/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-178dd20 [2021-01-06 11:31:24,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:31:24,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:31:24,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:31:24,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:31:24,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:31:24,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:31:24,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:31:24,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:31:24,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:31:24,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:31:24,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:31:24,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:31:24,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:31:24,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:31:24,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:31:24,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:31:24,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:31:24,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:31:24,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:31:24,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:31:24,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:31:24,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:31:24,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:31:24,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:31:24,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:31:24,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:31:24,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:31:24,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:31:24,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:31:24,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:31:24,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:31:24,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:31:24,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:31:24,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:31:24,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:31:24,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 11:31:24,492 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:31:24,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:31:24,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:31:24,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:31:24,494 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:31:24,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:31:24,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:31:24,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:31:24,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:31:24,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:31:24,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:31:24,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:31:24,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:31:24,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:31:24,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:31:24,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:31:24,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:31:24,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:31:24,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:31:24,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:31:24,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:31:24,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:31:24,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:31:24,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:31:24,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:31:24,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:31:24,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:31:24,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:31:24,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:31:24,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:31:24,967 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:31:24,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/interleave_bits.i [2021-01-06 11:31:25,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/954bb4d5c/92cfe2d5d5c6478f9ab7d42ddc9a7a48/FLAGd1a6617f0 [2021-01-06 11:31:25,735 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:31:25,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/bitvector/interleave_bits.i [2021-01-06 11:31:25,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/954bb4d5c/92cfe2d5d5c6478f9ab7d42ddc9a7a48/FLAGd1a6617f0 [2021-01-06 11:31:26,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/954bb4d5c/92cfe2d5d5c6478f9ab7d42ddc9a7a48 [2021-01-06 11:31:26,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:31:26,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:31:26,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:31:26,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:31:26,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:31:26,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9716742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26, skipping insertion in model container [2021-01-06 11:31:26,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:31:26,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:31:26,276 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 [2021-01-06 11:31:26,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:31:26,354 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:31:26,380 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 [2021-01-06 11:31:26,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:31:26,478 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:31:26,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26 WrapperNode [2021-01-06 11:31:26,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:31:26,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:31:26,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:31:26,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:31:26,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:31:26,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:31:26,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:31:26,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:31:26,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (1/1) ... [2021-01-06 11:31:26,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:31:26,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:31:26,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:31:26,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:31:26,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (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 [2021-01-06 11:31:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:31:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:31:26,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:31:26,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:31:27,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:31:27,689 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 11:31:27,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:31:27 BoogieIcfgContainer [2021-01-06 11:31:27,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:31:27,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:31:27,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:31:27,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:31:27,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:31:26" (1/3) ... [2021-01-06 11:31:27,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b48de2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:31:27, skipping insertion in model container [2021-01-06 11:31:27,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:31:26" (2/3) ... [2021-01-06 11:31:27,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b48de2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:31:27, skipping insertion in model container [2021-01-06 11:31:27,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:31:27" (3/3) ... [2021-01-06 11:31:27,702 INFO L111 eAbstractionObserver]: Analyzing ICFG interleave_bits.i [2021-01-06 11:31:27,709 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:31:27,716 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:31:27,740 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:31:27,771 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:31:27,772 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:31:27,772 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:31:27,772 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:31:27,772 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:31:27,772 