/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/array-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:05:49,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:05:49,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:05:49,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:05:49,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:05:49,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:05:49,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:05:49,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:05:49,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:05:49,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:05:49,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:05:49,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:05:49,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:05:49,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:05:49,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:05:49,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:05:49,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:05:49,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:05:49,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:05:49,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:05:49,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:05:49,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:05:49,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:05:49,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:05:49,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:05:49,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:05:49,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:05:49,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:05:49,588 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 10:05:49,661 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:05:49,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:05:49,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:05:49,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:05:49,666 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:05:49,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:05:49,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:05:49,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:05:49,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:05:49,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:05:49,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:05:49,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:05:49,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:05:49,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:05:49,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:05:49,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:05:49,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:05:49,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:05:49,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:05:49,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:05:49,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:05:49,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:05:49,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:05:49,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:05:49,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:05:49,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:05:50,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:05:50,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:05:50,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:05:50,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:05:50,176 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:05:50,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_monotonic.i [2021-01-06 10:05:50,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2e35f9e93/c20e2430dbb049d5900f2344354114fc/FLAGaeb532b06 [2021-01-06 10:05:50,890 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:05:50,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_monotonic.i [2021-01-06 10:05:50,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2e35f9e93/c20e2430dbb049d5900f2344354114fc/FLAGaeb532b06 [2021-01-06 10:05:51,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2e35f9e93/c20e2430dbb049d5900f2344354114fc [2021-01-06 10:05:51,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:05:51,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:05:51,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:05:51,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:05:51,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:05:51,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@459ba9f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51, skipping insertion in model container [2021-01-06 10:05:51,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:05:51,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:05:51,613 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/array-industry-pattern/array_monotonic.i[808,821] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:05:51,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:05:51,648 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:05:51,665 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/array-industry-pattern/array_monotonic.i[808,821] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:05:51,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:05:51,707 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:05:51,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51 WrapperNode [2021-01-06 10:05:51,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:05:51,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:05:51,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:05:51,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:05:51,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:05:51,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:05:51,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:05:51,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:05:51,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (1/1) ... [2021-01-06 10:05:51,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:05:51,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:05:51,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:05:51,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:05:51,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (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 10:05:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:05:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:05:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:05:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:05:51,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:05:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:05:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:05:52,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:05:52,155 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:05:52,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:05:52 BoogieIcfgContainer [2021-01-06 10:05:52,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:05:52,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:05:52,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:05:52,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:05:52,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:05:51" (1/3) ... [2021-01-06 10:05:52,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f7b929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:05:52, skipping insertion in model container [2021-01-06 10:05:52,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:51" (2/3) ... [2021-01-06 10:05:52,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f7b929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:05:52, skipping insertion in model container [2021-01-06 10:05:52,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:05:52" (3/3) ... [2021-01-06 10:05:52,228 INFO L111 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2021-01-06 10:05:52,246 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:05:52,257 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:05:52,297 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:05:52,383 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:05:52,384 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:05:52,384 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:05:52,384 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:05:52,384 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:05:52,384 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:05:52,385 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:05:52,385 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:05:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 10:05:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 10:05:52,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:52,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:52,448 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2021-01-06 10:05:52,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:52,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018928294] [2021-01-06 10:05:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:52,732 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 10:05:52,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018928294] [2021-01-06 10:05:52,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:05:52,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:05:52,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680850880] [2021-01-06 10:05:52,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:05:52,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:52,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:05:52,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:05:52,773 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 10:05:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:52,796 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-01-06 10:05:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:05:52,798 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 10:05:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:52,818 INFO L225 Difference]: With dead ends: 29 [2021-01-06 10:05:52,818 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 10:05:52,823 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 [2021-01-06 10:05:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 10:05:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 10:05:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 10:05:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 10:05:52,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-01-06 10:05:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:52,865 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 10:05:52,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:05:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 10:05:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 10:05:52,867 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:52,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:52,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:05:52,869 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2021-01-06 10:05:52,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:52,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277319837] [2021-01-06 10:05:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:52,934 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 10:05:52,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277319837] [2021-01-06 10:05:52,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:05:52,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:05:52,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913700495] [2021-01-06 10:05:52,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:05:52,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:52,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:05:52,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:05:52,939 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2021-01-06 10:05:52,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:52,995 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-01-06 10:05:52,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:05:52,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-01-06 10:05:52,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:52,997 INFO L225 Difference]: With dead ends: 31 [2021-01-06 10:05:52,997 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 10:05:52,999 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 10:05:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 10:05:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-01-06 10:05:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 10:05:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-01-06 10:05:53,004 