/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/nla-digbench-scaling/divbin_unwindbound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:34:13,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:34:13,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:34:14,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:34:14,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:34:14,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:34:14,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:34:14,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:34:14,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:34:14,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:34:14,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:34:14,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:34:14,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:34:14,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:34:14,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:34:14,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:34:14,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:34:14,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:34:14,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:34:14,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:34:14,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:34:14,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:34:14,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:34:14,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:34:14,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:34:14,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:34:14,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:34:14,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:34:14,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:34:14,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:34:14,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:34:14,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:34:14,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:34:14,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:34:14,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:34:14,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:34:14,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:34:14,147 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:34:14,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:34:14,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:34:14,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:34:14,153 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:34:14,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:34:14,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:34:14,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:34:14,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:34:14,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:34:14,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:34:14,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:34:14,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:34:14,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:34:14,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:34:14,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:34:14,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:34:14,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:34:14,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:34:14,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:34:14,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:34:14,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:34:14,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:34:14,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:34:14,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:34:14,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:34:14,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:34:14,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:34:14,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:34:14,620 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:34:14,621 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:34:14,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2020-12-23 07:34:14,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bb0563fc8/45be9bbde5e04d7ea5a32319b7ecca40/FLAG23fc6c02c [2020-12-23 07:34:15,295 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:34:15,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2020-12-23 07:34:15,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bb0563fc8/45be9bbde5e04d7ea5a32319b7ecca40/FLAG23fc6c02c [2020-12-23 07:34:15,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bb0563fc8/45be9bbde5e04d7ea5a32319b7ecca40 [2020-12-23 07:34:15,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:34:15,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:34:15,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:34:15,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:34:15,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:34:15,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:34:15" (1/1) ... [2020-12-23 07:34:15,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e5afec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:15, skipping insertion in model container [2020-12-23 07:34:15,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:34:15" (1/1) ... [2020-12-23 07:34:15,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:34:15,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:34:15,936 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/nla-digbench-scaling/divbin_unwindbound20.i[950,963] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:34:15,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:34:15,971 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:34:15,987 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/nla-digbench-scaling/divbin_unwindbound20.i[950,963] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:34:15,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:34:16,021 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:34:16,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16 WrapperNode [2020-12-23 07:34:16,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:34:16,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:34:16,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:34:16,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:34:16,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (1/1) ... [2020-12-23 07:34:16,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (1/1) ... [2020-12-23 07:34:16,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:34:16,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:34:16,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:34:16,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:34:16,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (1/1) ... [2020-12-23 07:34:16,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (1/1) ... [2020-12-23 07:34:16,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (1/1) ... [2020-12-23 07:34:16,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (1/1) ... [2020-12-23 07:34:16,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (1/1) ... [2020-12-23 07:34:16,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (1/1) ... [2020-12-23 07:34:16,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (1/1) ... [2020-12-23 07:34:16,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:34:16,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:34:16,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:34:16,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:34:16,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:34:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:34:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:34:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:34:16,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:34:16,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:34:16,558 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 07:34:16,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:16 BoogieIcfgContainer [2020-12-23 07:34:16,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:34:16,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:34:16,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:34:16,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:34:16,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:34:15" (1/3) ... [2020-12-23 07:34:16,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5558fe58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:34:16, skipping insertion in model container [2020-12-23 07:34:16,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:16" (2/3) ... [2020-12-23 07:34:16,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5558fe58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:34:16, skipping insertion in model container [2020-12-23 07:34:16,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:16" (3/3) ... [2020-12-23 07:34:16,571 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.i [2020-12-23 07:34:16,579 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:34:16,584 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:34:16,607 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:34:16,638 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:34:16,638 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:34:16,638 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:34:16,638 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:34:16,638 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:34:16,639 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:34:16,639 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:34:16,639 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:34:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 07:34:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:34:16,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:16,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:16,670 