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:31:27,773 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:31:27,773 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:31:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2021-01-06 11:31:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:31:27,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:27,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:27,800 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:27,808 INFO L82 PathProgramCache]: Analyzing trace with hash 545893010, now seen corresponding path program 1 times [2021-01-06 11:31:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:27,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484704401] [2021-01-06 11:31:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:28,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484704401] [2021-01-06 11:31:28,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:31:28,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:31:28,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827595858] [2021-01-06 11:31:28,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:31:28,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:31:28,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:31:28,146 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2021-01-06 11:31:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:28,369 INFO L93 Difference]: Finished difference Result 121 states and 218 transitions. [2021-01-06 11:31:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:31:28,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-01-06 11:31:28,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:28,384 INFO L225 Difference]: With dead ends: 121 [2021-01-06 11:31:28,385 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 11:31:28,388 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 [2021-01-06 11:31:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 11:31:28,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2021-01-06 11:31:28,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 11:31:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 92 transitions. [2021-01-06 11:31:28,432 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 92 transitions. Word has length 16 [2021-01-06 11:31:28,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:28,432 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 92 transitions. [2021-01-06 11:31:28,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:31:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 92 transitions. [2021-01-06 11:31:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 11:31:28,434 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:28,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:28,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:31:28,435 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash -255758641, now seen corresponding path program 1 times [2021-01-06 11:31:28,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:28,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837294400] [2021-01-06 11:31:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:28,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837294400] [2021-01-06 11:31:28,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:31:28,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:31:28,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515931550] [2021-01-06 11:31:28,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:31:28,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:28,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:31:28,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:31:28,512 INFO L87 Difference]: Start difference. First operand 64 states and 92 transitions. Second operand 3 states. [2021-01-06 11:31:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:28,530 INFO L93 Difference]: Finished difference Result 126 states and 182 transitions. [2021-01-06 11:31:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:31:28,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 11:31:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:28,533 INFO L225 Difference]: With dead ends: 126 [2021-01-06 11:31:28,533 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 11:31:28,535 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 [2021-01-06 11:31:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 11:31:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-01-06 11:31:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 11:31:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 93 transitions. [2021-01-06 11:31:28,545 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 93 transitions. Word has length 17 [2021-01-06 11:31:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:28,546 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 93 transitions. [2021-01-06 11:31:28,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:31:28,546 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 93 transitions. [2021-01-06 11:31:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:31:28,547 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:28,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:28,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:31:28,548 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:28,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:28,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1991346358, now seen corresponding path program 1 times [2021-01-06 11:31:28,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:28,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461212117] [2021-01-06 11:31:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:28,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461212117] [2021-01-06 11:31:28,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304649701] [2021-01-06 11:31:28,751 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 [2021-01-06 11:31:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:31:28,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:28,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:28,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 11:31:28,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675232473] [2021-01-06 11:31:28,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:31:28,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:28,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:31:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:31:28,967 INFO L87 Difference]: Start difference. First operand 65 states and 93 transitions. Second operand 5 states. [2021-01-06 11:31:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:28,997 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2021-01-06 11:31:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:31:28,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2021-01-06 11:31:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:28,999 INFO L225 Difference]: With dead ends: 127 [2021-01-06 11:31:28,999 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 11:31:29,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:31:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 11:31:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 11:31:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 11:31:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2021-01-06 11:31:29,010 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 18 [2021-01-06 11:31:29,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:29,010 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2021-01-06 11:31:29,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:31:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2021-01-06 11:31:29,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 11:31:29,011 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:29,012 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:29,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 11:31:29,227 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash 40009263, now seen corresponding path program 2 times [2021-01-06 11:31:29,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:29,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798563675] [2021-01-06 11:31:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:29,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798563675] [2021-01-06 11:31:29,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838799329] [2021-01-06 11:31:29,431 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 [2021-01-06 