./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:43:38,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:43:38,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:43:38,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:43:38,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:43:38,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:43:38,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:43:38,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:43:38,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:43:38,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:43:38,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:43:38,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:43:38,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:43:38,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:43:38,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:43:38,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:43:38,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:43:38,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:43:38,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:43:38,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:43:38,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:43:38,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:43:38,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:43:38,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:43:38,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:43:38,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:43:38,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:43:38,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:43:38,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:43:38,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:43:38,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:43:38,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:43:38,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:43:38,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:43:38,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:43:38,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:43:38,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:43:38,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:43:38,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:43:38,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:43:38,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:43:38,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:43:38,580 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:43:38,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:43:38,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:43:38,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:43:38,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:43:38,582 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:43:38,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:43:38,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:43:38,583 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:43:38,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:43:38,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:43:38,584 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:43:38,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:43:38,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:43:38,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:43:38,585 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:43:38,585 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:43:38,585 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:43:38,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:43:38,585 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:43:38,585 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:43:38,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:43:38,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:43:38,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:43:38,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:43:38,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:43:38,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:43:38,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:43:38,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:43:38,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:43:38,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 [2021-12-28 05:43:38,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:43:38,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:43:38,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:43:38,868 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:43:38,868 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:43:38,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2021-12-28 05:43:38,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bdfa8c2c/dc7dc8d96b434e47a035a0d8eddd5cb4/FLAGd6813f2f7 [2021-12-28 05:43:39,340 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:43:39,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2021-12-28 05:43:39,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bdfa8c2c/dc7dc8d96b434e47a035a0d8eddd5cb4/FLAGd6813f2f7 [2021-12-28 05:43:39,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bdfa8c2c/dc7dc8d96b434e47a035a0d8eddd5cb4 [2021-12-28 05:43:39,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:43:39,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:43:39,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:43:39,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:43:39,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:43:39,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ab44fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39, skipping insertion in model container [2021-12-28 05:43:39,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:43:39,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:43:39,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:43:39,630 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:43:39,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:43:39,678 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:43:39,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39 WrapperNode [2021-12-28 05:43:39,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:43:39,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:43:39,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:43:39,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:43:39,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,708 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-12-28 05:43:39,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:43:39,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:43:39,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:43:39,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:43:39,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:43:39,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:43:39,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:43:39,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:43:39,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (1/1) ... [2021-12-28 05:43:39,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:43:39,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:43:39,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 05:43:39,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 05:43:39,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 05:43:39,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 05:43:39,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 05:43:39,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:43:39,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:43:39,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:43:39,970 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:43:39,971 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:43:40,155 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:43:40,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:43:40,159 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 05:43:40,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:43:40 BoogieIcfgContainer [2021-12-28 05:43:40,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:43:40,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:43:40,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:43:40,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:43:40,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:43:39" (1/3) ... [2021-12-28 05:43:40,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c23efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:43:40, skipping insertion in model container [2021-12-28 05:43:40,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:43:39" (2/3) ... [2021-12-28 05:43:40,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c23efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:43:40, skipping insertion in model container [2021-12-28 05:43:40,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:43:40" (3/3) ... [2021-12-28 05:43:40,167 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcpy-alloca-1.i [2021-12-28 05:43:40,171 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:43:40,171 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-28 05:43:40,210 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:43:40,216 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 05:43:40,216 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-28 05:43:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:43:40,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:40,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:43:40,233 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:40,238 INFO L85 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2021-12-28 05:43:40,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:40,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073519412] [2021-12-28 05:43:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:40,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:40,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:40,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073519412] [2021-12-28 05:43:40,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073519412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:40,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:40,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:43:40,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686261887] [2021-12-28 05:43:40,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:40,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:43:40,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:40,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:43:40,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:43:40,402 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:40,465 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-12-28 05:43:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:43:40,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 05:43:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:40,472 INFO L225 Difference]: With dead ends: 34 [2021-12-28 05:43:40,472 INFO L226 Difference]: Without dead ends: 30 [2021-12-28 05:43:40,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:43:40,476 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:40,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-28 05:43:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-28 05:43:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-28 05:43:40,497 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2021-12-28 05:43:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:40,498 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-28 05:43:40,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-28 05:43:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:43:40,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:40,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:43:40,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 05:43:40,503 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2021-12-28 05:43:40,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:40,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594621429] [2021-12-28 05:43:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:40,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:40,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:40,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594621429] [2021-12-28 05:43:40,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594621429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:40,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:40,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:43:40,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306849031] [2021-12-28 05:43:40,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:40,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:43:40,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:40,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:43:40,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:43:40,537 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:40,562 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-28 05:43:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:43:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-28 05:43:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:40,563 INFO L225 Difference]: With dead ends: 29 [2021-12-28 05:43:40,563 INFO L226 Difference]: Without dead ends: 28 [2021-12-28 05:43:40,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:43:40,565 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:40,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-28 05:43:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-28 05:43:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-28 05:43:40,568 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2021-12-28 05:43:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:40,568 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-28 05:43:40,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-28 05:43:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:43:40,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:40,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:40,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 05:43:40,569 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:40,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2021-12-28 05:43:40,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:40,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273002992] [2021-12-28 05:43:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:40,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:40,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:40,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273002992] [2021-12-28 05:43:40,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273002992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:40,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:40,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:43:40,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058833210] [2021-12-28 05:43:40,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:40,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:43:40,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:43:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:43:40,636 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:40,658 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-12-28 05:43:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:43:40,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-28 05:43:40,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:40,659 INFO L225 Difference]: With dead ends: 25 [2021-12-28 05:43:40,659 INFO L226 Difference]: Without dead ends: 25 [2021-12-28 05:43:40,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:43:40,661 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:40,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-28 05:43:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-28 05:43:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-28 05:43:40,667 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 7 [2021-12-28 05:43:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:40,667 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-28 05:43:40,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-28 05:43:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:43:40,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:40,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:40,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 05:43:40,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:40,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033016, now seen corresponding path program 1 times [2021-12-28 05:43:40,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:40,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6956953] [2021-12-28 05:43:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:40,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:40,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:40,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6956953] [2021-12-28 05:43:40,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6956953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:40,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:40,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:43:40,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385595171] [2021-12-28 05:43:40,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:40,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:43:40,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:43:40,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:43:40,750 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:40,767 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-12-28 05:43:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:43:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-28 05:43:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:40,769 INFO L225 Difference]: With dead ends: 24 [2021-12-28 05:43:40,769 INFO L226 Difference]: Without dead ends: 24 [2021-12-28 05:43:40,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:43:40,770 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:40,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-28 05:43:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-28 05:43:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-28 05:43:40,773 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 7 [2021-12-28 05:43:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:40,778 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-28 05:43:40,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-28 05:43:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:43:40,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:40,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:40,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 05:43:40,780 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2021-12-28 05:43:40,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:40,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222221391] [2021-12-28 05:43:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:40,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:40,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:40,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222221391] [2021-12-28 05:43:40,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222221391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:40,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:40,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:43:40,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670952874] [2021-12-28 05:43:40,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:40,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:43:40,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:40,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:43:40,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:43:40,828 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:40,839 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-12-28 05:43:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:43:40,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-28 05:43:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:40,840 INFO L225 Difference]: With dead ends: 40 [2021-12-28 05:43:40,840 INFO L226 Difference]: Without dead ends: 40 [2021-12-28 05:43:40,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:43:40,841 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:40,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-28 05:43:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2021-12-28 05:43:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-28 05:43:40,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2021-12-28 05:43:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:40,844 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-28 05:43:40,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-28 05:43:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:43:40,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:40,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:40,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 05:43:40,845 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:40,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1805092651, now seen corresponding path program 1 times [2021-12-28 05:43:40,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:40,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560127148] [2021-12-28 05:43:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:40,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:40,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:40,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560127148] [2021-12-28 05:43:40,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560127148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:40,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:40,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:43:40,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009183221] [2021-12-28 