./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/forester-heap/sll-simple-white-blue-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 b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:38:37,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:38:37,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:38:37,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:38:37,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:38:37,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:38:37,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:38:37,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:38:37,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:38:37,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:38:37,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:38:37,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:38:37,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:38:37,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:38:37,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:38:37,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:38:37,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:38:37,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:38:37,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:38:37,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:38:37,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:38:37,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:38:37,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:38:37,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:38:37,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:38:37,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:38:37,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:38:37,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:38:37,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:38:37,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:38:37,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:38:37,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:38:37,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:38:37,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:38:37,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:38:37,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:38:37,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:38:37,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:38:37,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:38:37,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:38:37,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:38:37,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 21:38:37,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:38:37,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:38:37,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:38:37,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:38:37,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:38:37,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:38:37,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:38:37,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:38:37,964 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:38:37,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:38:37,965 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:38:37,965 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:38:37,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:38:37,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:38:37,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:38:37,966 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:38:37,966 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:38:37,966 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:38:37,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:38:37,966 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:38:37,966 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:38:37,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:38:37,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:38:37,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:38:37,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:38:37,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:38:37,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:38:37,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:38:37,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 21:38:37,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 21:38:37,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:38:37,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d [2021-12-18 21:38:38,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:38:38,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:38:38,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:38:38,221 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:38:38,222 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:38:38,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-12-18 21:38:38,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29d84431a/23d2d2cbe1214f77bacb8e9f7a9de889/FLAG12bf1a5aa [2021-12-18 21:38:38,820 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:38:38,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-12-18 21:38:38,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29d84431a/23d2d2cbe1214f77bacb8e9f7a9de889/FLAG12bf1a5aa [2021-12-18 21:38:39,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29d84431a/23d2d2cbe1214f77bacb8e9f7a9de889 [2021-12-18 21:38:39,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:38:39,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:38:39,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:38:39,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:38:39,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:38:39,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37287d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39, skipping insertion in model container [2021-12-18 21:38:39,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:38:39,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:38:39,550 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-12-18 21:38:39,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:38:39,565 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:38:39,604 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-12-18 21:38:39,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:38:39,622 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:38:39,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39 WrapperNode [2021-12-18 21:38:39,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:38:39,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:38:39,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:38:39,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:38:39,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,677 INFO L137 Inliner]: procedures = 119, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 111 [2021-12-18 21:38:39,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:38:39,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:38:39,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:38:39,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:38:39,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:38:39,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:38:39,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:38:39,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:38:39,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (1/1) ... [2021-12-18 21:38:39,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:38:39,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:38:39,724 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) [2021-12-18 21:38:39,731 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 [2021-12-18 21:38:39,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 21:38:39,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 21:38:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:38:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:38:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:38:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:38:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 21:38:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 21:38:39,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:38:39,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:38:39,840 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:38:39,841 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:38:40,101 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:38:40,108 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:38:40,109 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-18 21:38:40,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:38:40 BoogieIcfgContainer [2021-12-18 21:38:40,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:38:40,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:38:40,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:38:40,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:38:40,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:38:39" (1/3) ... [2021-12-18 21:38:40,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad9eefe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:38:40, skipping insertion in model container [2021-12-18 21:38:40,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:38:39" (2/3) ... [2021-12-18 21:38:40,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad9eefe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:38:40, skipping insertion in model container [2021-12-18 21:38:40,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:38:40" (3/3) ... [2021-12-18 21:38:40,121 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2021-12-18 21:38:40,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:38:40,127 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-12-18 21:38:40,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:38:40,196 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 [2021-12-18 21:38:40,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-12-18 21:38:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 53 states have (on average 2.150943396226415) internal successors, (114), 98 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:40,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-18 21:38:40,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:40,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-18 21:38:40,223 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-18 21:38:40,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:40,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339926182] [2021-12-18 21:38:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:40,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:40,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:40,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339926182] [2021-12-18 21:38:40,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339926182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:40,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:40,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:38:40,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164460025] [2021-12-18 21:38:40,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:40,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 21:38:40,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 21:38:40,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:38:40,393 INFO L87 Difference]: Start difference. First operand has 99 states, 53 states have (on average 2.150943396226415) internal successors, (114), 98 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:40,516 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2021-12-18 21:38:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 21:38:40,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-18 21:38:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:40,523 INFO L225 Difference]: With dead ends: 127 [2021-12-18 21:38:40,523 INFO L226 Difference]: Without dead ends: 123 [2021-12-18 21:38:40,525 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 [2021-12-18 21:38:40,527 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 85 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:40,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 110 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:38:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-18 21:38:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-12-18 21:38:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 93 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-12-18 21:38:40,551 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 3 [2021-12-18 21:38:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:40,555 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-12-18 21:38:40,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-12-18 21:38:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-18 21:38:40,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:40,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-18 21:38:40,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 21:38:40,557 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-18 21:38:40,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:40,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902509432] [2021-12-18 21:38:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:40,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:40,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902509432] [2021-12-18 21:38:40,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902509432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:40,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:40,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:38:40,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643122610] [2021-12-18 21:38:40,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:40,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 21:38:40,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:40,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 21:38:40,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:38:40,600 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:40,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:40,691 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2021-12-18 21:38:40,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 21:38:40,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-18 21:38:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:40,692 INFO L225 Difference]: With dead ends: 121 [2021-12-18 21:38:40,693 INFO L226 Difference]: Without dead ends: 121 [2021-12-18 21:38:40,694 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 [2021-12-18 21:38:40,695 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 81 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:40,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 106 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:38:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-18 21:38:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2021-12-18 21:38:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 91 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-12-18 21:38:40,703 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 3 [2021-12-18 21:38:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:40,704 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-12-18 21:38:40,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-12-18 21:38:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 21:38:40,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:40,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:40,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 21:38:40,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash 59263661, now seen corresponding path program 1 times [2021-12-18 21:38:40,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:40,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147194962] [2021-12-18 21:38:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:40,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:40,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:40,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147194962] [2021-12-18 21:38:40,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147194962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:40,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:40,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:38:40,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338222365] [2021-12-18 21:38:40,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:40,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:38:40,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:40,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:38:40,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:38:40,782 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:40,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:40,889 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2021-12-18 21:38:40,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:38:40,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 21:38:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:40,892 INFO L225 Difference]: With dead ends: 95 [2021-12-18 21:38:40,892 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 21:38:40,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:38:40,902 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 123 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:40,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 40 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:38:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 21:38:40,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2021-12-18 21:38:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 86 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2021-12-18 21:38:40,916 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 8 [2021-12-18 21:38:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:40,916 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2021-12-18 21:38:40,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:40,917 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2021-12-18 21:38:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 21:38:40,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:40,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:40,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 21:38:40,932 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:40,933 INFO L85 PathProgramCache]: Analyzing trace with hash 59263662, now seen corresponding path program 1 times [2021-12-18 21:38:40,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:40,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068625623] [2021-12-18 21:38:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:40,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:41,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068625623] [2021-12-18 21:38:41,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068625623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:41,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:41,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:38:41,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727840978] [2021-12-18 21:38:41,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:41,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:38:41,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:38:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:38:41,026 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:41,196 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2021-12-18 21:38:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:38:41,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 21:38:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:41,199 INFO L225 Difference]: With dead ends: 117 [2021-12-18 21:38:41,199 INFO L226 Difference]: Without dead ends: 117 [2021-12-18 21:38:41,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:38:41,206 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 223 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:41,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 70 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:38:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-18 21:38:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2021-12-18 21:38:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.5) internal successors, (114), 101 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2021-12-18 21:38:41,220 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 8 [2021-12-18 21:38:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:41,220 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2021-12-18 21:38:41,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2021-12-18 21:38:41,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:38:41,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:41,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:41,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 21:38:41,222 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:41,222 INFO L85 PathProgramCache]: Analyzing trace with hash 467003055, now seen corresponding path program 1 times [2021-12-18 21:38:41,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:41,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052611363] [2021-12-18 21:38:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:41,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:41,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:41,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052611363] [2021-12-18 21:38:41,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052611363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:41,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:41,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:38:41,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861482067] [2021-12-18 21:38:41,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:41,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:38:41,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:41,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:38:41,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:38:41,276 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:41,407 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-12-18 21:38:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:38:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-18 21:38:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:41,408 INFO L225 Difference]: With dead ends: 103 [2021-12-18 21:38:41,408 INFO L226 Difference]: Without dead ends: 103 [2021-12-18 21:38:41,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:38:41,409 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 44 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:41,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 165 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:38:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-18 21:38:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-12-18 21:38:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.486842105263158) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2021-12-18 21:38:41,435 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 12 [2021-12-18 21:38:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:41,437 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2021-12-18 21:38:41,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2021-12-18 21:38:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:38:41,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:41,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:41,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 21:38:41,438 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:41,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash 467003056, now seen corresponding path program 1 times [2021-12-18 21:38:41,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:41,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590871601] [2021-12-18 