11:31:29,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:31:29,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:29,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:31:29,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:29,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:29,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 11:31:29,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039712195] [2021-01-06 11:31:29,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:31:29,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:29,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:31:29,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:31:29,648 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand 6 states. [2021-01-06 11:31:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:29,679 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2021-01-06 11:31:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:31:29,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 11:31:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:29,681 INFO L225 Difference]: With dead ends: 128 [2021-01-06 11:31:29,681 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 11:31:29,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:31:29,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 11:31:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-01-06 11:31:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 11:31:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 95 transitions. [2021-01-06 11:31:29,690 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 95 transitions. Word has length 19 [2021-01-06 11:31:29,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:29,691 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 95 transitions. [2021-01-06 11:31:29,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:31:29,691 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 95 transitions. [2021-01-06 11:31:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 11:31:29,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:29,692 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:29,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:31:29,907 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1412475926, now seen corresponding path program 3 times [2021-01-06 11:31:29,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:29,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134898180] [2021-01-06 11:31:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:30,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134898180] [2021-01-06 11:31:30,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469264669] [2021-01-06 11:31:30,065 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 [2021-01-06 11:31:30,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 11:31:30,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:30,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:31:30,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:30,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:30,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 11:31:30,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389476217] [2021-01-06 11:31:30,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:31:30,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:30,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:31:30,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:31:30,294 INFO L87 Difference]: Start difference. First operand 67 states and 95 transitions. Second operand 7 states. [2021-01-06 11:31:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:30,333 INFO L93 Difference]: Finished difference Result 129 states and 185 transitions. [2021-01-06 11:31:30,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:31:30,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2021-01-06 11:31:30,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:30,335 INFO L225 Difference]: With dead ends: 129 [2021-01-06 11:31:30,335 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 11:31:30,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:31:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 11:31:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-01-06 11:31:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 11:31:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2021-01-06 11:31:30,343 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 20 [2021-01-06 11:31:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:30,344 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2021-01-06 11:31:30,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:31:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2021-01-06 11:31:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 11:31:30,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:30,345 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:30,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:31:30,560 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:30,562 INFO L82 PathProgramCache]: Analyzing trace with hash 805123471, now seen corresponding path program 4 times [2021-01-06 11:31:30,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:30,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214139774] [2021-01-06 11:31:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:30,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214139774] [2021-01-06 11:31:30,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478691903] [2021-01-06 11:31:30,748 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 [2021-01-06 11:31:30,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:31:30,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:30,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:31:30,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:30,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:30,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 11:31:30,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657633227] [2021-01-06 11:31:30,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:31:30,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:30,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:31:30,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:31:30,954 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand 8 states. [2021-01-06 11:31:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:31,002 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-01-06 11:31:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:31:31,002 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-01-06 11:31:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:31,004 INFO L225 Difference]: With dead ends: 130 [2021-01-06 11:31:31,004 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 11:31:31,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:31:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 11:31:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-01-06 11:31:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 11:31:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2021-01-06 11:31:31,012 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 21 [2021-01-06 11:31:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:31,012 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2021-01-06 11:31:31,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:31:31,013 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2021-01-06 11:31:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 11:31:31,014 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:31,014 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:31,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:31:31,228 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash 831228042, now seen corresponding path program 5 times [2021-01-06 11:31:31,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:31,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298809196] [2021-01-06 11:31:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:31,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298809196] [2021-01-06 11:31:31,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943770119] [2021-01-06 11:31:31,447 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 [2021-01-06 11:31:31,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 11:31:31,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:31,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:31:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:31,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:31,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 11:31:31,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618061241] [2021-01-06 11:31:31,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:31:31,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:31,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:31:31,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:31:31,742 