05:43:40,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:40,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:43:40,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:43:40,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:43:40,889 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:40,933 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-12-28 05:43:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:43:40,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-28 05:43:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:40,936 INFO L225 Difference]: With dead ends: 44 [2021-12-28 05:43:40,936 INFO L226 Difference]: Without dead ends: 44 [2021-12-28 05:43:40,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:43:40,939 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:40,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-28 05:43:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2021-12-28 05:43:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-28 05:43:40,947 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 7 [2021-12-28 05:43:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:40,948 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-28 05:43:40,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-28 05:43:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:43:40,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:40,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:40,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 05:43:40,949 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:40,950 INFO L85 PathProgramCache]: Analyzing trace with hash 748014037, now seen corresponding path program 1 times [2021-12-28 05:43:40,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:40,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294053616] [2021-12-28 05:43:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:40,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:41,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:41,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294053616] [2021-12-28 05:43:41,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294053616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:41,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:41,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:43:41,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490438658] [2021-12-28 05:43:41,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:41,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:43:41,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:41,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:43:41,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:43:41,037 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:41,116 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-12-28 05:43:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:43:41,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-28 05:43:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:41,118 INFO L225 Difference]: With dead ends: 35 [2021-12-28 05:43:41,118 INFO L226 Difference]: Without dead ends: 35 [2021-12-28 05:43:41,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:43:41,123 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 85 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:41,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 48 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-28 05:43:41,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-12-28 05:43:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-28 05:43:41,130 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2021-12-28 05:43:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:41,130 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-28 05:43:41,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:41,133 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-28 05:43:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:43:41,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:41,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:41,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 05:43:41,134 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash 748014036, now seen corresponding path program 1 times [2021-12-28 05:43:41,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:41,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765438056] [2021-12-28 05:43:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:41,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:41,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765438056] [2021-12-28 05:43:41,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765438056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:41,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:41,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:43:41,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385489342] [2021-12-28 05:43:41,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:41,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:43:41,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:41,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:43:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:43:41,175 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:41,207 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-12-28 05:43:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:43:41,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-28 05:43:41,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:41,212 INFO L225 Difference]: With dead ends: 29 [2021-12-28 05:43:41,212 INFO L226 Difference]: Without dead ends: 29 [2021-12-28 05:43:41,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:43:41,213 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:41,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:41,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-28 05:43:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-28 05:43:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-28 05:43:41,226 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 10 [2021-12-28 05:43:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:41,226 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-28 05:43:41,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-28 05:43:41,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:43:41,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:41,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:41,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 05:43:41,228 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:41,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1713598655, now seen corresponding path program 1 times [2021-12-28 05:43:41,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:41,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708576007] [2021-12-28 05:43:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:41,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:41,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:41,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708576007] [2021-12-28 05:43:41,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708576007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:41,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:41,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:43:41,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678357502] [2021-12-28 05:43:41,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:41,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:43:41,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:43:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:43:41,284 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-12-28 05:43:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:41,310 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-12-28 05:43:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:43:41,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 11 [2021-12-28 05:43:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:41,311 INFO L225 Difference]: With dead ends: 28 [2021-12-28 05:43:41,311 INFO L226 Difference]: Without dead ends: 28 [2021-12-28 05:43:41,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:43:41,312 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:41,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-28 05:43:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-28 05:43:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-28 05:43:41,314 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 11 [2021-12-28 05:43:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:41,315 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-28 05:43:41,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-12-28 05:43:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-28 05:43:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:43:41,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:41,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:41,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 05:43:41,316 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1713598656, now seen corresponding path program 1 times [2021-12-28 05:43:41,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:41,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820299011] [2021-12-28 05:43:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:41,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:41,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:41,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820299011] [2021-12-28 05:43:41,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820299011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:41,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:41,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:43:41,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328936191] [2021-12-28 05:43:41,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:41,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:43:41,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:43:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:43:41,394 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-12-28 05:43:41,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:41,444 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-12-28 05:43:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:43:41,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 11 [2021-12-28 05:43:41,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:41,445 INFO L225 Difference]: With dead ends: 30 [2021-12-28 05:43:41,445 INFO L226 Difference]: Without dead ends: 30 [2021-12-28 05:43:41,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:43:41,446 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:41,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-28 05:43:41,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-12-28 05:43:41,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.32) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-28 