/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/bitvector/interleave_bits.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:36:21,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:36:21,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:36:21,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:36:21,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:36:21,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:36:21,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:36:21,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:36:21,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:36:21,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:36:21,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:36:21,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:36:21,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:36:21,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:36:21,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:36:21,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:36:21,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:36:21,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:36:21,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:36:21,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:36:21,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:36:21,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:36:21,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:36:21,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:36:21,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:36:21,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 01:36:21,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 01:36:21,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 01:36:21,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 01:36:21,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 01:36:21,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 01:36:21,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 01:36:21,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 01:36:21,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:36:21,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:36:21,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:36:21,872 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:36:21,912 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:36:21,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:36:21,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:36:21,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:36:21,914 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:36:21,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:36:21,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:36:21,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:36:21,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:36:21,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:36:21,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:36:21,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:36:21,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:36:21,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:36:21,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:36:21,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:36:21,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:36:21,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:36:21,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:36:21,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:36:21,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:36:21,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:36:21,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:36:21,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:36:21,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:36:21,918 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:36:22,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:36:22,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:36:22,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:36:22,346 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:36:22,348 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:36:22,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/interleave_bits.i [2020-12-23 01:36:22,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f493264d0/b8ffef0b791c42fdac5fbda9b9b8fbc0/FLAGdb092a596 [2020-12-23 01:36:23,208 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:36:23,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/bitvector/interleave_bits.i [2020-12-23 01:36:23,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f493264d0/b8ffef0b791c42fdac5fbda9b9b8fbc0/FLAGdb092a596 [2020-12-23 01:36:23,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f493264d0/b8ffef0b791c42fdac5fbda9b9b8fbc0 [2020-12-23 01:36:23,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:36:23,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:36:23,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:36:23,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:36:23,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:36:23,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:23,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23778adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23, skipping insertion in model container [2020-12-23 01:36:23,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:23,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:36:23,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:36:23,767 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/bitvector/interleave_bits.i[870,883] left hand side expression in assignment: lhs: VariableLHS[~xx~0,] left hand side expression in assignment: lhs: VariableLHS[~yy~0,] left hand side expression in assignment: lhs: VariableLHS[~xx~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~xx~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~xx~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~xx~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~yy~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~yy~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~yy~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~yy~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~zz~0,] ----Is the binary operator a bitwise operator? true [2020-12-23 01:36:23,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:36:23,831 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:36:23,846 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/bitvector/interleave_bits.i[870,883] left hand side expression in assignment: lhs: VariableLHS[~xx~0,] left hand side expression in assignment: lhs: VariableLHS[~yy~0,] left hand side expression in assignment: lhs: VariableLHS[~xx~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~xx~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~xx~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~xx~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~yy~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~yy~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~yy~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~yy~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~zz~0,] ----Is the binary operator a bitwise operator? true [2020-12-23 01:36:23,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:36:23,888 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:36:23,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23 WrapperNode [2020-12-23 01:36:23,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:36:23,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:36:23,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:36:23,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:36:23,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:23,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:24,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:36:24,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:36:24,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:36:24,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:36:24,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:24,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:24,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:24,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:24,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:24,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:24,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (1/1) ... [2020-12-23 01:36:24,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:36:24,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:36:24,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:36:24,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:36:24,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:36:24,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:36:24,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:36:24,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:36:24,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:36:25,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:36:25,168 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 01:36:25,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:36:25 BoogieIcfgContainer [2020-12-23 01:36:25,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:36:25,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:36:25,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:36:25,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:36:25,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:36:23" (1/3) ... [2020-12-23 01:36:25,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e496a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:36:25, skipping insertion in model container [2020-12-23 01:36:25,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:36:23" (2/3) ... [2020-12-23 01:36:25,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e496a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:36:25, skipping