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand 9 states. [2021-01-06 11:31:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:31,805 INFO L93 Difference]: Finished difference Result 131 states and 187 transitions. [2021-01-06 11:31:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:31:31,806 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2021-01-06 11:31:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:31,807 INFO L225 Difference]: With dead ends: 131 [2021-01-06 11:31:31,807 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 11:31:31,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:31:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 11:31:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-01-06 11:31:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 11:31:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2021-01-06 11:31:31,815 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 22 [2021-01-06 11:31:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:31,815 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2021-01-06 11:31:31,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:31:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2021-01-06 11:31:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 11:31:31,816 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:31,817 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:32,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 11:31:32,032 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:32,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:32,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1640469743, now seen corresponding path program 6 times [2021-01-06 11:31:32,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:32,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910049026] [2021-01-06 11:31:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:32,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910049026] [2021-01-06 11:31:32,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469356077] [2021-01-06 11:31:32,255 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 [2021-01-06 11:31:32,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 11:31:32,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 11:31:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:32,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:32,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 11:31:32,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017324813] [2021-01-06 11:31:32,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:31:32,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:32,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:31:32,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:31:32,572 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 10 states. [2021-01-06 11:31:32,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:32,648 INFO L93 Difference]: Finished difference Result 132 states and 188 transitions. [2021-01-06 11:31:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:31:32,648 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2021-01-06 11:31:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:32,649 INFO L225 Difference]: With dead ends: 132 [2021-01-06 11:31:32,650 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 11:31:32,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:31:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 11:31:32,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-01-06 11:31:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 11:31:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2021-01-06 11:31:32,656 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 23 [2021-01-06 11:31:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:32,657 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2021-01-06 11:31:32,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:31:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2021-01-06 11:31:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 11:31:32,658 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:32,658 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:32,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:31:32,874 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:32,875 INFO L82 PathProgramCache]: Analyzing trace with hash 957158698, now seen corresponding path program 7 times [2021-01-06 11:31:32,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:32,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975425565] [2021-01-06 11:31:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:33,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975425565] [2021-01-06 11:31:33,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648696197] [2021-01-06 11:31:33,193 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 [2021-01-06 11:31:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:31:33,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:33,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:33,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 11:31:33,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895297276] [2021-01-06 11:31:33,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:31:33,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:33,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:31:33,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:31:33,467 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand 11 states. [2021-01-06 11:31:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:33,547 INFO L93 Difference]: Finished difference Result 133 states and 189 transitions. [2021-01-06 11:31:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:31:33,548 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2021-01-06 11:31:33,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:33,549 INFO L225 Difference]: With dead ends: 133 [2021-01-06 11:31:33,549 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 11:31:33,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:31:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 11:31:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 11:31:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 11:31:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2021-01-06 11:31:33,560 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 24 [2021-01-06 11:31:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:33,561 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2021-01-06 11:31:33,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:31:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2021-01-06 11:31:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 11:31:33,563 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:33,563 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:33,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:31:33,780 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:33,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1249352783, now seen corresponding path program 8 times [2021-01-06 11:31:33,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:33,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504844849] [2021-01-06 11:31:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:34,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504844849] [2021-01-06 11:31:34,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706582949] [2021-01-06 11:31:34,128 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 [2021-01-06 11:31:34,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:31:34,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:34,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:31:34,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:34,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:34,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 11:31:34,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688650995] [2021-01-06 11:31:34,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 11:31:34,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:34,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 11:31:34,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:31:34,426 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand 12 states. [2021-01-06 11:31:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:34,521 INFO L93 Difference]: Finished difference Result 134 states and 190 transitions. [2021-01-06 11:31:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:31:34,521 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-01-06 