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-01-06 10:05:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:53,005 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-01-06 10:05:53,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:05:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-01-06 10:05:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:05:53,006 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:53,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:53,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:05:53,007 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:53,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1819905507, now seen corresponding path program 1 times [2021-01-06 10:05:53,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:53,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449439392] [2021-01-06 10:05:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:53,061 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 10:05:53,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449439392] [2021-01-06 10:05:53,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181793227] [2021-01-06 10:05:53,062 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 10:05:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:53,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:05:53,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:53,201 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 10:05:53,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:53,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:05:53,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375690443] [2021-01-06 10:05:53,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:05:53,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:05:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:05:53,205 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 5 states. [2021-01-06 10:05:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:53,268 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-01-06 10:05:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:05:53,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 10:05:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:53,278 INFO L225 Difference]: With dead ends: 41 [2021-01-06 10:05:53,278 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:05:53,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:05:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:05:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 17. [2021-01-06 10:05:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:05:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 10:05:53,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-01-06 10:05:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:53,292 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 10:05:53,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:05:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 10:05:53,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:05:53,293 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:53,295 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:53,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:05:53,509 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:53,511 INFO L82 PathProgramCache]: Analyzing trace with hash -275681707, now seen corresponding path program 2 times [2021-01-06 10:05:53,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:53,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332581289] [2021-01-06 10:05:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:53,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332581289] [2021-01-06 10:05:53,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141428580] [2021-01-06 10:05:53,594 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 10:05:53,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:53,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:53,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:05:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:53,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:53,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:05:53,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966561728] [2021-01-06 10:05:53,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:05:53,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:05:53,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:05:53,702 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 6 states. [2021-01-06 10:05:53,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:53,765 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-01-06 10:05:53,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:05:53,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-01-06 10:05:53,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:53,767 INFO L225 Difference]: With dead ends: 51 [2021-01-06 10:05:53,768 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 10:05:53,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:05:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 10:05:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 20. [2021-01-06 10:05:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:05:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-01-06 10:05:53,775 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2021-01-06 10:05:53,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:53,775 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-01-06 10:05:53,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:05:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-01-06 10:05:53,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:05:53,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:53,777 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:53,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:53,992 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash 300836637, now seen corresponding path program 3 times [2021-01-06 10:05:53,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:53,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117992605] [2021-01-06 10:05:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:54,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117992605] [2021-01-06 10:05:54,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64928219] [2021-01-06 10:05:54,101 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 10:05:54,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:05:54,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:05:54,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:54,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:54,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:05:54,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792424288] [2021-01-06 10:05:54,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:05:54,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:05:54,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:05:54,223 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 7 states. [2021-01-06 10:05:54,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:54,315 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-01-06 10:05:54,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:05:54,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2021-01-06 10:05:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:54,317 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:05:54,317 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 10:05:54,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:05:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 10:05:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 23. [2021-01-06 10:05:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:05:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-01-06 10:05:54,325 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 17 [2021-01-06 10:05:54,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:54,325 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-01-06 10:05:54,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:05:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-01-06 10:05:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:05:54,326 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:54,326 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:54,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:54,541 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:54,542 INFO L82 PathProgramCache]: Analyzing trace with hash -215393963, now seen corresponding path program 4 times [2021-01-06 10:05:54,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:54,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391555579] [2021-01-06 10:05:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:54,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391555579] [2021-01-06 10:05:54,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602459246] [2021-01-06 10:05:54,653 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 10:05:54,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:05:54,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:54,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:05:54,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:54,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:54,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 10:05:54,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509984020] [2021-01-06 10:05:54,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:05:54,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:54,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:05:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:05:54,836 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 8 states. [2021-01-06 10:05:54,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:54,940 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2021-01-06 10:05:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:05:54,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2021-01-06 10:05:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:54,949 INFO L225 Difference]: With dead ends: 71 [2021-01-06 10:05:54,950 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 10:05:54,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:05:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 10:05:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 26. [2021-01-06 10:05:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:05:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-01-06 10:05:54,971 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 20 [2021-01-06 10:05:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:54,973 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-01-06 10:05:54,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:05:54,974 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-01-06 10:05:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:05:54,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:54,975 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:55,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:55,179 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1036688413, now seen corresponding path program 5 times [2021-01-06 10:05:55,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:55,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506482445] [2021-01-06 10:05:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:55,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506482445] [2021-01-06 10:05:55,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665529727] [2021-01-06 10:05:55,351 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 10:05:55,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:05:55,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:55,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:05:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:55,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:55,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:05:55,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444151947] [2021-01-06 10:05:55,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:05:55,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:05:55,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:05:55,554 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 9 states. [2021-01-06 10:05:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:55,642 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2021-01-06 10:05:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:05:55,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2021-01-06 10:05:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:55,644 INFO L225 Difference]: With dead ends: 81 [2021-01-06 10:05:55,644 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 10:05:55,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:05:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 