insertion in model container [2020-12-23 01:36:25,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:36:25" (3/3) ... [2020-12-23 01:36:25,180 INFO L111 eAbstractionObserver]: Analyzing ICFG interleave_bits.i [2020-12-23 01:36:25,188 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:36:25,195 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:36:25,218 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:36:25,249 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:36:25,250 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:36:25,250 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:36:25,250 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:36:25,250 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:36:25,250 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:36:25,251 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:36:25,251 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:36:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-12-23 01:36:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 01:36:25,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:25,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:25,290 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:25,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 545893010, now seen corresponding path program 1 times [2020-12-23 01:36:25,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:25,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987684166] [2020-12-23 01:36:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:25,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987684166] [2020-12-23 01:36:25,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:36:25,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:36:25,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136844567] [2020-12-23 01:36:25,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:36:25,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:25,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:36:25,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:36:25,635 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-12-23 01:36:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:25,677 INFO L93 Difference]: Finished difference Result 92 states and 168 transitions. [2020-12-23 01:36:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:36:25,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-23 01:36:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:25,692 INFO L225 Difference]: With dead ends: 92 [2020-12-23 01:36:25,692 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 01:36:25,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:36:25,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 01:36:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 01:36:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 01:36:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2020-12-23 01:36:25,743 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 16 [2020-12-23 01:36:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:25,744 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2020-12-23 01:36:25,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:36:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2020-12-23 01:36:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 01:36:25,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:25,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:25,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:36:25,746 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:25,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:25,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2142493001, now seen corresponding path program 1 times [2020-12-23 01:36:25,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:25,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562369888] [2020-12-23 01:36:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:25,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562369888] [2020-12-23 01:36:25,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16795445] [2020-12-23 01:36:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:26,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:36:26,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:26,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:26,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 01:36:26,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750127901] [2020-12-23 01:36:26,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:36:26,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:26,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:36:26,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:36:26,224 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand 5 states. [2020-12-23 01:36:26,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:26,260 INFO L93 Difference]: Finished difference Result 87 states and 127 transitions. [2020-12-23 01:36:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:36:26,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-23 01:36:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:26,262 INFO L225 Difference]: With dead ends: 87 [2020-12-23 01:36:26,262 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 01:36:26,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:36:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 01:36:26,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 01:36:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 01:36:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 66 transitions. [2020-12-23 01:36:26,271 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 66 transitions. Word has length 17 [2020-12-23 01:36:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:26,272 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 66 transitions. [2020-12-23 01:36:26,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:36:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 66 transitions. [2020-12-23 01:36:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 01:36:26,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:26,273 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:26,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 01:36:26,489 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash 416886578, now seen corresponding path program 2 times [2020-12-23 01:36:26,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:26,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780030722] [2020-12-23 01:36:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:26,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780030722] [2020-12-23 01:36:26,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558146110] [2020-12-23 01:36:26,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:26,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:36:26,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:26,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:36:26,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:26,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:26,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 01:36:26,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093662768] [2020-12-23 01:36:26,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:36:26,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:36:26,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:36:26,947 INFO L87 Difference]: Start difference. First operand 46 states and 66 transitions. Second operand 6 states. [2020-12-23 01:36:26,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:26,987 INFO L93 Difference]: Finished difference Result 88 states and 128 transitions. [2020-12-23 01:36:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:36:26,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-23 01:36:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:26,989 INFO L225 Difference]: With dead ends: 88 [2020-12-23 01:36:26,989 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 01:36:26,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:36:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 01:36:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 01:36:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 01:36:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2020-12-23 01:36:26,997 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 18 [2020-12-23 01:36:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:26,997 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 67 transitions. [2020-12-23 01:36:26,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:36:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions. [2020-12-23 01:36:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:36:26,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:26,999 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:27,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:27,214 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:27,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1846725097, now seen corresponding path program 3 times [2020-12-23 01:36:27,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:27,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906725094] [2020-12-23 01:36:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:27,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906725094] [2020-12-23 01:36:27,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422878040] [2020-12-23 01:36:27,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:27,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 01:36:27,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:36:27,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:27,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:27,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 01:36:27,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631204606] [2020-12-23 