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:16,677 INFO L82 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2020-12-23 07:34:16,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:16,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004218419] [2020-12-23 07:34:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:16,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004218419] [2020-12-23 07:34:16,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:16,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:34:16,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234243474] [2020-12-23 07:34:16,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:34:16,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:16,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:34:16,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:34:16,884 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-23 07:34:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:16,904 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2020-12-23 07:34:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:34:16,906 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 07:34:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:16,917 INFO L225 Difference]: With dead ends: 45 [2020-12-23 07:34:16,918 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 07:34:16,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:34:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 07:34:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 07:34:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:34:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-23 07:34:16,959 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2020-12-23 07:34:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:16,960 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-23 07:34:16,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:34:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-23 07:34:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:34:16,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:16,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:16,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:34:16,962 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:16,963 INFO L82 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2020-12-23 07:34:16,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:16,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296857587] [2020-12-23 07:34:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:16,987 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:16,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074688405] [2020-12-23 07:34:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:34:17,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:17,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296857587] [2020-12-23 07:34:17,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:17,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074688405] [2020-12-23 07:34:17,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:17,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:34:17,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570916363] [2020-12-23 07:34:17,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:34:17,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:17,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:34:17,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:34:17,203 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2020-12-23 07:34:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:17,238 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-23 07:34:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:34:17,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 07:34:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:17,240 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:34:17,240 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:34:17,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:34:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:34:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 07:34:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:34:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-23 07:34:17,246 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2020-12-23 07:34:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:17,246 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-23 07:34:17,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:34:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-23 07:34:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:34:17,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:17,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:17,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:34:17,463 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:17,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2020-12-23 07:34:17,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:17,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041589235] [2020-12-23 07:34:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:17,486 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:17,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175254143] [2020-12-23 07:34:17,487 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:34:17,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:17,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041589235] [2020-12-23 07:34:17,809 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:17,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175254143] [2020-12-23 07:34:17,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:17,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:34:17,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537090086] [2020-12-23 07:34:17,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:34:17,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:17,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:34:17,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:34:17,815 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-12-23 07:34:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:18,160 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-12-23 07:34:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:34:18,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 07:34:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:18,162 INFO L225 Difference]: With dead ends: 40 [2020-12-23 07:34:18,162 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:34:18,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:34:18,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:34:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-23 07:34:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 07:34:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-23 07:34:18,169 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2020-12-23 07:34:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:18,170 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-23 07:34:18,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:34:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-23 07:34:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:34:18,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:18,171 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:18,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:18,385 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:18,386 INFO L82 PathProgramCache]: Analyzing trace with hash 483460221, now seen corresponding path program 1 times [2020-12-23 07:34:18,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:18,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939793616] [2020-12-23 07:34:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:18,406 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:18,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125608340] [2020-12-23 07:34:18,407 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:34:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:18,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939793616] [2020-12-23 07:34:18,533 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:18,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125608340] [2020-12-23 07:34:18,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:18,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 07:34:18,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548634028] [2020-12-23 07:34:18,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:34:18,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:18,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:34:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:34:18,536 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-12-23 07:34:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:18,582 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-23 07:34:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:34:18,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 07:34:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:18,584 INFO L225 Difference]: With dead ends: 42 [2020-12-23 07:34:18,584 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:34:18,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:34:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 07:34:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:34:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-23 07:34:18,591 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2020-12-23 07:34:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:18,591 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-23 07:34:18,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:34:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-23 07:34:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:34:18,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:18,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:18,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:18,808 