21:38:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:41,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:41,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:41,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590871601] [2021-12-18 21:38:41,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590871601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:41,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:41,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:38:41,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800166883] [2021-12-18 21:38:41,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:41,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:38:41,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:41,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:38:41,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:38:41,535 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:41,741 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2021-12-18 21:38:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:38:41,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-18 21:38:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:41,742 INFO L225 Difference]: With dead ends: 101 [2021-12-18 21:38:41,742 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 21:38:41,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:38:41,743 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 13 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:41,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 207 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:38:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 21:38:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2021-12-18 21:38:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 71 states have (on average 1.4507042253521127) internal successors, (103), 91 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-12-18 21:38:41,746 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 12 [2021-12-18 21:38:41,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:41,746 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-12-18 21:38:41,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,747 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-12-18 21:38:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 21:38:41,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:41,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:41,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 21:38:41,747 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:41,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1831378933, now seen corresponding path program 1 times [2021-12-18 21:38:41,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:41,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658048796] [2021-12-18 21:38:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:41,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:41,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:41,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658048796] [2021-12-18 21:38:41,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658048796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:41,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:41,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:38:41,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023311066] [2021-12-18 21:38:41,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:41,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:38:41,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:41,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:38:41,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:38:41,834 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:41,935 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-12-18 21:38:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:38:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 21:38:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:41,936 INFO L225 Difference]: With dead ends: 103 [2021-12-18 21:38:41,936 INFO L226 Difference]: Without dead ends: 103 [2021-12-18 21:38:41,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:38:41,937 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 16 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:41,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 204 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:38:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-18 21:38:41,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2021-12-18 21:38:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 97 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2021-12-18 21:38:41,940 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 15 [2021-12-18 21:38:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:41,940 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2021-12-18 21:38:41,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2021-12-18 21:38:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:38:41,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:41,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:41,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 21:38:41,941 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:41,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1263266080, now seen corresponding path program 1 times [2021-12-18 21:38:41,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:41,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14969812] [2021-12-18 21:38:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:41,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:42,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14969812] [2021-12-18 21:38:42,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14969812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:38:42,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382582648] [2021-12-18 21:38:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:42,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:38:42,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:38:42,072 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) [2021-12-18 21:38:42,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 21:38:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:42,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-18 21:38:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:38:42,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:38:42,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:38:42,331 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:38:42,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-18 21:38:42,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-18 21:38:42,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:38:42,410 INFO L388 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 11 treesize of output 7 [2021-12-18 21:38:42,502 INFO L388 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 25 treesize of output 13 [2021-12-18 21:38:42,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:38:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:42,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:38:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:42,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382582648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:38:42,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:38:42,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2021-12-18 21:38:42,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944205435] [2021-12-18 21:38:42,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:38:42,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 21:38:42,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:42,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 21:38:42,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:38:42,870 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:43,576 INFO L93 Difference]: Finished difference Result 163 states and 178 transitions. [2021-12-18 21:38:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:38:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-12-18 21:38:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:43,578 INFO L225 Difference]: With dead ends: 163 [2021-12-18 21:38:43,579 INFO L226 Difference]: Without dead ends: 163 [2021-12-18 21:38:43,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-12-18 21:38:43,580 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 552 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:43,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 335 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 766 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2021-12-18 21:38:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-18 21:38:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 104. [2021-12-18 21:38:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 83 states have (on average 1.4337349397590362) internal successors, (119), 103 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2021-12-18 21:38:43,583 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 18 [2021-12-18 21:38:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:43,584 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2021-12-18 21:38:43,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2021-12-18 21:38:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:38:43,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:43,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:43,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 21:38:43,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:38:43,807 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:43,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:43,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1263266079, now seen corresponding path program 1 times [2021-12-18 21:38:43,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:43,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421318227] [2021-12-18 21:38:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:43,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:43,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:43,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421318227] [2021-12-18 21:38:43,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421318227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:38:43,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687651895] [2021-12-18 21:38:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:43,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:38:43,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:38:43,881 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) [2021-12-18 21:38:43,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 21:38:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:43,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 21:38:43,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:38:43,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:38:43,994 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 21:38:43,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 21:38:44,029 INFO L388 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 11 treesize of output 7 [2021-12-18 21:38:44,088 INFO L388 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 25 treesize of output 13 [2021-12-18 21:38:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:44,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:38:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:44,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687651895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:38:44,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:38:44,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-18 21:38:44,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117095552] [2021-12-18 21:38:44,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:38:44,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 21:38:44,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:44,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 21:38:44,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:38:44,212 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 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) [2021-12-18 21:38:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:44,436 INFO L93 Difference]: Finished difference Result 153 states and 172 transitions. [2021-12-18 21:38:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:38:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 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) Word has length 18 [2021-12-18 21:38:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:44,437 INFO L225 Difference]: With dead ends: 153 [2021-12-18 21:38:44,437 INFO L226 Difference]: Without dead ends: 153 [2021-12-18 21:38:44,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:38:44,438 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 164 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:44,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 157 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 262 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2021-12-18 21:38:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-18 21:38:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2021-12-18 21:38:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 111 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2021-12-18 21:38:44,441 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 18 [2021-12-18 21:38:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:44,441 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2021-12-18 21:38:44,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 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) [2021-12-18 21:38:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2021-12-18 21:38:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 21:38:44,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:44,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:44,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 21:38:44,658 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,SelfDestructingSolverStorable8 [2021-12-18 21:38:44,661 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash 504911936, now seen corresponding path program 1 times [2021-12-18 21:38:44,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:44,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396769325] [2021-12-18 21:38:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:44,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:44,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:44,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396769325] [2021-12-18 21:38:44,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396769325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:44,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:44,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:38:44,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097504645] [2021-12-18 21:38:44,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:44,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:38:44,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:38:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:38:44,750 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:44,953 INFO L93 Difference]: Finished difference Result 155 states and 174 transitions. [2021-12-18 21:38:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:38:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-18 21:38:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:44,955 INFO L225 Difference]: With dead ends: 155 [2021-12-18 21:38:44,955 INFO L226 Difference]: Without dead ends: 155 [2021-12-18 21:38:44,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:38:44,956 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 313 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:44,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 93 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:38:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-18 21:38:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2021-12-18 21:38:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 112 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2021-12-18 21:38:44,959 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 19 [2021-12-18 21:38:44,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:44,959 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2021-12-18 21:38:44,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2021-12-18 21:38:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 21:38:44,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:44,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:44,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 21:38:44,960 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash 504911937, now seen corresponding path program 1 times [2021-12-18 21:38:44,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:44,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405868056] [2021-12-18 21:38:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:44,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:45,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:45,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405868056] [2021-12-18 21:38:45,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405868056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:45,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:45,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:38:45,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987334194] [2021-12-18 21:38:45,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:45,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:38:45,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:38:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:38:45,061 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:45,390 INFO L93 Difference]: Finished difference Result 176 states and 194 transitions. [2021-12-18 21:38:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:38:45,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-18 21:38:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:45,391 INFO L225 Difference]: With dead ends: 176 [2021-12-18 21:38:45,391 INFO L226 Difference]: Without dead ends: 176 [2021-12-18 21:38:45,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:38:45,392 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 245 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:45,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 179 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:38:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-18 21:38:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 115. [2021-12-18 21:38:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.3894736842105264) internal successors, (132), 114 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2021-12-18 21:38:45,395 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 19 [2021-12-18 21:38:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:45,395 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2021-12-18 21:38:45,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:45,395 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2021-12-18 21:38:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 21:38:45,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:45,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:45,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 21:38:45,396 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:45,396 INFO L85 PathProgramCache]: Analyzing trace with hash -110930843, now seen corresponding path program 1 times [2021-12-18 21:38:45,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:45,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725246831] [2021-12-18 21:38:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:45,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:45,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:45,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725246831] [2021-12-18 21:38:45,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725246831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:45,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:45,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 21:38:45,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932185471] [2021-12-18 21:38:45,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:45,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 21:38:45,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 21:38:45,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:38:45,504 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:45,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:45,821 INFO L93 Difference]: Finished difference Result 204 states and 227 transitions. [2021-12-18 21:38:45,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:38:45,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 21:38:45,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:45,823 INFO L225 Difference]: With dead ends: 204 [2021-12-18 21:38:45,823 INFO L226 Difference]: Without dead ends: 204 [2021-12-18 21:38:45,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:38:45,823 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 148 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:45,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 365 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:38:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-18 21:38:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 120. [2021-12-18 21:38:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 100 states have (on average 1.38) internal successors, (138), 119 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 138 transitions. [2021-12-18 21:38:45,826 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 138 transitions. Word has length 21 [2021-12-18 21:38:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:45,826 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 138 transitions. [2021-12-18 21:38:45,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 138 transitions. [2021-12-18 21:38:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 21:38:45,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:45,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:45,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-18 21:38:45,828 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:45,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash 855282434, now seen corresponding path program 1 times [2021-12-18 21:38:45,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:45,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740449803] [2021-12-18 21:38:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:45,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:45,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:45,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740449803] [2021-12-18 21:38:45,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740449803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:45,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:45,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:38:45,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128038173] [2021-12-18 21:38:45,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:45,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:38:45,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:38:45,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:38:45,854 INFO L87 Difference]: Start difference. First operand 120 states and 138 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2021-12-18 21:38:45,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:45,912 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2021-12-18 21:38:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:38:45,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-18 21:38:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:45,913 INFO L225 Difference]: With dead ends: 139 [2021-12-18 21:38:45,913 INFO L226 Difference]: Without dead ends: 139 [2021-12-18 21:38:45,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:38:45,914 