01:36:27,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:36:27,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:36:27,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:36:27,694 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand 7 states. [2020-12-23 01:36:27,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:27,740 INFO L93 Difference]: Finished difference Result 89 states and 129 transitions. [2020-12-23 01:36:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:36:27,741 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-23 01:36:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:27,742 INFO L225 Difference]: With dead ends: 89 [2020-12-23 01:36:27,742 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 01:36:27,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:36:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 01:36:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 01:36:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 01:36:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2020-12-23 01:36:27,749 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 19 [2020-12-23 01:36:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:27,749 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2020-12-23 01:36:27,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:36:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2020-12-23 01:36:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 01:36:27,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:27,751 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:27,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:27,965 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:27,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:27,966 INFO L82 PathProgramCache]: Analyzing trace with hash 995757010, now seen corresponding path program 4 times [2020-12-23 01:36:27,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:27,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888766172] [2020-12-23 01:36:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:28,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888766172] [2020-12-23 01:36:28,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020505031] [2020-12-23 01:36:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:28,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:36:28,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:36:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:28,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:28,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 01:36:28,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197571516] [2020-12-23 01:36:28,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:36:28,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:28,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:36:28,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:36:28,447 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 8 states. [2020-12-23 01:36:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:28,505 INFO L93 Difference]: Finished difference Result 90 states and 130 transitions. [2020-12-23 01:36:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:36:28,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-23 01:36:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:28,507 INFO L225 Difference]: With dead ends: 90 [2020-12-23 01:36:28,508 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 01:36:28,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:36:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 01:36:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 01:36:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 01:36:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2020-12-23 01:36:28,515 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 20 [2020-12-23 01:36:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:28,515 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2020-12-23 01:36:28,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:36:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2020-12-23 01:36:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:36:28,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:28,517 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:28,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:28,731 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:28,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1081610889, now seen corresponding path program 5 times [2020-12-23 01:36:28,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:28,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382197656] [2020-12-23 01:36:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:28,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382197656] [2020-12-23 01:36:28,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494079301] [2020-12-23 01:36:28,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:29,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 01:36:29,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:29,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:36:29,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:29,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:29,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 01:36:29,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104306066] [2020-12-23 01:36:29,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:36:29,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:29,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:36:29,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:36:29,318 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand 9 states. [2020-12-23 01:36:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:29,392 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2020-12-23 01:36:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:36:29,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-23 01:36:29,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:29,393 INFO L225 Difference]: With dead ends: 91 [2020-12-23 01:36:29,393 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 01:36:29,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:36:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 01:36:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 01:36:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 01:36:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2020-12-23 01:36:29,400 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 21 [2020-12-23 01:36:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:29,400 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2020-12-23 01:36:29,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:36:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2020-12-23 01:36:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 01:36:29,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:29,402 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:29,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 01:36:29,616 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:29,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1055506318, now seen corresponding path program 6 times [2020-12-23 01:36:29,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:29,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750446478] [2020-12-23 01:36:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:29,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750446478] [2020-12-23 01:36:29,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67409780] [2020-12-23 01:36:29,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:30,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 01:36:30,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:36:30,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:30,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:30,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 01:36:30,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171628449] [2020-12-23 01:36:30,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:36:30,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:36:30,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:36:30,309 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand 10 states. [2020-12-23 01:36:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:30,402 INFO L93 Difference]: Finished difference Result 92 states and 132 transitions. [2020-12-23 01:36:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:36:30,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-23 01:36:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:30,404 INFO L225 Difference]: With dead ends: 92 [2020-12-23 01:36:30,404 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 01:36:30,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:36:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 01:36:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 01:36:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 01:36:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2020-12-23 01:36:30,417 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 22 [2020-12-23 01:36:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:30,417 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2020-12-23 01:36:30,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:36:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2020-12-23 01:36:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:36:30,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:30,420 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:30,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:30,634 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:30,634 INFO L82 PathProgramCache]: Analyzing trace with hash -246264617, now seen corresponding path program 7 times [2020-12-23 01:36:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:30,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357373627] [2020-12-23 