11:31:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:34,522 INFO L225 Difference]: With dead ends: 134 [2021-01-06 11:31:34,522 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 11:31:34,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:31:34,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 11:31:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-01-06 11:31:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 11:31:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 101 transitions. [2021-01-06 11:31:34,528 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 101 transitions. Word has length 25 [2021-01-06 11:31:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:34,529 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 101 transitions. [2021-01-06 11:31:34,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 11:31:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 101 transitions. [2021-01-06 11:31:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 11:31:34,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:34,530 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:34,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:31:34,744 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:34,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:34,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1717434826, now seen corresponding path program 9 times [2021-01-06 11:31:34,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:34,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816106850] [2021-01-06 11:31:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:35,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816106850] [2021-01-06 11:31:35,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476881660] [2021-01-06 11:31:35,169 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 [2021-01-06 11:31:35,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 11:31:35,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:35,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 11:31:35,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:35,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:35,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 11:31:35,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274659121] [2021-01-06 11:31:35,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:31:35,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:35,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:31:35,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:31:35,618 INFO L87 Difference]: Start difference. First operand 73 states and 101 transitions. Second operand 13 states. [2021-01-06 11:31:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:35,743 INFO L93 Difference]: Finished difference Result 135 states and 191 transitions. [2021-01-06 11:31:35,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:31:35,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2021-01-06 11:31:35,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:35,745 INFO L225 Difference]: With dead ends: 135 [2021-01-06 11:31:35,746 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 11:31:35,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:31:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 11:31:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-01-06 11:31:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 11:31:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2021-01-06 11:31:35,756 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 26 [2021-01-06 11:31:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:35,756 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2021-01-06 11:31:35,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:31:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2021-01-06 11:31:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 11:31:35,760 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:35,761 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:35,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:31:35,977 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:35,979 INFO L82 PathProgramCache]: Analyzing trace with hash -951891025, now seen corresponding path program 10 times [2021-01-06 11:31:35,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:35,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3955475] [2021-01-06 11:31:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:36,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3955475] [2021-01-06 11:31:36,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632404061] [2021-01-06 11:31:36,310 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 [2021-01-06 11:31:36,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:31:36,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:36,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 11:31:36,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:36,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:36,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 11:31:36,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698598990] [2021-01-06 11:31:36,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:31:36,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:36,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:31:36,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:31:36,746 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand 14 states. [2021-01-06 11:31:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:36,880 INFO L93 Difference]: Finished difference Result 136 states and 192 transitions. [2021-01-06 11:31:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:31:36,880 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2021-01-06 11:31:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:36,882 INFO L225 Difference]: With dead ends: 136 [2021-01-06 11:31:36,882 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 11:31:36,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:31:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 11:31:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-01-06 11:31:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 11:31:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2021-01-06 11:31:36,895 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 27 [2021-01-06 11:31:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:36,896 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2021-01-06 11:31:36,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:31:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2021-01-06 11:31:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 11:31:36,897 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:36,897 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:37,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:31:37,112 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2096613782, now seen corresponding path program 11 times [2021-01-06 11:31:37,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:37,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459819268] [2021-01-06 11:31:37,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:37,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459819268] [2021-01-06 11:31:37,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732871275] [2021-01-06 11:31:37,479 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 [2021-01-06 11:31:38,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 11:31:38,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:38,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 11:31:38,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:38,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:38,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 11:31:38,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944244002] [2021-01-06 11:31:38,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:31:38,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:38,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:31:38,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:31:38,286 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand 15 states. [2021-01-06 11:31:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:38,428 INFO L93 Difference]: Finished difference Result 137 states and 193 transitions. [2021-01-06 11:31:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:31:38,429 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2021-01-06 11:31:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:38,430 INFO L225 Difference]: With dead ends: 137 [2021-01-06 11:31:38,430 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 