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 114 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:45,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 83 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:38:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-18 21:38:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2021-12-18 21:38:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 100 states have (on average 1.37) internal successors, (137), 119 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2021-12-18 21:38:45,917 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 22 [2021-12-18 21:38:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:45,917 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2021-12-18 21:38:45,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2021-12-18 21:38:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2021-12-18 21:38:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 21:38:45,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:45,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:45,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 21:38:45,918 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:45,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2096783466, now seen corresponding path program 2 times [2021-12-18 21:38:45,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:45,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740047965] [2021-12-18 21:38:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:45,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 21:38:45,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:45,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740047965] [2021-12-18 21:38:45,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740047965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:45,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:45,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 21:38:45,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685192161] [2021-12-18 21:38:45,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:45,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:38:45,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:38:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:38:45,986 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:46,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:46,125 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2021-12-18 21:38:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:38:46,125 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2021-12-18 21:38:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:46,126 INFO L225 Difference]: With dead ends: 145 [2021-12-18 21:38:46,126 INFO L226 Difference]: Without dead ends: 145 [2021-12-18 21:38:46,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:38:46,127 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 157 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:46,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 194 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:38:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-18 21:38:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2021-12-18 21:38:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 114 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2021-12-18 21:38:46,129 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 22 [2021-12-18 21:38:46,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:46,129 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2021-12-18 21:38:46,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2021-12-18 21:38:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 21:38:46,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:46,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:46,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 21:38:46,130 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:46,130 INFO L85 PathProgramCache]: Analyzing trace with hash 720011197, now seen corresponding path program 1 times [2021-12-18 21:38:46,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:46,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766309196] [2021-12-18 21:38:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:46,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:46,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:46,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766309196] [2021-12-18 21:38:46,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766309196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:46,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:46,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:38:46,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527122977] [2021-12-18 21:38:46,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:46,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:38:46,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:46,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:38:46,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:38:46,193 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-12-18 21:38:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:46,365 INFO L93 Difference]: Finished difference Result 164 states and 180 transitions. [2021-12-18 21:38:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:38:46,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 23 [2021-12-18 21:38:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:46,366 INFO L225 Difference]: With dead ends: 164 [2021-12-18 21:38:46,367 INFO L226 Difference]: Without dead ends: 164 [2021-12-18 21:38:46,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:38:46,367 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 142 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:46,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 234 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:38:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-18 21:38:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 118. [2021-12-18 21:38:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.346938775510204) internal successors, (132), 117 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2021-12-18 21:38:46,369 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 23 [2021-12-18 21:38:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:46,370 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2021-12-18 21:38:46,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-12-18 21:38:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2021-12-18 21:38:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 21:38:46,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:46,370 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:46,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 21:38:46,370 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash 836442201, now seen corresponding path program 1 times [2021-12-18 21:38:46,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:46,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104122413] [2021-12-18 21:38:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:46,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:46,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:46,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104122413] [2021-12-18 21:38:46,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104122413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:38:46,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456936850] [2021-12-18 21:38:46,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:46,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:38:46,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:38:46,512 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) [2021-12-18 21:38:46,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 21:38:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:46,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-18 21:38:46,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:38:46,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:38:46,665 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 21:38:46,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 21:38:46,698 INFO L388 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 11 treesize of output 7 [2021-12-18 21:38:46,814 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:38:46,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 31 treesize of output 29 [2021-12-18 21:38:46,832 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:38:46,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-18 21:38:46,961 INFO L388 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 25 treesize of output 13 [2021-12-18 21:38:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:47,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:38:47,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:47,123 INFO L388 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 20 treesize of output 21 [2021-12-18 21:38:47,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:47,130 INFO L388 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 34 treesize of output 37 [2021-12-18 21:38:47,133 INFO L388 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 9 [2021-12-18 21:38:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:49,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456936850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:38:49,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:38:49,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2021-12-18 21:38:49,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284327406] [2021-12-18 21:38:49,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:38:49,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 21:38:49,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:49,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 21:38:49,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=608, Unknown=24, NotChecked=0, Total=756 [2021-12-18 21:38:49,465 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 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) [2021-12-18 21:38:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:49,944 INFO L93 Difference]: Finished difference Result 189 states and 212 transitions. [2021-12-18 21:38:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:38:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 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) Word has length 23 [2021-12-18 21:38:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:49,945 INFO L225 Difference]: With dead ends: 189 [2021-12-18 21:38:49,945 INFO L226 Difference]: Without dead ends: 189 [2021-12-18 21:38:49,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=216, Invalid=880, Unknown=26, NotChecked=0, Total=1122 [2021-12-18 21:38:49,946 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 357 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:49,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 505 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 650 Invalid, 0 Unknown, 647 Unchecked, 0.4s Time] [2021-12-18 21:38:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-18 21:38:49,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 134. [2021-12-18 21:38:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 114 states have (on average 1.3421052631578947) internal successors, (153), 133 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2021-12-18 21:38:49,948 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 23 [2021-12-18 21:38:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:49,948 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2021-12-18 21:38:49,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 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) [2021-12-18 21:38:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2021-12-18 21:38:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 21:38:49,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:49,949 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:49,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-18 21:38:50,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:38:50,149 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:50,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:50,150 INFO L85 PathProgramCache]: Analyzing trace with hash 836442202, now seen corresponding path program 1 times [2021-12-18 21:38:50,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:50,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672159872] [2021-12-18 21:38:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:50,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:50,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:50,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672159872] [2021-12-18 21:38:50,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672159872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:38:50,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746976812] [2021-12-18 21:38:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:50,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:38:50,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:38:50,310 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) [2021-12-18 21:38:50,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 21:38:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:50,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 21:38:50,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:38:50,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:38:50,450 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:38:50,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-18 21:38:50,458 INFO L388 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 6 treesize of output 5 [2021-12-18 21:38:50,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:38:50,494 INFO L388 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 11 treesize of output 7 [2021-12-18 21:38:50,612 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:38:50,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2021-12-18 21:38:50,618 INFO L388 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 [2021-12-18 21:38:50,631 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:38:50,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 31 treesize of output 29 [2021-12-18 21:38:50,668 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:38:50,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:38:50,673 INFO L388 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 18 treesize of output 20 [2021-12-18 21:38:50,781 INFO L388 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 25 treesize of output 13 [2021-12-18 21:38:50,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:38:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:50,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:38:50,954 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_542 (Array Int Int)) (v_ArrVal_543 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_543) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_543 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_543) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2021-12-18 21:38:50,968 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_542 (Array Int Int)) (v_ArrVal_543 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_543) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_543 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_543) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2021-12-18 21:38:50,978 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_542 (Array Int Int)) (v_ArrVal_543 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_543) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_542) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) (forall ((v_ArrVal_543 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_543) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2021-12-18 21:38:50,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:50,991 INFO L388 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 18 treesize of output 19 [2021-12-18 21:38:50,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:50,997 INFO L388 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 30 treesize of output 33 [2021-12-18 21:38:51,000 INFO L388 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 9 treesize of output 7 [2021-12-18 21:38:51,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:51,031 INFO L388 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 37 treesize of output 38 [2021-12-18 21:38:51,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:51,037 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2021-12-18 21:38:51,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:38:51,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-18 21:38:51,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:38:51,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 21:38:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:51,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746976812] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:38:51,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:38:51,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2021-12-18 21:38:51,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603619549] [2021-12-18 21:38:51,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:38:51,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 21:38:51,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:51,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 21:38:51,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=720, Unknown=3, NotChecked=168, Total=992 [2021-12-18 21:38:51,154 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:52,213 INFO L93 Difference]: Finished difference Result 200 states and 225 transitions. [2021-12-18 21:38:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 21:38:52,213 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-18 21:38:52,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:52,214 INFO L225 Difference]: With dead ends: 200 [2021-12-18 21:38:52,214 INFO L226 Difference]: Without dead ends: 200 [2021-12-18 21:38:52,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=332, Invalid=1747, Unknown=3, NotChecked=270, Total=2352 [2021-12-18 21:38:52,216 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 261 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:52,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 564 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1034 Invalid, 0 Unknown, 466 Unchecked, 0.5s Time] [2021-12-18 21:38:52,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-18 21:38:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 137. [2021-12-18 21:38:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 120 states have (on average 1.3083333333333333) internal successors, (157), 136 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-12-18 21:38:52,218 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 23 [2021-12-18 21:38:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:52,219 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-12-18 21:38:52,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-12-18 21:38:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 21:38:52,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:52,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:52,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 21:38:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-18 21:38:52,435 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash 843879747, now seen corresponding path program 1 times [2021-12-18 21:38:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591248014] [2021-12-18 21:38:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:52,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:52,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:52,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591248014] [2021-12-18 21:38:52,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591248014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:52,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:52,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 21:38:52,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325753761] [2021-12-18 21:38:52,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:52,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 21:38:52,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:52,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 21:38:52,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:38:52,557 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:52,781 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2021-12-18 21:38:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:38:52,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-18 21:38:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:52,782 INFO L225 Difference]: With dead ends: 165 [2021-12-18 21:38:52,782 INFO L226 Difference]: Without dead ends: 165 [2021-12-18 21:38:52,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:38:52,783 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 70 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:52,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 245 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:38:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-18 21:38:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-12-18 21:38:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 132 states have (on average 1.2803030303030303) internal successors, (169), 148 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-12-18 21:38:52,785 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 24 [2021-12-18 21:38:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:52,786 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-12-18 21:38:52,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-12-18 21:38:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 21:38:52,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:52,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:52,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-18 21:38:52,786 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:52,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1589119206, now seen corresponding path program 1 times [2021-12-18 21:38:52,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:52,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186110253] [2021-12-18 21:38:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:52,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:52,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:52,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186110253] [2021-12-18 21:38:52,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186110253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:52,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:52,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:38:52,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788389019] [2021-12-18 21:38:52,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:52,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:38:52,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:52,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:38:52,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:38:52,818 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:52,884 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2021-12-18 21:38:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:38:52,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-18 21:38:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:52,885 INFO L225 Difference]: With dead ends: 154 [2021-12-18 21:38:52,885 INFO L226 Difference]: Without dead ends: 154 [2021-12-18 21:38:52,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:38:52,886 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:52,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 71 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:38:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-18 21:38:52,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2021-12-18 