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:18,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:18,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2143807572, now seen corresponding path program 1 times [2020-12-23 07:34:18,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:18,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394337036] [2020-12-23 07:34:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:18,829 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:18,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752844374] [2020-12-23 07:34:18,829 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:18,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:34:18,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:19,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394337036] [2020-12-23 07:34:19,366 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:19,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752844374] [2020-12-23 07:34:19,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:19,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:34:19,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053536093] [2020-12-23 07:34:19,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:34:19,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:19,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:34:19,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:34:19,371 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 10 states. [2020-12-23 07:34:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:20,428 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-12-23 07:34:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:34:20,429 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-12-23 07:34:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:20,432 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:34:20,433 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 07:34:20,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:34:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 07:34:20,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2020-12-23 07:34:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:34:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-23 07:34:20,446 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 16 [2020-12-23 07:34:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:20,446 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-23 07:34:20,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:34:20,447 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-23 07:34:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:34:20,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:20,448 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:20,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:20,652 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash -681488537, now seen corresponding path program 1 times [2020-12-23 07:34:20,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:20,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135835955] [2020-12-23 07:34:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:20,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:20,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460753854] [2020-12-23 07:34:20,671 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:20,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:34:20,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:20,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135835955] [2020-12-23 07:34:20,745 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:20,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460753854] [2020-12-23 07:34:20,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:20,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:34:20,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112700776] [2020-12-23 07:34:20,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:34:20,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:20,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:34:20,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:34:20,748 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2020-12-23 07:34:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:20,792 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-12-23 07:34:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:34:20,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-23 07:34:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:20,795 INFO L225 Difference]: With dead ends: 50 [2020-12-23 07:34:20,795 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 07:34:20,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:34:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 07:34:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 07:34:20,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:34:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-23 07:34:20,801 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-12-23 07:34:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:20,801 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-23 07:34:20,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:34:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-23 07:34:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:34:20,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:20,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:21,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:34:21,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:21,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1690106195, now seen corresponding path program 1 times [2020-12-23 07:34:21,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:21,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609263592] [2020-12-23 07:34:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:21,036 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:21,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068814176] [2020-12-23 07:34:21,037 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:34:21,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:34:21,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609263592] [2020-12-23 07:34:21,233 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:21,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068814176] [2020-12-23 07:34:21,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:21,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:34:21,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22783228] [2020-12-23 07:34:21,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:34:21,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:21,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:34:21,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:21,236 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-12-23 07:34:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:21,356 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-23 07:34:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:34:21,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 07:34:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:21,358 INFO L225 Difference]: With dead ends: 46 [2020-12-23 07:34:21,358 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 07:34:21,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:34:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 07:34:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-12-23 07:34:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 07:34:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-23 07:34:21,364 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2020-12-23 07:34:21,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:21,365 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-23 07:34:21,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:34:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-23 07:34:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:34:21,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:21,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:21,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:21,573 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:21,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:21,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1038743540, now seen corresponding path program 2 times [2020-12-23 07:34:21,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:21,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146384184] [2020-12-23 07:34:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:21,590 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:21,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209399780] [2020-12-23 07:34:21,591 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:22,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:34:22,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:34:22,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:22,324 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:22,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146384184] [2020-12-23 07:34:22,422 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:22,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209399780] [2020-12-23 07:34:22,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:22,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:34:22,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155984777] [2020-12-23 07:34:22,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:34:22,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:22,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:34:22,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:34:22,425 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2020-12-23 07:34:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:22,732 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-12-23 07:34:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:34:22,733 