11:31:38,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:31:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 11:31:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-01-06 11:31:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 11:31:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 104 transitions. [2021-01-06 11:31:38,435 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 104 transitions. Word has length 28 [2021-01-06 11:31:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:38,435 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 104 transitions. [2021-01-06 11:31:38,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:31:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 104 transitions. [2021-01-06 11:31:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 11:31:38,436 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:38,436 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:38,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 11:31:38,647 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:38,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1071686415, now seen corresponding path program 12 times [2021-01-06 11:31:38,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:38,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319177817] [2021-01-06 11:31:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:39,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319177817] [2021-01-06 11:31:39,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139530682] [2021-01-06 11:31:39,013 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 [2021-01-06 11:31:39,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 11:31:39,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:39,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 11:31:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:39,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:39,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 11:31:39,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410641336] [2021-01-06 11:31:39,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:31:39,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:39,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:31:39,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:31:39,746 INFO L87 Difference]: Start difference. First operand 76 states and 104 transitions. Second operand 16 states. [2021-01-06 11:31:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:39,934 INFO L93 Difference]: Finished difference Result 138 states and 194 transitions. [2021-01-06 11:31:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:31:39,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2021-01-06 11:31:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:39,943 INFO L225 Difference]: With dead ends: 138 [2021-01-06 11:31:39,943 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 11:31:39,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:31:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 11:31:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-01-06 11:31:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 11:31:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2021-01-06 11:31:39,948 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 29 [2021-01-06 11:31:39,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:39,949 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2021-01-06 11:31:39,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:31:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2021-01-06 11:31:39,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 11:31:39,949 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:39,950 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:40,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:31:40,158 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:40,160 INFO L82 PathProgramCache]: Analyzing trace with hash 504744714, now seen corresponding path program 13 times [2021-01-06 11:31:40,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:40,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255083724] [2021-01-06 11:31:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:40,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255083724] [2021-01-06 11:31:40,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258751713] [2021-01-06 11:31:40,605 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 [2021-01-06 11:31:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:40,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 11:31:40,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:40,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:40,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 11:31:40,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746354424] [2021-01-06 11:31:40,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:31:40,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:40,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:31:40,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:31:40,969 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand 17 states. [2021-01-06 11:31:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:41,181 INFO L93 Difference]: Finished difference Result 139 states and 195 transitions. [2021-01-06 11:31:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:31:41,182 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2021-01-06 11:31:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:41,183 INFO L225 Difference]: With dead ends: 139 [2021-01-06 11:31:41,183 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 11:31:41,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:31:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 11:31:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-01-06 11:31:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 11:31:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 106 transitions. [2021-01-06 11:31:41,188 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 106 transitions. Word has length 30 [2021-01-06 11:31:41,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:41,188 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 106 transitions. [2021-01-06 11:31:41,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:31:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 106 transitions. [2021-01-06 11:31:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 11:31:41,189 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:41,189 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:41,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 11:31:41,403 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash 109421167, now seen corresponding path program 14 times [2021-01-06 11:31:41,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:41,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158798337] [2021-01-06 11:31:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:41,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158798337] [2021-01-06 11:31:41,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324650597] [2021-01-06 11:31:41,863 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 [2021-01-06 11:31:42,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:31:42,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:42,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 11:31:42,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:42,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:42,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 11:31:42,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500301757] [2021-01-06 11:31:42,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 11:31:42,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:42,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 11:31:42,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:31:42,251 INFO L87 Difference]: Start difference. First operand 78 states and 106 transitions. Second operand 18 states. [2021-01-06 11:31:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:42,474 INFO L93 Difference]: Finished difference Result 140 states and 196 transitions. [2021-01-06 11:31:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:31:42,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2021-01-06 11:31:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:42,476 INFO L225 Difference]: With dead ends: 140 [2021-01-06 11:31:42,476 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 11:31:42,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:31:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 11:31:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-01-06 11:31:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 