21:38:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 133 states have (on average 1.2781954887218046) internal successors, (170), 149 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-12-18 21:38:52,889 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 24 [2021-12-18 21:38:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:52,889 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-12-18 21:38:52,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-12-18 21:38:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 21:38:52,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:52,890 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:52,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-18 21:38:52,890 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:52,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:52,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1892750440, now seen corresponding path program 1 times [2021-12-18 21:38:52,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:52,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495393035] [2021-12-18 21:38:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:52,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:53,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:53,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495393035] [2021-12-18 21:38:53,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495393035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:38:53,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739858573] [2021-12-18 21:38:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:53,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:38:53,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:38:53,004 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) [2021-12-18 21:38:53,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 21:38:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:53,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-18 21:38:53,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:38:53,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:38:53,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:38:53,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:38:53,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:38:53,130 INFO L388 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 21 treesize of output 20 [2021-12-18 21:38:53,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:38:53,134 INFO L388 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 21 treesize of output 20 [2021-12-18 21:38:53,175 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:38:53,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-18 21:38:53,203 INFO L388 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 14 treesize of output 16 [2021-12-18 21:38:53,208 INFO L388 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 14 treesize of output 16 [2021-12-18 21:38:53,224 INFO L388 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 18 [2021-12-18 21:38:53,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-18 21:38:53,461 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-18 21:38:53,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 35 [2021-12-18 21:38:53,467 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:38:53,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-18 21:38:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:53,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:38:53,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:53,584 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-18 21:38:53,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:53,593 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-18 21:38:53,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:53,906 INFO L388 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 51 treesize of output 52 [2021-12-18 21:38:53,908 INFO L388 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 63 treesize of output 55 [2021-12-18 21:38:53,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:53,912 INFO L388 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 55 treesize of output 55 [2021-12-18 21:38:53,916 INFO L388 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 66 treesize of output 58 [2021-12-18 21:38:53,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:53,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 treesize of output 38 [2021-12-18 21:38:53,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:53,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 34 [2021-12-18 21:38:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:53,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739858573] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:38:53,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:38:53,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 21 [2021-12-18 21:38:53,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481570038] [2021-12-18 21:38:53,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:38:53,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 21:38:53,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 21:38:53,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=348, Unknown=16, NotChecked=0, Total=420 [2021-12-18 21:38:53,986 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:54,344 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2021-12-18 21:38:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:38:54,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-18 21:38:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:54,345 INFO L225 Difference]: With dead ends: 160 [2021-12-18 21:38:54,345 INFO L226 Difference]: Without dead ends: 160 [2021-12-18 21:38:54,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=528, Unknown=21, NotChecked=0, Total=650 [2021-12-18 21:38:54,346 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:54,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 423 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 445 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2021-12-18 21:38:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-18 21:38:54,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2021-12-18 21:38:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 151 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 172 transitions. [2021-12-18 21:38:54,348 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 172 transitions. Word has length 24 [2021-12-18 21:38:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:54,349 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 172 transitions. [2021-12-18 21:38:54,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 172 transitions. [2021-12-18 21:38:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 21:38:54,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:54,349 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:54,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 21:38:54,549 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 [2021-12-18 21:38:54,550 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1974035607, now seen corresponding path program 1 times [2021-12-18 21:38:54,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:54,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224491478] [2021-12-18 21:38:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:54,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:38:54,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:54,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224491478] [2021-12-18 21:38:54,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224491478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:38:54,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:38:54,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:38:54,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309535865] [2021-12-18 21:38:54,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:38:54,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:38:54,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:54,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:38:54,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:38:54,607 INFO L87 Difference]: Start difference. First operand 152 states and 172 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2021-12-18 21:38:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:54,755 INFO L93 Difference]: Finished difference Result 186 states and 204 transitions. [2021-12-18 21:38:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:38:54,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-18 21:38:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:54,756 INFO L225 Difference]: With dead ends: 186 [2021-12-18 21:38:54,756 INFO L226 Difference]: Without dead ends: 186 [2021-12-18 21:38:54,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:38:54,757 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 171 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:54,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 202 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:38:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-18 21:38:54,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 152. [2021-12-18 21:38:54,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 135 states have (on average 1.2592592592592593) internal successors, (170), 151 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2021-12-18 21:38:54,759 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 27 [2021-12-18 21:38:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:54,760 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2021-12-18 21:38:54,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2021-12-18 21:38:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2021-12-18 21:38:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 21:38:54,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:54,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:54,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-18 21:38:54,761 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:38:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:38:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1291386135, now seen corresponding path program 2 times [2021-12-18 21:38:54,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:38:54,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529258363] [2021-12-18 21:38:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:38:54,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:38:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:38:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:54,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:38:54,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529258363] [2021-12-18 21:38:54,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529258363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:38:54,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901993120] [2021-12-18 21:38:54,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:38:54,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:38:54,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:38:54,905 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) [2021-12-18 21:38:54,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 21:38:54,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:38:54,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:38:54,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 21:38:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:38:54,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:38:55,047 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:38:55,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-18 21:38:55,072 INFO L388 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 11 treesize of output 7 [2021-12-18 21:38:55,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:38:55,175 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:38:55,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 21 treesize of output 25 [2021-12-18 21:38:55,179 INFO L388 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 [2021-12-18 21:38:55,194 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:38:55,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 22 treesize of output 22 [2021-12-18 21:38:55,221 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 21:38:55,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-18 21:38:55,225 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-12-18 21:38:55,414 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:38:55,415 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-12-18 21:38:55,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-12-18 21:38:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:55,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:38:55,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:55,522 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2021-12-18 21:38:55,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:55,526 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-12-18 21:38:55,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:55,540 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2021-12-18 21:38:55,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:55,544 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-12-18 21:38:55,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:55,810 INFO L388 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 48 treesize of output 49 [2021-12-18 21:38:55,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:55,814 INFO L388 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 40 treesize of output 33 [2021-12-18 21:38:55,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:55,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 173 [2021-12-18 21:38:55,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:55,852 INFO L388 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 178 treesize of output 165 [2021-12-18 21:38:55,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:55,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 156 treesize of output 152 [2021-12-18 21:38:55,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:38:55,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 176 [2021-12-18 21:38:58,819 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:38:58,819 INFO L388 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 48 treesize of output 1 [2021-12-18 21:38:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:38:58,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901993120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:38:58,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:38:58,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 30 [2021-12-18 21:38:58,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930104045] [2021-12-18 21:38:58,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:38:58,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 21:38:58,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:38:58,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 21:38:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=731, Unknown=51, NotChecked=0, Total=870 [2021-12-18 21:38:58,992 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:38:59,807 INFO L93 Difference]: Finished difference Result 184 states and 201 transitions. [2021-12-18 21:38:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 21:38:59,810 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-18 21:38:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:38:59,811 INFO L225 Difference]: With dead ends: 184 [2021-12-18 21:38:59,811 INFO L226 Difference]: Without dead ends: 184 [2021-12-18 21:38:59,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=1275, Unknown=69, NotChecked=0, Total=1560 [2021-12-18 21:38:59,812 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 154 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:38:59,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 740 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1022 Invalid, 0 Unknown, 320 Unchecked, 0.5s Time] [2021-12-18 21:38:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-18 21:38:59,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 151. [2021-12-18 21:38:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 134 states have (on average 1.2462686567164178) internal successors, (167), 150 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2021-12-18 21:38:59,815 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 28 [2021-12-18 21:38:59,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:38:59,815 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2021-12-18 21:38:59,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:38:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2021-12-18 21:38:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 21:38:59,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:38:59,816 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:38:59,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:00,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:39:00,019 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1562174925, now seen corresponding path program 1 times [2021-12-18 21:39:00,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:39:00,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289009367] [2021-12-18 21:39:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:00,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:39:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:00,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:39:00,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289009367] [2021-12-18 21:39:00,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289009367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:39:00,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36566618] [2021-12-18 21:39:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:00,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:39:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:39:00,261 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) [2021-12-18 21:39:00,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 21:39:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 21:39:00,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:00,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:00,368 INFO L388 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 13 treesize of output 9 [2021-12-18 21:39:00,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:39:00,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-18 21:39:00,458 INFO L388 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 11 treesize of output 7 [2021-12-18 21:39:00,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:39:00,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:39:00,513 INFO L388 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 16 treesize of output 8 [2021-12-18 21:39:00,543 INFO L388 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 [2021-12-18 21:39:00,553 INFO L388 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 [2021-12-18 21:39:00,582 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:39:00,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-18 21:39:00,615 INFO L388 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 [2021-12-18 21:39:00,627 INFO L388 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 11 treesize of output 7 [2021-12-18 21:39:00,636 INFO L388 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 18 treesize of output 20 [2021-12-18 21:39:00,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:00,736 INFO L388 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 27 treesize of output 15 [2021-12-18 21:39:00,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:39:00,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:39:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:00,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:39:00,847 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_893 (Array Int Int))) (not (= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_893) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 4))))) is different from false [2021-12-18 21:39:00,857 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_109| Int) (v_ArrVal_893 (Array Int Int))) (or (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_109|))) (not (= 1 (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_109| v_ArrVal_893) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 4)))))) is different from false [2021-12-18 21:39:00,988 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:39:00,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 12 [2021-12-18 21:39:01,150 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_889 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_90| Int) (|v_ULTIMATE.start_main_~x~0#1.base_109| Int) (|v_ULTIMATE.start_main_#t~malloc3#1.base_18| Int) (v_ArrVal_893 (Array Int Int)) (v_ArrVal_887 Int)) (or (= |c_ULTIMATE.start_main_~head~0#1.base| |v_ULTIMATE.start_main_~x~0#1.base_109|) (not (= 0 (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc3#1.base_18|))) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_90|) (not (= 1 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~head~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_90| v_ArrVal_887)) |v_ULTIMATE.start_main_#t~malloc3#1.base_18| v_ArrVal_889) |v_ULTIMATE.start_main_~x~0#1.base_109| v_ArrVal_893) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 4)))))) is different from false [2021-12-18 21:39:01,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:39:01,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:01,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-12-18 21:39:01,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:39:01,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-12-18 21:39:01,172 INFO L388 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 8 treesize of output 4 [2021-12-18 21:39:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-18 21:39:01,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36566618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:39:01,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:39:01,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 37 [2021-12-18 21:39:01,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551082702] [2021-12-18 21:39:01,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:39:01,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 21:39:01,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:39:01,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 21:39:01,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=959, Unknown=38, NotChecked=198, Total=1332 [2021-12-18 21:39:01,196 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:02,013 INFO L93 Difference]: Finished difference Result 214 states and 232 transitions. [2021-12-18 21:39:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 21:39:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-18 21:39:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:02,015 INFO L225 Difference]: With dead ends: 214 [2021-12-18 21:39:02,015 INFO L226 Difference]: Without dead ends: 214 [2021-12-18 21:39:02,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=1894, Unknown=48, NotChecked=282, Total=2550 [2021-12-18 21:39:02,016 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 402 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 720 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:02,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 731 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 969 Invalid, 0 Unknown, 720 Unchecked, 0.5s Time] [2021-12-18 21:39:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-18 21:39:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 162. [2021-12-18 21:39:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 161 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 178 transitions. [2021-12-18 21:39:02,018 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 178 transitions. Word has length 29 [2021-12-18 21:39:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:02,018 