05:43:41,448 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2021-12-28 05:43:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:41,448 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-28 05:43:41,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-12-28 05:43:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-28 05:43:41,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:43:41,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:41,449 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:41,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 05:43:41,450 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash 952918382, now seen corresponding path program 1 times [2021-12-28 05:43:41,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:41,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226641201] [2021-12-28 05:43:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:41,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:43:41,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:41,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226641201] [2021-12-28 05:43:41,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226641201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:41,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:41,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:43:41,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313086955] [2021-12-28 05:43:41,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:41,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:43:41,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:41,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:43:41,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:43:41,496 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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) [2021-12-28 05:43:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:41,514 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-12-28 05:43:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:43:41,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 11 [2021-12-28 05:43:41,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:41,515 INFO L225 Difference]: With dead ends: 49 [2021-12-28 05:43:41,515 INFO L226 Difference]: Without dead ends: 49 [2021-12-28 05:43:41,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:43:41,516 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:41,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 58 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-28 05:43:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-12-28 05:43:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-28 05:43:41,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 11 [2021-12-28 05:43:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:41,522 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-28 05:43:41,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) 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) [2021-12-28 05:43:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-28 05:43:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:43:41,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:41,524 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:41,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 05:43:41,527 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:41,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2021-12-28 05:43:41,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:41,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128526636] [2021-12-28 05:43:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:41,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:41,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:41,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128526636] [2021-12-28 05:43:41,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128526636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:43:41,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192363973] [2021-12-28 05:43:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:41,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:41,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:43:41,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:43:41,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 05:43:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:41,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 05:43:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:43:41,756 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:43:41,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:43:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:41,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:43:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:41,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192363973] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:43:41,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:43:41,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-28 05:43:41,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123885413] [2021-12-28 05:43:41,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:43:41,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 05:43:41,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 05:43:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:43:41,987 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:42,087 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-12-28 05:43:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:43:42,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 05:43:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:42,088 INFO L225 Difference]: With dead ends: 62 [2021-12-28 05:43:42,088 INFO L226 Difference]: Without dead ends: 62 [2021-12-28 05:43:42,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:43:42,089 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:42,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 91 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:43:42,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-28 05:43:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 27. [2021-12-28 05:43:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-28 05:43:42,094 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 11 [2021-12-28 05:43:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:42,095 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-28 05:43:42,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-28 05:43:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-28 05:43:42,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:42,096 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:42,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 05:43:42,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-28 05:43:42,312 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -163723683, now seen corresponding path program 1 times [2021-12-28 05:43:42,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:42,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617757521] [2021-12-28 05:43:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:42,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:42,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:42,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617757521] [2021-12-28 05:43:42,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617757521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:42,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:42,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 05:43:42,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832732739] [2021-12-28 05:43:42,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:42,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:43:42,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:43:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:43:42,418 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:42,482 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-28 05:43:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:43:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-28 05:43:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:42,483 INFO L225 Difference]: With dead ends: 39 [2021-12-28 05:43:42,483 INFO L226 Difference]: Without dead ends: 39 [2021-12-28 05:43:42,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:43:42,484 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:42,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-28 05:43:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-28 05:43:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-28 05:43:42,486 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 14 [2021-12-28 05:43:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:42,486 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-28 05:43:42,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,486 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-28 05:43:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-28 05:43:42,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:42,487 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:42,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 05:43:42,487 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash 537340895, now seen corresponding path program 1 times [2021-12-28 05:43:42,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:42,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123779435] [2021-12-28 05:43:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:42,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:42,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:42,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123779435] [2021-12-28 05:43:42,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123779435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:42,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:42,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 05:43:42,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842771611] [2021-12-28 05:43:42,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:42,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:43:42,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:43:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:43:42,555 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:42,648 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-12-28 05:43:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:43:42,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-28 05:43:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:42,649 INFO L225 Difference]: With dead ends: 53 [2021-12-28 05:43:42,649 INFO L226 Difference]: Without dead ends: 53 [2021-12-28 05:43:42,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:43:42,650 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:42,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 110 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-28 05:43:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2021-12-28 