00:01:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:26,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:27,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:27,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170258766] [2021-12-22 00:01:27,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170258766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:27,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112452077] [2021-12-22 00:01:27,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:01:27,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:27,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:27,489 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:01:27,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 00:01:27,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 00:01:27,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:01:27,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 00:01:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2021-12-22 00:01:28,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:01:28,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112452077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:28,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:01:28,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [49] total 51 [2021-12-22 00:01:28,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855771701] [2021-12-22 00:01:28,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:28,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:01:28,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:01:28,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 00:01:28,526 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:28,529 INFO L93 Difference]: Finished difference Result 236 states and 245 transitions. [2021-12-22 00:01:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:01:28,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-12-22 00:01:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:28,530 INFO L225 Difference]: With dead ends: 236 [2021-12-22 00:01:28,530 INFO L226 Difference]: Without dead ends: 232 [2021-12-22 00:01:28,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 00:01:28,531 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:28,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-22 00:01:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-22 00:01:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2021-12-22 00:01:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 224 states have (on average 1.0580357142857142) internal successors, (237), 227 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 237 transitions. [2021-12-22 00:01:28,542 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 237 transitions. Word has length 197 [2021-12-22 00:01:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:28,543 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 237 transitions. [2021-12-22 00:01:28,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 237 transitions. [2021-12-22 00:01:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-22 00:01:28,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:28,549 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:28,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:28,766 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 [2021-12-22 00:01:28,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:28,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1875755066, now seen corresponding path program 1 times [2021-12-22 00:01:28,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:28,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135505717] [2021-12-22 00:01:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:28,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:01:29,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:29,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135505717] [2021-12-22 00:01:29,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135505717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:29,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36019533] [2021-12-22 00:01:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:29,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:29,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:29,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:01:29,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 00:01:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:29,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-22 00:01:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:01:30,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:01:32,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36019533] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:32,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:32,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-12-22 00:01:32,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128793134] [2021-12-22 00:01:32,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:32,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-22 00:01:32,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:32,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-22 00:01:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-22 00:01:32,517 INFO L87 Difference]: Start difference. First operand 228 states and 237 transitions. Second operand has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:32,939 INFO L93 Difference]: Finished difference Result 420 states and 429 transitions. [2021-12-22 00:01:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-22 00:01:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 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 197 [2021-12-22 00:01:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:32,941 INFO L225 Difference]: With dead ends: 420 [2021-12-22 00:01:32,941 INFO L226 Difference]: Without dead ends: 420 [2021-12-22 00:01:32,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-22 00:01:32,943 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 282 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:32,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 184 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:01:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-12-22 00:01:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2021-12-22 00:01:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 416 states have (on average 1.03125) internal successors, (429), 419 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 429 transitions. [2021-12-22 00:01:32,948 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 429 transitions. Word has length 197 [2021-12-22 00:01:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:32,948 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 429 transitions. [2021-12-22 00:01:32,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.979381443298969) internal successors, (386), 97 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 429 transitions. [2021-12-22 00:01:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-12-22 00:01:32,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:32,951 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:32,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-22 00:01:33,169 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 [2021-12-22 00:01:33,169 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:33,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash -385247830, now seen corresponding path program 2 times [2021-12-22 00:01:33,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:33,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532719949] [2021-12-22 00:01:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:33,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:01:36,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532719949] [2021-12-22 00:01:36,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532719949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834175564] [2021-12-22 00:01:36,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:01:36,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:36,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:36,149 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:01:36,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 00:01:36,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 00:01:36,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:01:36,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-22 00:01:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:01:37,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17581 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:01:45,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834175564] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:45,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:45,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2021-12-22 00:01:45,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624037656] [2021-12-22 00:01:45,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:45,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-12-22 00:01:45,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:45,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-12-22 00:01:45,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-12-22 00:01:45,918 INFO L87 Difference]: Start difference. First operand 420 states and 429 transitions. Second operand has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:46,953 INFO L93 Difference]: Finished difference Result 804 states and 813 transitions. [2021-12-22 00:01:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-12-22 00:01:46,954 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 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 389 [2021-12-22 00:01:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:46,963 INFO L225 Difference]: With dead ends: 804 [2021-12-22 00:01:46,963 INFO L226 Difference]: Without dead ends: 804 [2021-12-22 00:01:46,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-12-22 00:01:46,979 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 570 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:46,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 280 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 00:01:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-12-22 00:01:46,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 804. [2021-12-22 00:01:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 800 states have (on average 1.01625) internal successors, (813), 803 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 813 transitions. [2021-12-22 00:01:46,993 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 813 transitions. Word has length 389 [2021-12-22 00:01:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:46,994 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 813 transitions. [2021-12-22 00:01:46,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 3.989637305699482) internal successors, (770), 193 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 813 transitions. [2021-12-22 00:01:47,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2021-12-22 00:01:47,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:47,020 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:47,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 00:01:47,220 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 [2021-12-22 00:01:47,221 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:47,221 INFO L85 PathProgramCache]: Analyzing trace with hash 587317386, now seen corresponding path program 3 times [2021-12-22 00:01:47,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:47,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687328321] [2021-12-22 00:01:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:47,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 00:01:58,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:58,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687328321] [2021-12-22 00:01:58,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687328321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:58,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188978360] [2021-12-22 00:01:58,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 00:01:58,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:58,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:58,724 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:01:58,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 00:01:58,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 00:01:58,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:01:58,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 00:01:58,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:58,946 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:02:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 72010 trivial. 