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 178 transitions. [2021-12-18 21:39:02,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 178 transitions. [2021-12-18 21:39:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 21:39:02,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:02,019 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:02,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:02,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:39:02,220 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:02,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2055250599, now seen corresponding path program 3 times [2021-12-18 21:39:02,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:39:02,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720894714] [2021-12-18 21:39:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:02,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:39:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:02,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:39:02,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720894714] [2021-12-18 21:39:02,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720894714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:39:02,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338123308] [2021-12-18 21:39:02,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:39:02,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:39:02,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:39:02,403 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) [2021-12-18 21:39:02,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 21:39:02,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 21:39:02,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:39:02,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 21:39:02,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:02,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:02,591 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:39:02,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-18 21:39:02,621 INFO L388 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 11 treesize of output 7 [2021-12-18 21:39:02,710 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:39:02,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 22 treesize of output 22 [2021-12-18 21:39:02,728 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:39:02,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 22 treesize of output 22 [2021-12-18 21:39:02,750 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:39:02,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-18 21:39:02,785 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-18 21:39:02,785 INFO L388 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 1 case distinctions, treesize of input 27 treesize of output 22 [2021-12-18 21:39:02,897 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-18 21:39:02,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 49 [2021-12-18 21:39:02,906 INFO L388 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 12 treesize of output 8 [2021-12-18 21:39:02,960 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-18 21:39:02,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2021-12-18 21:39:02,963 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-18 21:39:02,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:39:02,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-18 21:39:02,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226660151] [2021-12-18 21:39:02,963 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 21:39:02,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 21:39:02,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:39:02,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 21:39:02,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-12-18 21:39:02,964 INFO L87 Difference]: Start difference. First operand 162 states and 178 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 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) [2021-12-18 21:39:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 21:39:02,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-12-18 21:39:02,966 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:02,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:39:02,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:03,183 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,SelfDestructingSolverStorable23 [2021-12-18 21:39:03,183 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3c8d371b at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-18 21:39:03,186 INFO L158 Benchmark]: Toolchain (without parser) took 23884.44ms. Allocated memory was 104.9MB in the beginning and 262.1MB in the end (delta: 157.3MB). Free memory was 75.4MB in the beginning and 125.0MB in the end (delta: -49.5MB). Peak memory consumption was 107.3MB. Max. memory is 16.1GB. [2021-12-18 21:39:03,186 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory was 62.7MB in the beginning and 62.6MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:39:03,187 INFO L158 Benchmark]: CACSL2BoogieTranslator took 318.40ms. Allocated memory is still 104.9MB. Free memory was 75.2MB in the beginning and 73.9MB in the end (delta: 1.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 21:39:03,187 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.97ms. Allocated memory is still 104.9MB. Free memory was 73.6MB in the beginning and 71.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:39:03,187 INFO L158 Benchmark]: Boogie Preprocessor took 24.89ms. Allocated memory is still 104.9MB. Free memory was 71.8MB in the beginning and 70.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:39:03,187 INFO L158 Benchmark]: RCFGBuilder took 408.02ms. Allocated memory is still 104.9MB. Free memory was 70.1MB in the beginning and 53.0MB in the end (delta: 17.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-18 21:39:03,187 INFO L158 Benchmark]: TraceAbstraction took 23071.67ms. Allocated memory was 104.9MB in the beginning and 262.1MB in the end (delta: 157.3MB). Free memory was 52.6MB in the beginning and 125.0MB in the end (delta: -72.4MB). Peak memory consumption was 86.7MB. Max. memory is 16.1GB. [2021-12-18 21:39:03,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 104.9MB. Free memory was 62.7MB in the beginning and 62.6MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 318.40ms. Allocated memory is still 104.9MB. Free memory was 75.2MB in the beginning and 73.9MB in the end (delta: 1.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.97ms. Allocated memory is still 104.9MB. Free memory was 73.6MB in the beginning and 71.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.89ms. Allocated memory is still 104.9MB. Free memory was 71.8MB in the beginning and 70.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 408.02ms. Allocated memory is still 104.9MB. Free memory was 70.1MB in the beginning and 53.0MB in the end (delta: 17.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 23071.67ms. Allocated memory was 104.9MB in the beginning and 262.1MB in the end (delta: 157.3MB). Free memory was 52.6MB in the beginning and 125.0MB in the end (delta: -72.4MB). Peak memory consumption was 86.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3c8d371b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3c8d371b: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-18 21:39:03,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/forester-heap/sll-simple-white-blue-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:39:04,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:39:04,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:39:05,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:39:05,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:39:05,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:39:05,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:39:05,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:39:05,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:39:05,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:39:05,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:39:05,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:39:05,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:39:05,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:39:05,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:39:05,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:39:05,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:39:05,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:39:05,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:39:05,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:39:05,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:39:05,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:39:05,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:39:05,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:39:05,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:39:05,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:39:05,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:39:05,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:39:05,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:39:05,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:39:05,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:39:05,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:39:05,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:39:05,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:39:05,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:39:05,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:39:05,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:39:05,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:39:05,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:39:05,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:39:05,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:39:05,068 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 21:39:05,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:39:05,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:39:05,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:39:05,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:39:05,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:39:05,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:39:05,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:39:05,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:39:05,100 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:39:05,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:39:05,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:39:05,101 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:39:05,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:39:05,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:39:05,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:39:05,102 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:39:05,102 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:39:05,102 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:39:05,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:39:05,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:39:05,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 21:39:05,103 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 21:39:05,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:39:05,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:39:05,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:39:05,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:39:05,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:39:05,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:39:05,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:39:05,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:39:05,112 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 21:39:05,112 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 21:39:05,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:39:05,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 21:39:05,113 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d [2021-12-18 21:39:05,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:39:05,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:39:05,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:39:05,376 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:39:05,376 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:39:05,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-12-18 21:39:05,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0cef725d/3248cbfc2dfb4aff86a44dc5470daa06/FLAG7a9f063f8 [2021-12-18 21:39:05,862 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:39:05,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-12-18 21:39:05,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0cef725d/3248cbfc2dfb4aff86a44dc5470daa06/FLAG7a9f063f8 [2021-12-18 21:39:06,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0cef725d/3248cbfc2dfb4aff86a44dc5470daa06 [2021-12-18 21:39:06,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:39:06,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:39:06,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:39:06,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:39:06,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:39:06,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d904f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06, skipping insertion in model container [2021-12-18 21:39:06,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:39:06,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:39:06,494 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-12-18 21:39:06,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:39:06,512 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:39:06,543 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-12-18 21:39:06,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:39:06,564 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:39:06,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06 WrapperNode [2021-12-18 21:39:06,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:39:06,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:39:06,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:39:06,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:39:06,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,604 INFO L137 Inliner]: procedures = 122, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 109 [2021-12-18 21:39:06,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:39:06,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:39:06,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:39:06,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:39:06,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:39:06,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:39:06,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:39:06,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:39:06,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (1/1) ... [2021-12-18 21:39:06,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:39:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:39:06,669 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) [2021-12-18 21:39:06,674 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 [2021-12-18 21:39:06,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-18 21:39:06,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:39:06,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:39:06,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:39:06,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:39:06,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 21:39:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-18 21:39:06,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-18 21:39:06,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:39:06,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:39:06,818 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:39:06,819 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:39:07,186 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:39:07,191 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:39:07,191 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-18 21:39:07,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:39:07 BoogieIcfgContainer [2021-12-18 21:39:07,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:39:07,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:39:07,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:39:07,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:39:07,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:39:06" (1/3) ... [2021-12-18 21:39:07,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@996d72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:39:07, skipping insertion in model container [2021-12-18 21:39:07,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:39:06" (2/3) ... [2021-12-18 21:39:07,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@996d72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:39:07, skipping insertion in model container [2021-12-18 21:39:07,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:39:07" (3/3) ... [2021-12-18 21:39:07,197 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2021-12-18 21:39:07,201 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:39:07,201 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-12-18 21:39:07,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:39:07,245 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 [2021-12-18 21:39:07,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-12-18 21:39:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 51 states have (on average 2.196078431372549) internal successors, (112), 96 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-18 21:39:07,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:07,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-18 21:39:07,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-18 21:39:07,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:07,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242105743] [2021-12-18 21:39:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:07,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:07,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:07,283 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:07,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 21:39:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:39:07,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:07,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:07,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:07,426 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:07,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242105743] [2021-12-18 21:39:07,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242105743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:07,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:07,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:39:07,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656500436] [2021-12-18 21:39:07,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:07,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 21:39:07,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:07,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 21:39:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:39:07,451 INFO L87 Difference]: Start difference. First operand has 97 states, 51 states have (on average 2.196078431372549) internal successors, (112), 96 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:07,632 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2021-12-18 21:39:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 21:39:07,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-18 21:39:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:07,639 INFO L225 Difference]: With dead ends: 125 [2021-12-18 21:39:07,639 INFO L226 Difference]: Without dead ends: 121 [2021-12-18 21:39:07,640 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 [2021-12-18 21:39:07,642 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 83 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:07,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 108 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:39:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-18 21:39:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2021-12-18 21:39:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 49 states have (on average 2.0) internal successors, (98), 91 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-12-18 21:39:07,665 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 3 [2021-12-18 21:39:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:07,665 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-12-18 21:39:07,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-12-18 21:39:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-18 21:39:07,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:07,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-18 21:39:07,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:07,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:07,874 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:07,875 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-18 21:39:07,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:07,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66598285] [2021-12-18 21:39:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:07,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:07,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:07,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:07,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 21:39:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:07,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:39:07,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:07,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:07,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:07,950 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:07,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66598285] [2021-12-18 21:39:07,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66598285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:07,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:07,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:39:07,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64572312] [2021-12-18 21:39:07,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:07,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 21:39:07,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:07,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 21:39:07,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:39:07,953 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:08,178 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2021-12-18 21:39:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 21:39:08,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-18 21:39:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:08,180 INFO L225 Difference]: With dead ends: 119 [2021-12-18 21:39:08,180 INFO L226 Difference]: Without dead ends: 119 [2021-12-18 21:39:08,180 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 [2021-12-18 21:39:08,181 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 79 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:08,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 104 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:39:08,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-18 21:39:08,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2021-12-18 21:39:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-12-18 21:39:08,186 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 3 [2021-12-18 21:39:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:08,186 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-12-18 21:39:08,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-12-18 21:39:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 