05:43:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-28 05:43:42,652 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2021-12-28 05:43:42,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:42,652 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-28 05:43:42,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,653 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-28 05:43:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-28 05:43:42,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:42,653 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:42,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 05:43:42,654 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:42,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:42,654 INFO L85 PathProgramCache]: Analyzing trace with hash 795506333, now seen corresponding path program 1 times [2021-12-28 05:43:42,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:42,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049759960] [2021-12-28 05:43:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:42,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:42,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:42,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049759960] [2021-12-28 05:43:42,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049759960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:42,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:42,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 05:43:42,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078751897] [2021-12-28 05:43:42,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:42,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:43:42,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:43:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:43:42,733 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:42,931 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-12-28 05:43:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:43:42,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-28 05:43:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:42,932 INFO L225 Difference]: With dead ends: 47 [2021-12-28 05:43:42,932 INFO L226 Difference]: Without dead ends: 47 [2021-12-28 05:43:42,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:43:42,933 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:42,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 95 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-28 05:43:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2021-12-28 05:43:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-12-28 05:43:42,935 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2021-12-28 05:43:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:42,935 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-12-28 05:43:42,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-12-28 05:43:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 05:43:42,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:42,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:42,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 05:43:42,936 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash -780511546, now seen corresponding path program 1 times [2021-12-28 05:43:42,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:42,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333642251] [2021-12-28 05:43:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:42,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:42,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:42,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333642251] [2021-12-28 05:43:42,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333642251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:43:42,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:43:42,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:43:42,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623421007] [2021-12-28 05:43:42,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:43:42,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:43:42,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:42,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:43:42,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:43:42,975 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2021-12-28 05:43:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:42,992 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-12-28 05:43:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:43:42,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 15 [2021-12-28 05:43:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:42,993 INFO L225 Difference]: With dead ends: 33 [2021-12-28 05:43:42,993 INFO L226 Difference]: Without dead ends: 21 [2021-12-28 05:43:42,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:43:42,994 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:42,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:43:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-28 05:43:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-28 05:43:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 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) [2021-12-28 05:43:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-28 05:43:42,998 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2021-12-28 05:43:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:42,998 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-28 05:43:42,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2021-12-28 05:43:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-28 05:43:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 05:43:42,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:42,999 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:42,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 05:43:42,999 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2086958086, now seen corresponding path program 1 times [2021-12-28 05:43:43,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:43,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195980604] [2021-12-28 05:43:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:43,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:43,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:43,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195980604] [2021-12-28 05:43:43,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195980604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:43:43,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064762856] [2021-12-28 05:43:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:43,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:43,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:43:43,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:43:43,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 05:43:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:43,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-28 05:43:43,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:43:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:43,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:43:43,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:43:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:43,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064762856] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:43:43,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:43:43,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-28 05:43:43,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080681782] [2021-12-28 05:43:43,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:43:43,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 05:43:43,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:43,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 05:43:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-28 05:43:43,457 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:43,612 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-28 05:43:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:43:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-28 05:43:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:43,613 INFO L225 Difference]: With dead ends: 30 [2021-12-28 05:43:43,613 INFO L226 Difference]: Without dead ends: 30 [2021-12-28 05:43:43,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-12-28 05:43:43,613 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 88 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:43,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 70 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:43:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-28 05:43:43,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-12-28 05:43:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-28 05:43:43,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-12-28 05:43:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:43,615 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-28 05:43:43,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-28 05:43:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 05:43:43,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:43,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:43,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 05:43:43,827 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,SelfDestructingSolverStorable16 [2021-12-28 05:43:43,827 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:43,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash -271191237, now seen corresponding path program 1 times [2021-12-28 05:43:43,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:43,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937656685] [2021-12-28 05:43:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:43,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:43,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:43,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937656685] [2021-12-28 05:43:43,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937656685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:43:43,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189521350] [2021-12-28 05:43:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:43,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:43,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:43:43,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:43:43,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 05:43:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:43,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-28 05:43:43,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:43:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:43:44,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-28 05:43:44,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:43:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:44,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:43:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:44,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189521350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:43:44,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:43:44,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2021-12-28 