01:36:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:30,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357373627] [2020-12-23 01:36:30,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392117709] [2020-12-23 01:36:30,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:31,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:36:31,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:31,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:31,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 01:36:31,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744364151] [2020-12-23 01:36:31,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:36:31,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:31,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:36:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:36:31,260 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand 11 states. [2020-12-23 01:36:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:31,375 INFO L93 Difference]: Finished difference Result 93 states and 133 transitions. [2020-12-23 01:36:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:36:31,375 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-23 01:36:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:31,378 INFO L225 Difference]: With dead ends: 93 [2020-12-23 01:36:31,379 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 01:36:31,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:36:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 01:36:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 01:36:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 01:36:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2020-12-23 01:36:31,397 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 23 [2020-12-23 01:36:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:31,399 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2020-12-23 01:36:31,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:36:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2020-12-23 01:36:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:36:31,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:31,402 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:31,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:31,609 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:31,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:31,610 INFO L82 PathProgramCache]: Analyzing trace with hash -929575662, now seen corresponding path program 8 times [2020-12-23 01:36:31,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:31,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079628195] [2020-12-23 01:36:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:31,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079628195] [2020-12-23 01:36:31,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283697560] [2020-12-23 01:36:31,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:32,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:36:32,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:32,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:36:32,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:32,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:32,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 01:36:32,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643865296] [2020-12-23 01:36:32,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 01:36:32,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:32,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 01:36:32,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:36:32,305 INFO L87 Difference]: Start difference. First operand 52 states and 72 transitions. Second operand 12 states. [2020-12-23 01:36:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:32,434 INFO L93 Difference]: Finished difference Result 94 states and 134 transitions. [2020-12-23 01:36:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:36:32,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-12-23 01:36:32,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:32,437 INFO L225 Difference]: With dead ends: 94 [2020-12-23 01:36:32,437 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 01:36:32,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:36:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 01:36:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 01:36:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 01:36:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2020-12-23 01:36:32,442 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 24 [2020-12-23 01:36:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:32,443 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2020-12-23 01:36:32,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 01:36:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2020-12-23 01:36:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 01:36:32,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:32,444 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:32,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 01:36:32,658 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:32,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:32,659 INFO L82 PathProgramCache]: Analyzing trace with hash -637381577, now seen corresponding path program 9 times [2020-12-23 01:36:32,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:32,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218926638] [2020-12-23 01:36:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:33,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218926638] [2020-12-23 01:36:33,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82378231] [2020-12-23 01:36:33,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:33,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 01:36:33,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 01:36:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:33,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:33,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 01:36:33,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497288976] [2020-12-23 01:36:33,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:36:33,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:33,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:36:33,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:36:33,623 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand 13 states. [2020-12-23 01:36:33,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:33,775 INFO L93 Difference]: Finished difference Result 95 states and 135 transitions. [2020-12-23 01:36:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:36:33,775 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-12-23 01:36:33,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:33,777 INFO L225 Difference]: With dead ends: 95 [2020-12-23 01:36:33,777 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 01:36:33,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:36:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 01:36:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 01:36:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 01:36:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-12-23 01:36:33,784 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 25 [2020-12-23 01:36:33,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:33,787 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-12-23 01:36:33,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:36:33,787 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-12-23 01:36:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 01:36:33,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:33,794 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:34,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:34,009 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash -169299534, now seen corresponding path program 10 times [2020-12-23 01:36:34,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:34,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444900759] [2020-12-23 01:36:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:34,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444900759] [2020-12-23 01:36:34,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816954410] [2020-12-23 01:36:34,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:34,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:36:34,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:34,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 01:36:34,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:34,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:34,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 01:36:34,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003169000] [2020-12-23 01:36:34,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 01:36:34,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:34,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 01:36:34,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:36:34,846 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 14 states. [2020-12-23 01:36:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:35,031 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2020-12-23 01:36:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:36:35,032 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-23 01:36:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:35,033 INFO L225 Difference]: With dead ends: 96 [2020-12-23 01:36:35,033 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 01:36:35,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:36:35,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 01:36:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-23 01:36:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 01:36:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2020-12-23 01:36:35,038 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 26 [2020-12-23 