21:39:08,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:08,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:08,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:08,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:08,394 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1803027173, now seen corresponding path program 1 times [2021-12-18 21:39:08,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:08,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708036878] [2021-12-18 21:39:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:08,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:08,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:08,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:08,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 21:39:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 21:39:08,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:08,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:08,540 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:39:08,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 15 treesize of output 20 [2021-12-18 21:39:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:08,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:08,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:08,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708036878] [2021-12-18 21:39:08,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708036878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:08,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:08,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:39:08,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502864138] [2021-12-18 21:39:08,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:08,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:39:08,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:39:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:39:08,559 INFO L87 Difference]: Start difference. First operand 90 states and 96 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) [2021-12-18 21:39:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:08,780 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2021-12-18 21:39:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:39:08,781 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 [2021-12-18 21:39:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:08,781 INFO L225 Difference]: With dead ends: 93 [2021-12-18 21:39:08,782 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 21:39:08,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:39:08,783 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 120 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:08,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 38 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:39:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 21:39:08,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-12-18 21:39:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 84 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2021-12-18 21:39:08,795 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 7 [2021-12-18 21:39:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:08,795 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2021-12-18 21:39:08,796 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) [2021-12-18 21:39:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2021-12-18 21:39:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 21:39:08,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:08,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:08,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:09,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:09,005 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:09,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1803027174, now seen corresponding path program 1 times [2021-12-18 21:39:09,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:09,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51505840] [2021-12-18 21:39:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:09,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:09,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:09,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:09,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 21:39:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:39:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:09,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:09,171 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:39:09,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-18 21:39:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:09,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:09,182 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:09,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51505840] [2021-12-18 21:39:09,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51505840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:09,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:09,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:39:09,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800819265] [2021-12-18 21:39:09,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:09,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:39:09,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:09,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:39:09,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:39:09,185 INFO L87 Difference]: Start difference. First operand 85 states and 97 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) [2021-12-18 21:39:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:09,443 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-12-18 21:39:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:39:09,444 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 [2021-12-18 21:39:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:09,444 INFO L225 Difference]: With dead ends: 113 [2021-12-18 21:39:09,444 INFO L226 Difference]: Without dead ends: 113 [2021-12-18 21:39:09,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:39:09,445 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 121 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:09,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 53 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:39:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-18 21:39:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2021-12-18 21:39:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 98 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-12-18 21:39:09,449 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 7 [2021-12-18 21:39:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:09,450 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-12-18 21:39:09,450 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) [2021-12-18 21:39:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-12-18 21:39:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:39:09,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:09,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:09,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:09,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:09,659 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:09,660 INFO L85 PathProgramCache]: Analyzing trace with hash 406735527, now seen corresponding path program 1 times [2021-12-18 21:39:09,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:09,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039179413] [2021-12-18 21:39:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:09,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:09,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:09,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:09,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 21:39:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:09,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:39:09,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:09,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:09,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:09,785 INFO L388 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 20 treesize of output 12 [2021-12-18 21:39:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:09,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:09,812 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:09,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039179413] [2021-12-18 21:39:09,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039179413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:09,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:09,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:39:09,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316936065] [2021-12-18 21:39:09,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:09,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:39:09,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:09,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:39:09,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:39:09,814 INFO L87 Difference]: Start difference. First operand 99 states and 111 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) [2021-12-18 21:39:10,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:10,196 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2021-12-18 21:39:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:39:10,197 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 [2021-12-18 21:39:10,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:10,197 INFO L225 Difference]: With dead ends: 99 [2021-12-18 21:39:10,197 INFO L226 Difference]: Without dead ends: 99 [2021-12-18 21:39:10,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:39:10,198 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 42 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:10,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 147 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:39:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-18 21:39:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-12-18 21:39:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.5068493150684932) internal successors, (110), 97 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2021-12-18 21:39:10,202 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 11 [2021-12-18 21:39:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:10,203 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2021-12-18 21:39:10,203 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) [2021-12-18 21:39:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2021-12-18 21:39:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:39:10,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:10,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:10,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-18 21:39:10,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:10,411 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:10,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:10,412 INFO L85 PathProgramCache]: Analyzing trace with hash 406735528, now seen corresponding path program 1 times [2021-12-18 21:39:10,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:10,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908805931] [2021-12-18 21:39:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:10,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:10,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:10,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:10,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 21:39:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 21:39:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:10,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:10,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:10,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:10,554 INFO L388 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 17 treesize of output 9 [2021-12-18 21:39:10,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:39:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:10,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:10,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:10,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908805931] [2021-12-18 21:39:10,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908805931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:10,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:10,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:39:10,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563408138] [2021-12-18 21:39:10,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:10,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:39:10,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:10,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:39:10,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:39:10,586 INFO L87 Difference]: Start difference. First operand 98 states and 110 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) [2021-12-18 21:39:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:10,998 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-12-18 21:39:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 21:39:10,999 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 [2021-12-18 21:39:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:10,999 INFO L225 Difference]: With dead ends: 97 [2021-12-18 21:39:10,999 INFO L226 Difference]: Without dead ends: 97 [2021-12-18 21:39:11,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:39:11,000 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 11 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:11,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 189 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:39:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-18 21:39:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2021-12-18 21:39:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.463768115942029) internal successors, (101), 89 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2021-12-18 21:39:11,004 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 11 [2021-12-18 21:39:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:11,004 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2021-12-18 21:39:11,004 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) [2021-12-18 21:39:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2021-12-18 21:39:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 21:39:11,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:11,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:11,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:11,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:11,205 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash 813754491, now seen corresponding path program 1 times [2021-12-18 21:39:11,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:11,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452306725] [2021-12-18 21:39:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:11,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:11,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:11,207 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:11,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 21:39:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 21:39:11,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:11,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:11,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:11,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:39:11,308 INFO L388 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 21 treesize of output 20 [2021-12-18 21:39:11,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:39:11,314 INFO L388 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 21 treesize of output 20 [2021-12-18 21:39:11,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:39:11,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:39:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:11,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:11,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:11,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452306725] [2021-12-18 21:39:11,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452306725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:11,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:11,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:39:11,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882475616] [2021-12-18 21:39:11,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:11,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:39:11,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:39:11,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:39:11,395 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:11,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:11,688 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2021-12-18 21:39:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:39:11,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 21:39:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:11,689 INFO L225 Difference]: With dead ends: 129 [2021-12-18 21:39:11,689 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 21:39:11,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:39:11,690 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 76 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:11,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 307 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:39:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 21:39:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2021-12-18 21:39:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 73 states have (on average 1.4657534246575343) internal successors, (107), 93 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2021-12-18 21:39:11,694 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 13 [2021-12-18 21:39:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:11,694 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2021-12-18 21:39:11,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2021-12-18 21:39:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:39:11,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:11,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:11,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-18 21:39:11,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:11,902 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:11,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:11,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1626848531, now seen corresponding path program 1 times [2021-12-18 21:39:11,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:11,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354308717] [2021-12-18 21:39:11,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:11,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:11,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:11,904 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:11,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 21:39:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:11,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 21:39:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:11,993 INFO L388 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 13 treesize of output 9 [2021-12-18 21:39:12,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:39:12,009 INFO L388 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 21 treesize of output 20 [2021-12-18 21:39:12,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:39:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:12,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:12,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:12,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354308717] [2021-12-18 21:39:12,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354308717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:12,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:12,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:39:12,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526416817] [2021-12-18 21:39:12,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:12,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:39:12,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:12,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:39:12,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:39:12,047 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:12,263 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-12-18 21:39:12,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:39:12,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-18 21:39:12,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:12,264 INFO L225 Difference]: With dead ends: 124 [2021-12-18 21:39:12,264 INFO L226 Difference]: Without dead ends: 124 [2021-12-18 21:39:12,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:39:12,265 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 43 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:12,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 195 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:39:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-18 21:39:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2021-12-18 21:39:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 96 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2021-12-18 21:39:12,268 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 16 [2021-12-18 21:39:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:12,269 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2021-12-18 21:39:12,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2021-12-18 21:39:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:39:12,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:12,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:12,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-18 21:39:12,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:12,477 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:12,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:12,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1105672240, now seen corresponding path program 1 times [2021-12-18 21:39:12,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:12,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139651318] [2021-12-18 21:39:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:12,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:12,479 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:12,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 21:39:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:12,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 21:39:12,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:12,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:12,604 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:39:12,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 15 treesize of output 20 [2021-12-18 21:39:12,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:12,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-18 21:39:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:12,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:12,698 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:12,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139651318] [2021-12-18 21:39:12,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139651318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:12,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:12,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:39:12,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084824608] [2021-12-18 21:39:12,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:12,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:39:12,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:12,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:39:12,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:39:12,699 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:13,196 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-12-18 