05:43:44,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332535848] [2021-12-28 05:43:44,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:43:44,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 05:43:44,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 05:43:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:43:44,346 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:44,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:44,569 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-12-28 05:43:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:43:44,570 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-28 05:43:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:44,570 INFO L225 Difference]: With dead ends: 29 [2021-12-28 05:43:44,570 INFO L226 Difference]: Without dead ends: 29 [2021-12-28 05:43:44,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-12-28 05:43:44,571 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:44,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 73 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:43:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-28 05:43:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-28 05:43:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-12-28 05:43:44,572 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2021-12-28 05:43:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:44,573 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-12-28 05:43:44,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-12-28 05:43:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-28 05:43:44,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:44,573 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:44,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:43:44,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 05:43:44,786 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:44,786 INFO L85 PathProgramCache]: Analyzing trace with hash -224662014, now seen corresponding path program 2 times [2021-12-28 05:43:44,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:44,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117881877] [2021-12-28 05:43:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:44,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:44,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:44,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117881877] [2021-12-28 05:43:44,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117881877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:43:44,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757189613] [2021-12-28 05:43:44,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:43:44,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:44,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:43:44,980 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:43:44,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 05:43:45,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:43:45,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:43:45,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-28 05:43:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:43:45,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:43:45,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:43:45,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:43:45,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:43:45,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-28 05:43:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:45,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:43:45,827 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_19| Int) (v_ArrVal_188 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_19|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_188) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_19| 1)) 0) (<= (+ 3 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_19|) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)) (not (<= |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_19| |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)))) is different from false [2021-12-28 05:43:45,844 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_19| Int) (v_ArrVal_188 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_19|)) (<= (+ 3 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_19|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_19|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_188) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_19| 1)) 0))) is different from false [2021-12-28 05:43:45,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:43:45,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:43:45,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:43:45,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:43:45,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:43:45,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:43:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-28 05:43:46,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757189613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:43:46,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:43:46,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-12-28 05:43:46,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308629962] [2021-12-28 05:43:46,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:43:46,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-28 05:43:46,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:46,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-28 05:43:46,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=950, Unknown=3, NotChecked=126, Total=1190 [2021-12-28 05:43:46,038 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:46,560 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-12-28 05:43:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 05:43:46,561 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-28 05:43:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:46,561 INFO L225 Difference]: With dead ends: 48 [2021-12-28 05:43:46,561 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 05:43:46,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=1929, Unknown=3, NotChecked=182, Total=2352 [2021-12-28 05:43:46,562 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:46,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 141 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 212 Invalid, 0 Unknown, 139 Unchecked, 0.1s Time] [2021-12-28 05:43:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 05:43:46,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-28 05:43:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-28 05:43:46,564 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 22 [2021-12-28 05:43:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:46,564 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-28 05:43:46,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-28 05:43:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-28 05:43:46,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:46,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:46,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 05:43:46,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:46,779 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:46,780 INFO L85 PathProgramCache]: Analyzing trace with hash -121211530, now seen corresponding path program 2 times [2021-12-28 05:43:46,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:46,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371608056] [2021-12-28 05:43:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:46,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:46,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:46,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371608056] [2021-12-28 05:43:46,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371608056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:43:46,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519904431] [2021-12-28 05:43:46,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:43:46,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:46,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:43:46,895 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:43:46,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 05:43:46,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:43:46,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:43:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-28 05:43:46,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:43:46,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:43:46,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-28 05:43:46,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:43:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:47,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:43:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:47,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519904431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:43:47,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:43:47,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2021-12-28 05:43:47,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841937807] [2021-12-28 05:43:47,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:43:47,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-28 05:43:47,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:47,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-28 05:43:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:43:47,471 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:47,793 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-12-28 05:43:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:43:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-28 05:43:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:47,794 INFO L225 Difference]: With dead ends: 34 [2021-12-28 05:43:47,794 INFO L226 Difference]: Without dead ends: 34 [2021-12-28 05:43:47,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-12-28 05:43:47,794 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:47,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 100 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:43:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-28 05:43:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-28 05:43:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-12-28 05:43:47,796 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2021-12-28 05:43:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:47,796 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-12-28 05:43:47,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-12-28 05:43:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:43:47,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:47,797 