01:36:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:35,038 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2020-12-23 01:36:35,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 01:36:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2020-12-23 01:36:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 01:36:35,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:35,039 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:35,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:35,254 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1456341911, now seen corresponding path program 11 times [2020-12-23 01:36:35,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:35,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741850152] [2020-12-23 01:36:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:35,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741850152] [2020-12-23 01:36:35,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825259615] [2020-12-23 01:36:35,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:36,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 01:36:36,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 01:36:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:36,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:36,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 01:36:36,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714041545] [2020-12-23 01:36:36,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:36:36,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:36,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:36:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:36:36,562 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand 15 states. [2020-12-23 01:36:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:36,808 INFO L93 Difference]: Finished difference Result 97 states and 137 transitions. [2020-12-23 01:36:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:36:36,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-12-23 01:36:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:36,812 INFO L225 Difference]: With dead ends: 97 [2020-12-23 01:36:36,812 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 01:36:36,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:36:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 01:36:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 01:36:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 01:36:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2020-12-23 01:36:36,821 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 27 [2020-12-23 01:36:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:36,821 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2020-12-23 01:36:36,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:36:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2020-12-23 01:36:36,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 01:36:36,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:36,825 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:37,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 01:36:37,027 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:37,028 INFO L82 PathProgramCache]: Analyzing trace with hash 311619154, now seen corresponding path program 12 times [2020-12-23 01:36:37,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:37,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986911478] [2020-12-23 01:36:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:37,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986911478] [2020-12-23 01:36:37,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9182749] [2020-12-23 01:36:37,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:38,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:36:38,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:38,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 01:36:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:38,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:38,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 01:36:38,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136036975] [2020-12-23 01:36:38,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:36:38,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:38,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:36:38,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:36:38,390 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand 16 states. [2020-12-23 01:36:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:38,673 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2020-12-23 01:36:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:36:38,677 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-12-23 01:36:38,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:38,677 INFO L225 Difference]: With dead ends: 98 [2020-12-23 01:36:38,677 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 01:36:38,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:36:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 01:36:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 01:36:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 01:36:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-12-23 01:36:38,682 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 28 [2020-12-23 01:36:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:38,682 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-12-23 01:36:38,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:36:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-12-23 01:36:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:36:38,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:38,683 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:38,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:36:38,888 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash -815047945, now seen corresponding path program 13 times [2020-12-23 01:36:38,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:38,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720660297] [2020-12-23 01:36:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:39,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720660297] [2020-12-23 01:36:39,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027944059] [2020-12-23 01:36:39,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 01:36:39,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:39,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:39,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 01:36:39,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966478748] [2020-12-23 01:36:39,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:36:39,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:39,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:36:39,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:36:39,934 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 17 states. [2020-12-23 01:36:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:40,225 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2020-12-23 01:36:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:36:40,226 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-12-23 01:36:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:40,226 INFO L225 Difference]: With dead ends: 99 [2020-12-23 01:36:40,227 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 01:36:40,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:36:40,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 01:36:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 01:36:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 01:36:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2020-12-23 01:36:40,231 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 29 [2020-12-23 01:36:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:40,232 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2020-12-23 01:36:40,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:36:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2020-12-23 01:36:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 01:36:40,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:40,232 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:40,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:36:40,447 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1381989646, now seen corresponding path program 14 times [2020-12-23 01:36:40,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:40,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348970073] [2020-12-23 01:36:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:40,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348970073] [2020-12-23 01:36:40,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691208407] [2020-12-23 01:36:40,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:41,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:36:41,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 01:36:41,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:41,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:41,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 01:36:41,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467117912] [2020-12-23 01:36:41,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:36:41,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:41,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:36:41,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:36:41,525 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand 18 states. [2020-12-23 01:36:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:41,828 INFO L93 Difference]: Finished difference Result 100 states and 140 transitions. [2020-12-23 01:36:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:36:41,831 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-12-23 01:36:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:41,832 INFO L225 Difference]: With dead ends: 100 [2020-12-23 01:36:41,832 