21:39:13,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:39:13,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 21:39:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:13,197 INFO L225 Difference]: With dead ends: 128 [2021-12-18 21:39:13,197 INFO L226 Difference]: Without dead ends: 128 [2021-12-18 21:39:13,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-18 21:39:13,198 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 105 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:13,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 97 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:39:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-18 21:39:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 101. [2021-12-18 21:39:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.45) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2021-12-18 21:39:13,200 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 17 [2021-12-18 21:39:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:13,201 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2021-12-18 21:39:13,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2021-12-18 21:39:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:39:13,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:13,201 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:13,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-18 21:39:13,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:13,409 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1105672241, now seen corresponding path program 1 times [2021-12-18 21:39:13,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:13,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179736342] [2021-12-18 21:39:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:13,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:13,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:13,410 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:13,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 21:39:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 21:39:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:13,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:13,556 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:39:13,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-18 21:39:13,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:13,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:13,663 INFO L388 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 17 treesize of output 9 [2021-12-18 21:39:13,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:39:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:13,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:13,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:13,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179736342] [2021-12-18 21:39:13,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179736342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:13,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:13,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:39:13,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097551937] [2021-12-18 21:39:13,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:13,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 21:39:13,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 21:39:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:39:13,714 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:14,310 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2021-12-18 21:39:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:39:14,311 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 21:39:14,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:14,311 INFO L225 Difference]: With dead ends: 148 [2021-12-18 21:39:14,311 INFO L226 Difference]: Without dead ends: 148 [2021-12-18 21:39:14,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-18 21:39:14,312 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 240 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:14,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 132 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 21:39:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-18 21:39:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 103. [2021-12-18 21:39:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 102 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2021-12-18 21:39:14,315 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 17 [2021-12-18 21:39:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:14,315 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2021-12-18 21:39:14,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2021-12-18 21:39:14,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 21:39:14,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:14,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:14,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:14,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:14,523 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:14,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:14,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1694103573, now seen corresponding path program 1 times [2021-12-18 21:39:14,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:14,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268972657] [2021-12-18 21:39:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:14,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:14,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:14,525 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:14,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 21:39:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:14,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 21:39:14,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:14,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:14,621 INFO L388 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 13 treesize of output 9 [2021-12-18 21:39:14,651 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:39:14,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 14 [2021-12-18 21:39:14,669 INFO L388 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 [2021-12-18 21:39:14,692 INFO L388 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 11 treesize of output 7 [2021-12-18 21:39:14,714 INFO L388 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 20 treesize of output 22 [2021-12-18 21:39:14,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:14,806 INFO L388 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 33 treesize of output 21 [2021-12-18 21:39:14,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-18 21:39:14,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 21:39:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:14,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:14,869 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268972657] [2021-12-18 21:39:14,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268972657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:14,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:14,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 21:39:14,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683982270] [2021-12-18 21:39:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:14,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:39:14,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:39:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:39:14,870 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:15,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:15,721 INFO L93 Difference]: Finished difference Result 163 states and 181 transitions. [2021-12-18 21:39:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 21:39:15,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-18 21:39:15,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:15,722 INFO L225 Difference]: With dead ends: 163 [2021-12-18 21:39:15,722 INFO L226 Difference]: Without dead ends: 163 [2021-12-18 21:39:15,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:39:15,722 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 108 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:15,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 282 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 21:39:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-18 21:39:15,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-12-18 21:39:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 113 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2021-12-18 21:39:15,725 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 19 [2021-12-18 21:39:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:15,725 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2021-12-18 21:39:15,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2021-12-18 21:39:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 21:39:15,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:15,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:15,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:15,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:15,931 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:15,932 INFO L85 PathProgramCache]: Analyzing trace with hash 976774480, now seen corresponding path program 1 times [2021-12-18 21:39:15,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:15,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991207817] [2021-12-18 21:39:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:15,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:15,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:15,933 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:15,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 21:39:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:15,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 21:39:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:16,021 INFO L388 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 11 treesize of output 7 [2021-12-18 21:39:16,052 INFO L388 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 16 treesize of output 8 [2021-12-18 21:39:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:16,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:16,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:16,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991207817] [2021-12-18 21:39:16,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991207817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:16,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:16,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:39:16,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313741972] [2021-12-18 21:39:16,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:16,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:39:16,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:16,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:39:16,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:39:16,072 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:16,405 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2021-12-18 21:39:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:39:16,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-18 21:39:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:16,406 INFO L225 Difference]: With dead ends: 152 [2021-12-18 21:39:16,406 INFO L226 Difference]: Without dead ends: 152 [2021-12-18 21:39:16,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-18 21:39:16,406 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 182 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:16,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 189 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:39:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-18 21:39:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2021-12-18 21:39:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.3655913978494623) internal successors, (127), 113 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2021-12-18 21:39:16,409 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 20 [2021-12-18 21:39:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:16,409 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2021-12-18 21:39:16,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2021-12-18 21:39:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 21:39:16,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:16,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:16,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-18 21:39:16,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:16,612 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:16,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:16,612 INFO L85 PathProgramCache]: Analyzing trace with hash -531988400, now seen corresponding path program 1 times [2021-12-18 21:39:16,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:16,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331331124] [2021-12-18 21:39:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:16,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:16,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:16,614 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:16,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 21:39:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:16,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 21:39:16,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:16,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:16,766 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:39:16,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:39:16,802 INFO L388 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 11 treesize of output 7 [2021-12-18 21:39:16,915 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:39:16,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 34 treesize of output 32 [2021-12-18 21:39:16,934 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:39:16,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2021-12-18 21:39:17,006 INFO L388 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 28 treesize of output 16 [2021-12-18 21:39:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:17,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:39:17,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:17,272 INFO L388 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 22 treesize of output 23 [2021-12-18 21:39:17,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:17,282 INFO L388 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 38 treesize of output 41 [2021-12-18 21:39:17,286 INFO L388 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 13 treesize of output 11 [2021-12-18 21:39:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:34,466 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:34,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331331124] [2021-12-18 21:39:34,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331331124] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:39:34,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:39:34,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-18 21:39:34,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999397023] [2021-12-18 21:39:34,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:39:34,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 21:39:34,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 21:39:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=368, Unknown=9, NotChecked=0, Total=462 [2021-12-18 21:39:34,468 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 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) [2021-12-18 21:39:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:35,449 INFO L93 Difference]: Finished difference Result 196 states and 222 transitions. [2021-12-18 21:39:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 21:39:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 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) Word has length 20 [2021-12-18 21:39:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:35,450 INFO L225 Difference]: With dead ends: 196 [2021-12-18 21:39:35,450 INFO L226 Difference]: Without dead ends: 196 [2021-12-18 21:39:35,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=165, Invalid=582, Unknown=9, NotChecked=0, Total=756 [2021-12-18 21:39:35,451 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 195 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 542 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:35,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 344 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 538 Invalid, 0 Unknown, 542 Unchecked, 0.8s Time] [2021-12-18 21:39:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-18 21:39:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 128. [2021-12-18 21:39:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 107 states have (on average 1.3644859813084111) internal successors, (146), 127 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2021-12-18 21:39:35,454 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 20 [2021-12-18 21:39:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:35,454 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2021-12-18 21:39:35,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 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) [2021-12-18 21:39:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2021-12-18 21:39:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 21:39:35,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:35,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:35,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:35,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:35,665 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:35,665 INFO L85 PathProgramCache]: Analyzing trace with hash -531988399, now seen corresponding path program 1 times [2021-12-18 21:39:35,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:35,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190896277] [2021-12-18 21:39:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:35,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:35,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:35,667 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:35,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 21:39:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 21:39:35,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:35,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:39:35,851 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:39:35,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 14 [2021-12-18 21:39:35,859 INFO L388 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 6 treesize of output 5 [2021-12-18 21:39:35,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:35,893 INFO L388 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 11 treesize of output 7 [2021-12-18 21:39:36,002 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:39:36,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 31 treesize of output 29 [2021-12-18 21:39:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:39:36,012 INFO L388 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 14 treesize of output 16 [2021-12-18 21:39:36,040 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:39:36,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:39:36,044 INFO L388 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 18 treesize of output 20 [2021-12-18 21:39:36,140 INFO L388 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 25 treesize of output 13 [2021-12-18 21:39:36,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:39:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:36,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:39:36,472 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_365 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_364 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_364) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_365) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_364 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_364) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32)))))) is different from false [2021-12-18 21:39:36,506 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_364 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_364) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_365 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_364 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_364) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_365) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2021-12-18 21:39:36,529 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_365 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_364 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_364) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_365) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) (forall ((v_ArrVal_364 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_364) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule .cse1 (bvadd .cse1 (_ bv4 32)))))) is different from false [2021-12-18 21:39:36,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:36,552 INFO L388 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 37 treesize of output 38 [2021-12-18 21:39:36,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:36,557 INFO L388 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 29 treesize of output 30 [2021-12-18 21:39:36,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:36,568 INFO L388 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 52 treesize of output 55 [2021-12-18 21:39:36,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:36,585 INFO L388 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 82 treesize of output 81 [2021-12-18 21:39:36,592 INFO L388 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 34 treesize of output 30 [2021-12-18 21:39:36,596 INFO L388 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 62 treesize of output 58 [2021-12-18 21:39:37,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:37,002 INFO L388 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 35 treesize of output 28 [2021-12-18 21:39:37,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:37,019 INFO L388 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 40 treesize of output 39 [2021-12-18 21:39:37,027 INFO L388 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 13 treesize of output 9 [2021-12-18 21:39:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:37,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:37,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190896277] [2021-12-18 21:39:37,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190896277] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:39:37,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:39:37,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-18 21:39:37,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800266938] [2021-12-18 21:39:37,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:39:37,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 21:39:37,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 21:39:37,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=292, Unknown=3, NotChecked=108, Total=462 [2021-12-18 21:39:37,593 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 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) [2021-12-18 21:39:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:40,091 INFO L93 Difference]: Finished difference Result 205 states and 229 transitions. [2021-12-18 21:39:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 21:39:40,091 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 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) Word has length 20 [2021-12-18 21:39:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:40,092 INFO L225 Difference]: With dead ends: 205 [2021-12-18 21:39:40,092 INFO L226 Difference]: Without dead ends: 205 [2021-12-18 21:39:40,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=209, Invalid=856, Unknown=3, NotChecked=192, Total=1260 [2021-12-18 21:39:40,093 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 191 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 543 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:40,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 465 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 816 Invalid, 0 Unknown, 543 Unchecked, 1.7s Time] [2021-12-18 21:39:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-18 21:39:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2021-12-18 21:39:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 104 states have (on average 1.3365384615384615) internal successors, (139), 121 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2021-12-18 21:39:40,097 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 20 [2021-12-18 21:39:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:40,097 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2021-12-18 21:39:40,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 22 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) [2021-12-18 21:39:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2021-12-18 21:39:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 21:39:40,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:40,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:40,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 21:39:40,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:40,304 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:40,305 INFO L85 PathProgramCache]: Analyzing trace with hash 191297324, now seen corresponding path program 1 times [2021-12-18 21:39:40,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:40,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774967858] [2021-12-18 21:39:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:40,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:40,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:40,306 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:40,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 21:39:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:40,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 21:39:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:40,462 INFO L388 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 13 treesize of output 9 [2021-12-18 21:39:40,486 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-18 21:39:40,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 21 treesize of output 20 [2021-12-18 21:39:40,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-18 21:39:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:40,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:39:40,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:40,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774967858] [2021-12-18 21:39:40,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774967858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:39:40,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:39:40,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 21:39:40,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989712368] [2021-12-18 21:39:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:39:40,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:39:40,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:40,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:39:40,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:39:40,521 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:39:40,928 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2021-12-18 21:39:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:39:40,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 21:39:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:39:40,930 INFO L225 Difference]: With dead ends: 162 [2021-12-18 21:39:40,930 INFO L226 Difference]: Without dead ends: 162 [2021-12-18 21:39:40,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:39:40,931 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 45 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:39:40,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 165 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:39:40,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-18 21:39:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2021-12-18 21:39:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 116 states have (on average 1.3189655172413792) internal successors, (153), 133 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2021-12-18 21:39:40,934 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 21 [2021-12-18 21:39:40,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:39:40,934 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2021-12-18 21:39:40,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:39:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2021-12-18 21:39:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 21:39:40,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:39:40,935 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:39:40,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-18 21:39:41,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:39:41,150 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:39:41,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:39:41,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1103011290, now seen corresponding path program 1 times [2021-12-18 21:39:41,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:39:41,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10116307] [2021-12-18 21:39:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:39:41,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:39:41,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:39:41,152 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:39:41,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-18 21:39:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:39:41,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 21:39:41,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:39:41,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:41,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:39:41,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:39:41,278 INFO L388 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 21 treesize of output 20 [2021-12-18 21:39:41,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:39:41,284 INFO L388 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 21 treesize of output 20 [2021-12-18 21:39:41,335 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:39:41,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2021-12-18 21:39:41,339 INFO L388 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 [2021-12-18 21:39:41,359 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:39:41,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2021-12-18 21:39:41,365 INFO L388 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 [2021-12-18 21:39:41,413 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-18 21:39:41,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 26 [2021-12-18 21:39:41,427 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-18 21:39:41,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 31 treesize of output 38 [2021-12-18 21:39:48,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:39:48,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:48,141 INFO L388 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 15 [2021-12-18 21:39:50,431 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-18 21:39:50,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 35 [2021-12-18 21:39:50,439 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:39:50,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-18 21:39:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:50,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:39:56,994 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-12-18 21:39:56,996 INFO L388 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 28 treesize of output 23 [2021-12-18 21:39:57,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:57,200 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-18 21:39:57,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:57,218 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-18 21:39:57,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:57,236 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-18 21:39:57,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:57,244 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-18 21:39:57,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:57,254 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-18 21:39:57,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:57,269 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-18 21:39:57,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:57,283 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-18 21:39:57,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:57,292 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-18 21:39:57,300 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~x~0#1.base| (_ BitVec 32))) (or (and (forall ((v_arrayElimArr_11 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_11 |c_ULTIMATE.start_main_~x~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_11) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_arrayElimArr_12 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_12 |c_ULTIMATE.start_main_~x~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|)) (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_12) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv0 32))))) (and (= |c_ULTIMATE.start_main_~x~0#1.offset| |c_ULTIMATE.start_main_~head~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1.base| |c_ULTIMATE.start_main_~head~0#1.base|)))) is different from false [2021-12-18 21:39:57,369 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~x~0#1.base| (_ BitVec 32))) (or (and (= |ULTIMATE.start_main_~x~0#1.base| |c_ULTIMATE.start_main_~head~0#1.base|) (= (_ bv0 32) |c_ULTIMATE.start_main_~head~0#1.offset|)) (and (forall ((v_arrayElimArr_11 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_11 (_ bv0 32)) |c_ULTIMATE.start_main_~head~0#1.offset|)) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_11) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_arrayElimArr_12 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_12) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv0 32)) (not (= (select v_arrayElimArr_12 (_ bv0 32)) |c_ULTIMATE.start_main_~head~0#1.base|))))))) is different from false [2021-12-18 21:39:57,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:39:57,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:57,749 INFO L388 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 67 [2021-12-18 21:39:57,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:39:57,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:39:57,761 INFO L388 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 72 [2021-12-18 21:39:57,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:39:57,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2021-12-18 21:39:57,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:39:57,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 66 [2021-12-18 21:39:57,777 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:39:57,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 33 treesize of output 29 [2021-12-18 21:39:57,783 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:39:57,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 25 [2021-12-18 21:39:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:39:57,795 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:39:57,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10116307] [2021-12-18 21:39:57,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10116307] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:39:57,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 21:39:57,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-12-18 21:39:57,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807837244] [2021-12-18 21:39:57,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 21:39:57,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 21:39:57,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:39:57,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 21:39:57,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=554, Unknown=20, NotChecked=98, Total=756 [2021-12-18 21:39:57,801 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2021-12-18 21:39:57,914 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv0 32)) (= (_ bv0 32) |c_ULTIMATE.start_main_~head~0#1.offset|) (forall ((|ULTIMATE.start_main_~x~0#1.base| (_ BitVec 32))) (or (and (= |ULTIMATE.start_main_~x~0#1.base| |c_ULTIMATE.start_main_~head~0#1.base|) (= (_ bv0 32) |c_ULTIMATE.start_main_~head~0#1.offset|)) (and (forall ((v_arrayElimArr_11 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_11 (_ bv0 32)) |c_ULTIMATE.start_main_~head~0#1.offset|)) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_11) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_arrayElimArr_12 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_12) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv0 32)) (not (= (select v_arrayElimArr_12 (_ bv0 32)) |c_ULTIMATE.start_main_~head~0#1.base|)))))))) is different from false [2021-12-18 21:39:57,921 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv0 32)) (forall ((|ULTIMATE.start_main_~x~0#1.base| (_ BitVec 32))) (or (and (forall ((v_arrayElimArr_11 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_11 |c_ULTIMATE.start_main_~x~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_11) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_arrayElimArr_12 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_12 |c_ULTIMATE.start_main_~x~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|)) (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_12) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv0 32))))) (and (= |c_ULTIMATE.start_main_~x~0#1.offset| |c_ULTIMATE.start_main_~head~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1.base| |c_ULTIMATE.start_main_~head~0#1.base|)))) (= (_ bv0 32) |c_ULTIMATE.start_main_~x~0#1.offset|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv0 32)) (= (_ bv0 32) |c_ULTIMATE.start_main_~head~0#1.offset|)) is different from false [2021-12-18 21:40:01,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:40:01,529 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2021-12-18 21:40:01,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 21:40:01,530 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) Word has length 22 [2021-12-18 21:40:01,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:40:01,531 INFO L225 Difference]: With dead ends: 146 [2021-12-18 21:40:01,531 INFO L226 Difference]: Without dead ends: 146 [2021-12-18 21:40:01,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=155, Invalid=830, Unknown=23, NotChecked=252, Total=1260 [2021-12-18 21:40:01,532 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 45 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:40:01,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 516 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 571 Invalid, 0 Unknown, 291 Unchecked, 1.1s Time] [2021-12-18 21:40:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-18 21:40:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2021-12-18 21:40:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 119 states have (on average 1.3109243697478992) internal successors, (156), 136 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:40:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2021-12-18 21:40:01,534 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 22 [2021-12-18 21:40:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:40:01,534 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2021-12-18 21:40:01,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2021-12-18 21:40:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2021-12-18 21:40:01,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 21:40:01,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:40:01,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:40:01,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-18 21:40:01,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:40:01,742 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:40:01,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:40:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1633618897, now seen corresponding path program 1 times [2021-12-18 21:40:01,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:40:01,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363929990] [2021-12-18 21:40:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:40:01,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:40:01,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:40:01,744 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:40:01,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-18 21:40:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:40:01,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 21:40:01,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:40:01,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:40:01,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:40:01,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:40:01,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:40:02,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:40:02,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:40:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:40:02,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:40:02,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:40:02,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363929990] [2021-12-18 21:40:02,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363929990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:40:02,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:40:02,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 21:40:02,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395068773] [2021-12-18 21:40:02,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:40:02,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 21:40:02,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:40:02,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 21:40:02,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:40:02,037 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-12-18 21:40:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:40:02,583 INFO L93 Difference]: Finished difference Result 165 states and 184 transitions. [2021-12-18 21:40:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:40:02,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-18 21:40:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:40:02,584 INFO L225 Difference]: With dead ends: 165 [2021-12-18 21:40:02,584 INFO L226 Difference]: Without dead ends: 165 [2021-12-18 21:40:02,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:40:02,584 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 53 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:40:02,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 240 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 21:40:02,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-18 21:40:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-12-18 21:40:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 130 states have (on average 1.2846153846153847) internal successors, (167), 147 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:40:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2021-12-18 21:40:02,591 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 22 [2021-12-18 21:40:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:40:02,591 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2021-12-18 21:40:02,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-12-18 21:40:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2021-12-18 21:40:02,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:40:02,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:40:02,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:40:02,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-18 21:40:02,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:40:02,800 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-18 21:40:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:40:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1267607554, now seen corresponding path program 2 times [2021-12-18 21:40:02,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:40:02,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600874417] [2021-12-18 21:40:02,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:40:02,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:40:02,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:40:02,801 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:40:02,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-18 21:40:02,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:40:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:40:02,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 21:40:02,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:40:02,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:40:02,938 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:40:02,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 14 [2021-12-18 21:40:02,958 INFO L388 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 6 treesize of output 5 [2021-12-18 21:40:02,962 INFO L388 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 11 treesize of output 7 [2021-12-18 21:40:03,038 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:40:03,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2021-12-18 21:40:03,042 INFO L388 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 [2021-12-18 21:40:03,060 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:40:03,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 22 treesize of output 22 [2021-12-18 21:40:03,087 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-18 21:40:03,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-18 21:40:03,090 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-12-18 21:40:03,273 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-18 21:40:03,273 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-12-18 21:40:03,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-18 21:40:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:40:03,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:40:05,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:40:05,556 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2021-12-18 21:40:05,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:40:05,563 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-12-18 21:40:05,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:40:05,593 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2021-12-18 21:40:05,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:40:05,599 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-12-18 21:40:06,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:40:06,302 INFO L388 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 38 treesize of output 39 [2021-12-18 21:40:06,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:40:06,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 474 treesize of output 502 [2021-12-18 21:40:06,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:40:06,413 INFO L388 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 798 treesize of output 697 [2021-12-18 21:40:06,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:40:06,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 690 treesize of output 642 [2021-12-18 21:40:06,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:40:06,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 608 treesize of output 666 [2021-12-18 21:40:06,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:40:06,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 648 treesize of output 698 Killed by 15