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:47,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-28 05:43:48,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:48,011 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1054801383, now seen corresponding path program 3 times [2021-12-28 05:43:48,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469087101] [2021-12-28 05:43:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:48,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:48,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:48,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469087101] [2021-12-28 05:43:48,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469087101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:43:48,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963240820] [2021-12-28 05:43:48,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:43:48,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:48,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:43:48,229 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:43:48,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 05:43:48,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-28 05:43:48,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:43:48,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-28 05:43:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:43:48,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:43:48,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:43:48,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:43:48,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:43:48,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:43:48,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:43:48,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-28 05:43:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:48,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:43:48,866 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_261) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|))) is different from false [2021-12-28 05:43:48,874 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 1 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-12-28 05:43:48,883 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int)) (v_ArrVal_260 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_260) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 1 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-12-28 05:43:48,894 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2021-12-28 05:43:48,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-28 05:43:48,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:43:48,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:43:48,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:43:48,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:43:48,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:43:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2021-12-28 05:43:49,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963240820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:43:49,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:43:49,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 39 [2021-12-28 05:43:49,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580691631] [2021-12-28 05:43:49,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:43:49,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-28 05:43:49,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:49,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-28 05:43:49,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1015, Unknown=5, NotChecked=340, Total=1482 [2021-12-28 05:43:49,099 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:49,406 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-12-28 05:43:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 05:43:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-28 05:43:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:49,407 INFO L225 Difference]: With dead ends: 54 [2021-12-28 05:43:49,407 INFO L226 Difference]: Without dead ends: 40 [2021-12-28 05:43:49,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 5 IntricatePredicates, 3 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1553, Unknown=5, NotChecked=420, Total=2162 [2021-12-28 05:43:49,409 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:49,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 163 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2021-12-28 05:43:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-28 05:43:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-12-28 05:43:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-12-28 05:43:49,410 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 30 [2021-12-28 05:43:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:49,410 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-12-28 05:43:49,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-12-28 05:43:49,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-28 05:43:49,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:49,411 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:49,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 05:43:49,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:49,624 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:49,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1308342596, now seen corresponding path program 4 times [2021-12-28 05:43:49,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:49,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669804499] [2021-12-28 05:43:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:49,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:49,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669804499] [2021-12-28 05:43:49,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669804499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:43:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011649133] [2021-12-28 05:43:49,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:43:49,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:49,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:43:49,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:43:49,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 05:43:49,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:43:49,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:43:49,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-28 05:43:49,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:43:49,873 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:43:49,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:43:49,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:43:50,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:43:50,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-28 05:43:50,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-28 05:43:50,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:43:50,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-28 05:43:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:50,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:43:50,997 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_307 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_41| Int)) (or (<= (+ |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_41| 4) (select |c_#length| |c_ULTIMATE.start_cstrcpy_~src~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_41|)) (not (<= |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_41| |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_307) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_41|)) 0))) is different from false [2021-12-28 05:43:51,011 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_307 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_41| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_307) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_41|)) 0) (not (<= 0 |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_41|)) (<= (+ |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_41| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post3#1.offset_41|))) is different from false [2021-12-28 05:43:51,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:43:51,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:43:51,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:43:51,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:43:51,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:43:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-28 05:43:51,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011649133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:43:51,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:43:51,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 42 [2021-12-28 05:43:51,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822956911] [2021-12-28 05:43:51,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:43:51,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-28 05:43:51,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-28 05:43:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1456, Unknown=3, NotChecked=158, Total=1806 [2021-12-28 05:43:51,645 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 43 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) [2021-12-28 05:43:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:52,240 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-12-28 05:43:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 05:43:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 43 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 34 [2021-12-28 05:43:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:52,241 INFO L225 Difference]: With dead ends: 43 [2021-12-28 05:43:52,241 INFO L226 Difference]: Without dead ends: 43 [2021-12-28 05:43:52,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=380, Invalid=2595, Unknown=3, NotChecked=214, Total=3192 [2021-12-28 05:43:52,242 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:52,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 211 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 250 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2021-12-28 05:43:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-28 05:43:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-28 05:43:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-12-28 05:43:52,244 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2021-12-28 05:43:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:52,244 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-12-28 05:43:52,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 43 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) [2021-12-28 05:43:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-12-28 05:43:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 05:43:52,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:52,245 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:52,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 05:43:52,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:52,460 