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 01:36:41,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:36:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 01:36:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 01:36:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 01:36:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2020-12-23 01:36:41,837 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 30 [2020-12-23 01:36:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:41,837 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2020-12-23 01:36:41,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:36:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2020-12-23 01:36:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:36:41,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:41,838 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:42,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:42,052 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1777313193, now seen corresponding path program 15 times [2020-12-23 01:36:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:42,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250217145] [2020-12-23 01:36:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:36:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:42,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250217145] [2020-12-23 01:36:42,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773948726] [2020-12-23 01:36:42,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:36:43,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 01:36:43,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:36:43,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 01:36:43,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:36:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:36:43,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:36:43,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 01:36:43,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306144068] [2020-12-23 01:36:43,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:36:43,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:36:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:36:43,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:36:43,809 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand 19 states. [2020-12-23 01:36:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:36:44,218 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2020-12-23 01:36:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:36:44,220 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-12-23 01:36:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:36:44,220 INFO L225 Difference]: With dead ends: 101 [2020-12-23 01:36:44,221 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 01:36:44,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:36:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 01:36:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 01:36:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 01:36:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2020-12-23 01:36:44,225 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 31 [2020-12-23 01:36:44,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:36:44,226 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2020-12-23 01:36:44,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:36:44,226 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2020-12-23 01:36:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 01:36:44,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:36:44,227 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:36:44,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:36:44,433 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:36:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:36:44,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1147441262, now seen corresponding path program 16 times [2020-12-23 01:36:44,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:36:44,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021656877] [2020-12-23 01:36:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:36:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:36:44,719 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:36:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:36:44,870 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:36:44,932 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 01:36:44,932 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 01:36:44,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 01:36:45,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 01:36:45 BoogieIcfgContainer [2020-12-23 01:36:45,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 01:36:45,017 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 01:36:45,017 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 01:36:45,017 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 01:36:45,018 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:36:25" (3/4) ... [2020-12-23 01:36:45,023 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 01:36:45,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 01:36:45,025 INFO L168 Benchmark]: Toolchain (without parser) took 21502.68 ms. Allocated memory was 153.1 MB in the beginning and 357.6 MB in the end (delta: 204.5 MB). Free memory was 109.8 MB in the beginning and 272.8 MB in the end (delta: -163.1 MB). Peak memory consumption was 42.3 MB. Max. memory is 8.0 GB. [2020-12-23 01:36:45,026 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 153.1 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:36:45,026 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.75 ms. Allocated memory is still 153.1 MB. Free memory was 109.6 MB in the beginning and 128.6 MB in the end (delta: -19.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:36:45,027 INFO L168 Benchmark]: Boogie Procedure Inliner took 164.02 ms. Allocated memory is still 153.1 MB. Free memory was 128.6 MB in the beginning and 127.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:36:45,027 INFO L168 Benchmark]: Boogie Preprocessor took 115.03 ms. Allocated memory is still 153.1 MB. Free memory was 127.3 MB in the beginning and 120.1 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2020-12-23 01:36:45,028 INFO L168 Benchmark]: RCFGBuilder took 999.10 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 120.1 MB in the beginning and 154.4 MB in the end (delta: -34.2 MB). Peak memory consumption was 37.9 MB. Max. memory is 8.0 GB. [2020-12-23 01:36:45,029 INFO L168 Benchmark]: TraceAbstraction took 19844.41 ms. Allocated memory was 184.5 MB in the beginning and 357.6 MB in the end (delta: 173.0 MB). Free memory was 153.8 MB in the beginning and 273.4 MB in the end (delta: -119.5 MB). Peak memory consumption was 53.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:36:45,029 INFO L168 Benchmark]: Witness Printer took 5.89 ms. Allocated memory is still 357.6 MB. Free memory was 273.4 MB in the beginning and 272.8 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:36:45,032 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 153.1 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 360.75 ms. Allocated memory is still 153.1 MB. Free memory was 109.6 MB in the beginning and 128.6 MB in the end (delta: -19.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 164.02 ms. Allocated memory is still 153.1 MB. Free memory was 128.6 MB in the beginning and 127.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 115.03 ms. Allocated memory is still 153.1 MB. Free memory was 127.3 MB in the beginning and 120.1 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 999.10 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 120.1 MB in the beginning and 154.4 MB in the end (delta: -34.2 MB). Peak memory consumption was 37.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19844.41 ms. Allocated memory was 184.5 MB in the beginning and 357.6 MB in the end (delta: 173.0 MB). Free memory was 153.8 MB in the beginning and 273.4 MB in the end (delta: -119.5 MB). Peak memory consumption was 53.0 MB. Max. memory is 8.0 GB. * Witness Printer took 5.89 ms. Allocated memory is still 357.6 MB. Free memory was 273.4 MB in the beginning and 272.8 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 42, overapproximation of bitwiseOr at line 54. Possible FailurePath: [L34] unsigned short x = __VERIFIER_nondet_ushort(); [L35] unsigned short y = __VERIFIER_nondet_ushort(); [L36] unsigned int xx; [L37] unsigned int yy; [L38] unsigned int zz; [L39] unsigned int z = 0; [L40] unsigned int i = 0; [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND FALSE !(i < sizeof(x) * 8) [L45] xx = x [L46] yy = y [L47] xx = (xx | (xx << 8u)) & 16711935U [L48] xx = (xx | (xx << 4u)) & 252645135U [L49] xx = (xx | (xx << 2u)) & 858993459U [L50] xx = (xx | (xx << 1u)) & 1431655765U [L51] yy = (yy | (yy << 8u)) & 16711935U [L52] yy = (yy | (yy << 4u)) & 252645135U [L53] yy = (yy | (yy << 2u)) & 858993459U [L54] yy = (yy | (yy << 1u)) & 1431655765U [L56] zz = xx | (yy << 1U) VAL [zz = xx | (yy << 1U)=0] [L16] COND TRUE !(cond) VAL [zz = xx | (yy << 1U)=0] [L17] reach_error() VAL [zz = xx | (yy << 1U)=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.6s, OverallIterations: 17, TraceHistogramMax: 16, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1011 SDtfs, 0 SDslu, 6286 SDs, 0 SdLazy, 1702 SolverSat, 120 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 513 GetRequests, 329 SyntacticMatches, 33 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.4s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 768 NumberOfCodeBlocks, 768 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 705 ConstructedInterpolants, 0 QuantifiedInterpolants, 55861 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1830 ConjunctsInSsa, 305 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1360 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...