11:31:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 107 transitions. [2021-01-06 11:31:42,481 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 107 transitions. Word has length 31 [2021-01-06 11:31:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:42,481 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 107 transitions. [2021-01-06 11:31:42,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 11:31:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 107 transitions. [2021-01-06 11:31:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 11:31:42,483 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:42,483 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:42,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:31:42,696 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:42,697 INFO L82 PathProgramCache]: Analyzing trace with hash 739293098, now seen corresponding path program 15 times [2021-01-06 11:31:42,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:42,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176586037] [2021-01-06 11:31:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:31:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:43,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176586037] [2021-01-06 11:31:43,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759728620] [2021-01-06 11:31:43,191 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 [2021-01-06 11:31:43,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 11:31:43,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:31:43,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 11:31:43,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:31:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:31:43,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:31:43,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 11:31:43,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839966265] [2021-01-06 11:31:43,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:31:43,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:31:43,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:31:43,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:31:43,828 INFO L87 Difference]: Start difference. First operand 79 states and 107 transitions. Second operand 19 states. [2021-01-06 11:31:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:31:44,124 INFO L93 Difference]: Finished difference Result 141 states and 197 transitions. [2021-01-06 11:31:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:31:44,125 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2021-01-06 11:31:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:31:44,126 INFO L225 Difference]: With dead ends: 141 [2021-01-06 11:31:44,126 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 11:31:44,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:31:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 11:31:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-01-06 11:31:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 11:31:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2021-01-06 11:31:44,130 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 32 [2021-01-06 11:31:44,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:31:44,131 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2021-01-06 11:31:44,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:31:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2021-01-06 11:31:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 11:31:44,132 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:31:44,132 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:31:44,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 11:31:44,338 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:31:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:31:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1209513521, now seen corresponding path program 16 times [2021-01-06 11:31:44,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:31:44,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814274779] [2021-01-06 11:31:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:31:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:31:44,497 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:31:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:31:44,739 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:31:44,804 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 11:31:44,805 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 11:31:44,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-01-06 11:31:44,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 11:31:44 BoogieIcfgContainer [2021-01-06 11:31:44,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 11:31:44,885 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 11:31:44,886 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 11:31:44,886 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 11:31:44,887 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:31:27" (3/4) ... [2021-01-06 11:31:44,891 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 11:31:44,891 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 11:31:44,893 INFO L168 Benchmark]: Toolchain (without parser) took 18837.30 ms. Allocated memory was 151.0 MB in the beginning and 336.6 MB in the end (delta: 185.6 MB). Free memory was 126.9 MB in the beginning and 289.2 MB in the end (delta: -162.3 MB). Peak memory consumption was 24.6 MB. Max. memory is 8.0 GB. [2021-01-06 11:31:44,894 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:31:44,894 INFO L168 Benchmark]: CACSL2BoogieTranslator took 419.08 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 115.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 11:31:44,895 INFO L168 Benchmark]: Boogie Procedure Inliner took 130.54 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 106.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 11:31:44,895 INFO L168 Benchmark]: Boogie Preprocessor took 132.79 ms. Allocated memory is still 151.0 MB. Free memory was 106.0 MB in the beginning and 98.8 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2021-01-06 11:31:44,896 INFO L168 Benchmark]: RCFGBuilder took 943.80 ms. Allocated memory is still 151.0 MB. Free memory was 98.8 MB in the beginning and 96.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-01-06 11:31:44,896 INFO L168 Benchmark]: TraceAbstraction took 17191.25 ms. Allocated memory was 151.0 MB in the beginning and 336.6 MB in the end (delta: 185.6 MB). Free memory was 95.6 MB in the beginning and 289.2 MB in the end (delta: -193.7 MB). Peak memory consumption was 140.3 MB. Max. memory is 8.0 GB. [2021-01-06 11:31:44,897 INFO L168 Benchmark]: Witness Printer took 5.64 ms. Allocated memory is still 336.6 MB. Free memory is still 289.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:31:44,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 419.08 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 115.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 130.54 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 106.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 132.79 ms. Allocated memory is still 151.0 MB. Free memory was 106.0 MB in the beginning and 98.8 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 943.80 ms. Allocated memory is still 151.0 MB. Free memory was 98.8 MB in the beginning and 96.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17191.25 ms. Allocated memory was 151.0 MB in the beginning and 336.6 MB in the end (delta: 185.6 MB). Free memory was 95.6 MB in the beginning and 289.2 MB in the end (delta: -193.7 MB). Peak memory consumption was 140.3 MB. Max. memory is 8.0 GB. * Witness Printer took 5.64 ms. Allocated memory is still 336.6 MB. Free memory is still 289.2 MB. There was no memory consumed. 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) [L16] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.0s, OverallIterations: 18, TraceHistogramMax: 16, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1065 SDtfs, 33 SDslu, 7788 SDs, 0 SdLazy, 1781 SolverSat, 129 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 531 GetRequests, 348 SyntacticMatches, 31 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=17, 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, 17 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 816 NumberOfCodeBlocks, 816 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 751 ConstructedInterpolants, 0 QuantifiedInterpolants, 59235 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1860 ConjunctsInSsa, 303 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 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...