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-23 07:34:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:22,733 INFO L225 Difference]: With dead ends: 68 [2020-12-23 07:34:22,734 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:34:22,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:34:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:34:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 07:34:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:34:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-12-23 07:34:22,739 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 26 [2020-12-23 07:34:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:22,740 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-12-23 07:34:22,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:34:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-12-23 07:34:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:34:22,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:22,741 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:22,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:22,947 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:22,948 INFO L82 PathProgramCache]: Analyzing trace with hash 346519601, now seen corresponding path program 1 times [2020-12-23 07:34:22,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:22,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125628982] [2020-12-23 07:34:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:22,989 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:22,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896736782] [2020-12-23 07:34:22,992 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:23,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:34:23,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 07:34:23,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125628982] [2020-12-23 07:34:23,094 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:23,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896736782] [2020-12-23 07:34:23,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:23,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:34:23,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119276107] [2020-12-23 07:34:23,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:34:23,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:23,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:34:23,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:23,097 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 6 states. [2020-12-23 07:34:23,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:23,140 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-12-23 07:34:23,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:34:23,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-23 07:34:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:23,142 INFO L225 Difference]: With dead ends: 57 [2020-12-23 07:34:23,142 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:34:23,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:34:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:34:23,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 07:34:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:34:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-23 07:34:23,148 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-12-23 07:34:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:23,148 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-23 07:34:23,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:34:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-23 07:34:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:34:23,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:23,150 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:23,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:34:23,363 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:23,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1597045256, now seen corresponding path program 3 times [2020-12-23 07:34:23,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:23,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680299442] [2020-12-23 07:34:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:23,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:23,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164351757] [2020-12-23 07:34:23,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:32,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:34:32,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:32,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 07:34:32,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:32,638 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-12-23 07:34:32,856 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-23 07:34:33,541 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-12-23 07:34:34,334 WARN L197 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-12-23 07:34:35,005 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:36,293 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:37,508 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:39,006 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:39,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680299442] [2020-12-23 07:34:39,057 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:39,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164351757] [2020-12-23 07:34:39,058 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-23 07:34:39,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:39,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:34:39,059 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:34:39,059 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:34:39,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:39,300 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:34:39,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:34:39 BoogieIcfgContainer [2020-12-23 07:34:39,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:34:39,301 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:34:39,301 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:34:39,301 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:34:39,302 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:16" (3/4) ... [2020-12-23 07:34:39,308 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:34:39,308 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:34:39,310 INFO L168 Benchmark]: Toolchain (without parser) took 23617.99 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 125.2 MB in the beginning and 113.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 80.3 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,310 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.1 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:34:39,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.03 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 115.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.70 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,324 INFO L168 Benchmark]: Boogie Preprocessor took 46.80 ms. Allocated memory is still 151.0 MB. Free memory was 113.5 MB in the beginning and 112.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,324 INFO L168 Benchmark]: RCFGBuilder took 422.19 ms. Allocated memory is still 151.0 MB. Free memory was 112.1 MB in the beginning and 97.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,327 INFO L168 Benchmark]: TraceAbstraction took 22738.28 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 97.5 MB in the beginning and 113.9 MB in the end (delta: -16.5 MB). Peak memory consumption was 101.3 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,328 INFO L168 Benchmark]: Witness Printer took 7.01 ms. Allocated memory is still 218.1 MB. Free memory was 113.9 MB in the beginning and 113.4 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,340 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.1 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 328.03 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 115.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 61.70 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.80 ms. Allocated memory is still 151.0 MB. Free memory was 113.5 MB in the beginning and 112.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 422.19 ms. Allocated memory is still 151.0 MB. Free memory was 112.1 MB in the beginning and 97.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22738.28 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 97.5 MB in the beginning and 113.9 MB in the end (delta: -16.5 MB). Peak memory consumption was 101.3 MB. Max. memory is 8.0 GB. * Witness Printer took 7.01 ms. Allocated memory is still 218.1 MB. Free memory was 113.9 MB in the beginning and 113.4 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L33] q = 0 [L34] r = A [L35] b = B [L36] EXPR counter++ [L36] COND TRUE counter++<20 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<20 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<20 [L37] COND TRUE !(r >= b) [L40] EXPR counter++ [L40] COND TRUE counter++<20 [L19] COND FALSE !(!(cond)) [L42] COND FALSE !(!(b != B)) [L43] q = 2 * q [L44] b = b / 2 [L45] COND TRUE r >= b [L46] q = q + 1 [L47] r = r - b [L40] EXPR counter++ [L40] COND TRUE counter++<20 [L19] COND FALSE !(!(cond)) [L42] COND FALSE !(!(b != B)) [L43] q = 2 * q [L44] b = b / 2 [L45] COND TRUE r >= b [L46] q = q + 1 [L47] r = r - b [L40] EXPR counter++ [L40] COND TRUE counter++<20 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 22.6s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 185 SDtfs, 359 SDslu, 316 SDs, 0 SdLazy, 299 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 33 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 151 ConstructedInterpolants, 0 QuantifiedInterpolants, 17515 SizeOfPredicates, 34 NumberOfNonLiveVariables, 685 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 24/46 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...