0 not checked. [2021-12-22 00:02:02,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:02:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 72013 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 72010 trivial. 0 not checked. [2021-12-22 00:02:06,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188978360] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:02:06,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:02:06,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 7, 7] total 205 [2021-12-22 00:02:06,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751143840] [2021-12-22 00:02:06,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:02:06,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2021-12-22 00:02:06,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:06,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2021-12-22 00:02:06,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18572, Invalid=23248, Unknown=0, NotChecked=0, Total=41820 [2021-12-22 00:02:06,169 INFO L87 Difference]: Start difference. First operand 804 states and 813 transitions. Second operand has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:19,790 INFO L93 Difference]: Finished difference Result 849 states and 864 transitions. [2021-12-22 00:02:19,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-12-22 00:02:19,791 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 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 773 [2021-12-22 00:02:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:19,813 INFO L225 Difference]: With dead ends: 849 [2021-12-22 00:02:19,813 INFO L226 Difference]: Without dead ends: 849 [2021-12-22 00:02:19,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1933 GetRequests, 1534 SyntacticMatches, 0 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21435 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=56818, Invalid=103582, Unknown=0, NotChecked=0, Total=160400 [2021-12-22 00:02:19,830 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 2961 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2961 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 00:02:19,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2961 Valid, 346 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 782 Invalid, 0 Unknown, 53 Unchecked, 0.7s Time] [2021-12-22 00:02:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-12-22 00:02:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 833. [2021-12-22 00:02:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 829 states have (on average 1.028950542822678) internal successors, (853), 832 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 853 transitions. [2021-12-22 00:02:19,865 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 853 transitions. Word has length 773 [2021-12-22 00:02:19,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:02:19,866 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 853 transitions. [2021-12-22 00:02:19,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 3.9170731707317072) internal successors, (803), 205 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 853 transitions. [2021-12-22 00:02:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2021-12-22 00:02:19,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:19,897 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 191, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:02:19,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 00:02:20,114 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 [2021-12-22 00:02:20,114 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:02:20,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:20,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1343914931, now seen corresponding path program 1 times [2021-12-22 00:02:20,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:20,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707361580] [2021-12-22 00:02:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:20,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 72775 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 72773 trivial. 0 not checked. [2021-12-22 00:02:20,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:20,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707361580] [2021-12-22 00:02:20,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707361580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:02:20,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:02:20,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:02:20,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437088598] [2021-12-22 00:02:20,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:02:20,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:02:20,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:02:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:02:20,580 INFO L87 Difference]: Start difference. First operand 833 states and 853 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:20,602 INFO L93 Difference]: Finished difference Result 835 states and 854 transitions. [2021-12-22 00:02:20,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:02:20,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 779 [2021-12-22 00:02:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:20,605 INFO L225 Difference]: With dead ends: 835 [2021-12-22 00:02:20,605 INFO L226 Difference]: Without dead ends: 834 [2021-12-22 00:02:20,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:02:20,606 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:02:20,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:02:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-12-22 00:02:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2021-12-22 00:02:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 830 states have (on average 1.0253012048192771) internal successors, (851), 833 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 851 transitions. [2021-12-22 00:02:20,615 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 851 transitions. Word has length 779 [2021-12-22 00:02:20,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:02:20,615 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 851 transitions. [2021-12-22 00:02:20,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 851 transitions. [2021-12-22 00:02:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2021-12-22 00:02:20,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:20,622 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 191, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:02:20,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 00:02:20,622 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:02:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:20,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1100580240, now seen corresponding path program 1 times [2021-12-22 00:02:20,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:20,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725456626] [2021-12-22 00:02:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:20,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 72777 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 72774 trivial. 0 not checked. [2021-12-22 00:02:21,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:21,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725456626] [2021-12-22 00:02:21,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725456626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:02:21,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:02:21,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:02:21,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830116936] [2021-12-22 00:02:21,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:02:21,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:02:21,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:02:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:02:21,094 INFO L87 Difference]: Start difference. First operand 834 states and 851 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:21,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:21,104 INFO L93 Difference]: Finished difference Result 841 states and 855 transitions. [2021-12-22 00:02:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:02:21,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 781 [2021-12-22 00:02:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:21,107 INFO L225 Difference]: With dead ends: 841 [2021-12-22 00:02:21,107 INFO L226 Difference]: Without dead ends: 841 [2021-12-22 00:02:21,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:02:21,109 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:02:21,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:02:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-12-22 00:02:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 829. [2021-12-22 00:02:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.0181378476420797) internal successors, (842), 828 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 842 transitions. [2021-12-22 00:02:21,116 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 842 transitions. Word has length 781 [2021-12-22 00:02:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:02:21,116 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 842 transitions. [2021-12-22 00:02:21,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 842 transitions. [2021-12-22 00:02:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2021-12-22 00:02:21,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:21,122 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 191, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:02:21,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 00:02:21,122 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:02:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash 901457319, now seen corresponding path program 1 times [2021-12-22 00:02:21,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:21,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032968832] [2021-12-22 00:02:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:21,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 72776 backedges. 0 proven. 72771 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 00:02:31,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:31,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032968832] [2021-12-22 00:02:31,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032968832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:02:31,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35011496] [2021-12-22 00:02:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:31,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:02:31,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:02:31,490 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 00:02:31,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 00:02:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2758 conjuncts, 193 conjunts are in the unsatisfiable core [2021-12-22 00:02:32,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:02:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 72776 backedges. 0 proven. 72771 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 00:02:32,716 INFO L328 TraceCheckSpWp]: Computing backward predicates...