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1903914801, now seen corresponding path program 3 times [2021-12-28 05:43:52,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:52,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106279555] [2021-12-28 05:43:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:52,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:52,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:52,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106279555] [2021-12-28 05:43:52,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106279555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:43:52,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664184344] [2021-12-28 05:43:52,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:43:52,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:52,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:43:52,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:43:52,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 05:43:52,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-28 05:43:52,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:43:52,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-28 05:43:52,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:43:52,704 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:43:52,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-28 05:43:52,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-28 05:43:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 05:43:53,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:43:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 05:43:53,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664184344] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:43:53,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:43:53,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2021-12-28 05:43:53,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331519416] [2021-12-28 05:43:53,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:43:53,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-28 05:43:53,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:43:53,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-28 05:43:53,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-12-28 05:43:53,507 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 31 states, 30 states have (on average 2.7) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:43:54,502 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-28 05:43:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-28 05:43:54,503 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.7) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-28 05:43:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:43:54,503 INFO L225 Difference]: With dead ends: 56 [2021-12-28 05:43:54,503 INFO L226 Difference]: Without dead ends: 56 [2021-12-28 05:43:54,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=437, Invalid=2113, Unknown=0, NotChecked=0, Total=2550 [2021-12-28 05:43:54,504 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:43:54,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 125 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 367 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2021-12-28 05:43:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-28 05:43:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-12-28 05:43:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 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) [2021-12-28 05:43:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-12-28 05:43:54,506 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 35 [2021-12-28 05:43:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:43:54,506 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-12-28 05:43:54,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.7) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:43:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-12-28 05:43:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 05:43:54,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:43:54,508 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:43:54,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 05:43:54,719 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,SelfDestructingSolverStorable22 [2021-12-28 05:43:54,719 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:43:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:43:54,720 INFO L85 PathProgramCache]: Analyzing trace with hash 187721292, now seen corresponding path program 5 times [2021-12-28 05:43:54,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:43:54,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433746261] [2021-12-28 05:43:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:43:54,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:43:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:43:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:54,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:43:54,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433746261] [2021-12-28 05:43:54,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433746261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:43:54,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83542031] [2021-12-28 05:43:54,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 05:43:54,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:43:54,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:43:54,998 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:43:54,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 05:43:55,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-28 05:43:55,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:43:55,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-28 05:43:55,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:43:55,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:43:55,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:43:55,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-28 05:43:55,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:43:55,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-28 05:43:55,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:43:55,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-28 05:43:55,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:43:55,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:43:55,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-28 05:43:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:43:55,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:44:48,354 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_55| Int) (v_ArrVal_398 Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57| Int) (v_ArrVal_396 Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59| Int) (v_ArrVal_394 Int) (|v_ULTIMATE.start_cstrcpy_~dst~0#1.base_54| Int)) (or (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_55|) (not (<= |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59| |c_ULTIMATE.start_cstrcpy_~dst~0#1.offset|)) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_cstrcpy_~dst~0#1.base_54| (store (store (store (select |c_#memory_int| |v_ULTIMATE.start_cstrcpy_~dst~0#1.base_54|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59| v_ArrVal_394) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57| v_ArrVal_396) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_55| v_ArrVal_398)) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57|))) is different from false [2021-12-28 05:44:50,423 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_55| Int) (v_ArrVal_398 Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57| Int) (v_ArrVal_396 Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59| Int) (v_ArrVal_394 Int) (|v_ULTIMATE.start_cstrcpy_~dst~0#1.base_54| Int)) (or (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_55|) (< |c_ULTIMATE.start_main_~nondetArea~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59|) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_cstrcpy_~dst~0#1.base_54| (store (store (store (select |c_#memory_int| |v_ULTIMATE.start_cstrcpy_~dst~0#1.base_54|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59| v_ArrVal_394) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57| v_ArrVal_396) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_55| v_ArrVal_398)) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57|))) is different from false [2021-12-28 05:44:50,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 778 treesize of output 766 [2021-12-28 05:44:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-28 05:44:51,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83542031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:44:51,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:44:51,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 49 [2021-12-28 05:44:51,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750455137] [2021-12-28 05:44:51,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:44:51,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-28 05:44:51,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:44:51,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-28 05:44:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1993, Unknown=30, NotChecked=182, Total=2352 [2021-12-28 05:44:51,328 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 49 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:44:53,714 WARN L838 $PredicateComparison]: unable to prove that (and (< 3 |c_ULTIMATE.start_main_~length2~0#1|) (<= |c_ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 4 |c_ULTIMATE.start_main_~length2~0#1|) (<= |c_ULTIMATE.start_main_~length2~0#1| 4) (not (= |c_ULTIMATE.start_main_~nondetString~0#1.base| |c_ULTIMATE.start_main_~nondetArea~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (<= |ULTIMATE.start_main_~length2~0#1| 4) (< 3 |ULTIMATE.start_main_~length2~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0))) (<= 0 |c_ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (forall ((|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_55| Int) (v_ArrVal_398 Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57| Int) (v_ArrVal_396 Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59| Int) (v_ArrVal_394 Int) (|v_ULTIMATE.start_cstrcpy_~dst~0#1.base_54| Int)) (or (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_55|) (< |c_ULTIMATE.start_main_~nondetArea~0#1.offset| |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59|) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_cstrcpy_~dst~0#1.base_54| (store (store (store (select |c_#memory_int| |v_ULTIMATE.start_cstrcpy_~dst~0#1.base_54|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59| v_ArrVal_394) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57| v_ArrVal_396) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_55| v_ArrVal_398)) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_59| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_57|))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false