10:05:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 29. [2021-01-06 10:05:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:05:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2021-01-06 10:05:55,657 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 23 [2021-01-06 10:05:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:55,658 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2021-01-06 10:05:55,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:05:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2021-01-06 10:05:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:05:55,660 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:55,661 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:55,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:05:55,877 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash 31786069, now seen corresponding path program 6 times [2021-01-06 10:05:55,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:55,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505561389] [2021-01-06 10:05:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:56,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505561389] [2021-01-06 10:05:56,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755843846] [2021-01-06 10:05:56,033 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 10:05:56,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:05:56,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:56,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:05:56,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:56,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:56,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:05:56,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032961653] [2021-01-06 10:05:56,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:05:56,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:05:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:05:56,225 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 10 states. [2021-01-06 10:05:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:56,333 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2021-01-06 10:05:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:05:56,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2021-01-06 10:05:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:56,334 INFO L225 Difference]: With dead ends: 91 [2021-01-06 10:05:56,335 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 10:05:56,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:05:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 10:05:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 32. [2021-01-06 10:05:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:05:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-01-06 10:05:56,340 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 26 [2021-01-06 10:05:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:56,341 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-01-06 10:05:56,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:05:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-01-06 10:05:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:05:56,342 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:56,342 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:56,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:56,552 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:56,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1091890915, now seen corresponding path program 7 times [2021-01-06 10:05:56,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:56,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037682645] [2021-01-06 10:05:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:56,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037682645] [2021-01-06 10:05:56,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680028942] [2021-01-06 10:05:56,669 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 10:05:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:56,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:05:56,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:56,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:56,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:05:56,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316698485] [2021-01-06 10:05:56,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:05:56,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:05:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:05:56,794 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 11 states. [2021-01-06 10:05:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:56,910 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2021-01-06 10:05:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:05:56,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2021-01-06 10:05:56,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:56,912 INFO L225 Difference]: With dead ends: 101 [2021-01-06 10:05:56,912 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:05:56,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:05:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:05:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 35. [2021-01-06 10:05:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 10:05:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-01-06 10:05:56,917 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 29 [2021-01-06 10:05:56,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:56,918 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-01-06 10:05:56,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:05:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-01-06 10:05:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:05:56,919 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:56,919 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:57,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:57,133 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:57,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1577816235, now seen corresponding path program 8 times [2021-01-06 10:05:57,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:57,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120203651] [2021-01-06 10:05:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:57,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120203651] [2021-01-06 10:05:57,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620886242] [2021-01-06 10:05:57,273 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 10:05:57,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:57,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:05:57,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:57,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:57,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:05:57,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848359199] [2021-01-06 10:05:57,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:05:57,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:57,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:05:57,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:05:57,457 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2021-01-06 10:05:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:57,583 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2021-01-06 10:05:57,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:05:57,584 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2021-01-06 10:05:57,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:57,585 INFO L225 Difference]: With dead ends: 111 [2021-01-06 10:05:57,585 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 10:05:57,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:05:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 10:05:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 38. [2021-01-06 10:05:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:05:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-01-06 10:05:57,600 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 32 [2021-01-06 10:05:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:57,601 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-01-06 10:05:57,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:05:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-01-06 10:05:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:05:57,606 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:57,606 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:57,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:05:57,820 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:57,821 INFO L82 PathProgramCache]: Analyzing trace with hash 555730461, now seen corresponding path program 9 times [2021-01-06 10:05:57,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:57,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98584430] [2021-01-06 10:05:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:57,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98584430] [2021-01-06 10:05:57,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24353117] [2021-01-06 10:05:57,986 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 10:05:58,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:05:58,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:58,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:05:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:58,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:58,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:05:58,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050274160] [2021-01-06 10:05:58,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:05:58,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:58,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:05:58,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:05:58,476 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand 13 states. [2021-01-06 10:05:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:58,603 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2021-01-06 10:05:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:05:58,604 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2021-01-06 10:05:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:58,605 INFO L225 Difference]: With dead ends: 121 [2021-01-06 10:05:58,606 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 10:05:58,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:05:58,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 10:05:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 41. [2021-01-06 10:05:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 10:05:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-01-06 10:05:58,611 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 35 [2021-01-06 10:05:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:58,611 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-01-06 10:05:58,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:05:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-01-06 10:05:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 10:05:58,612 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:58,613 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:58,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:58,827 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:58,828 INFO L82 PathProgramCache]: Analyzing trace with hash -175662507, now seen corresponding path program 10 times [2021-01-06 10:05:58,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:58,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807789884] [2021-01-06 10:05:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:58,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807789884] [2021-01-06 10:05:58,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153411036] [2021-01-06 10:05:58,985 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 10:05:59,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:05:59,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:59,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:05:59,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:59,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:59,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:05:59,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785676009] [2021-01-06 10:05:59,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:05:59,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:59,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:05:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:05:59,148 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 14 states. [2021-01-06 10:05:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:59,294 INFO L93 Difference]: Finished difference Result 131 states and 158 transitions. [2021-01-06 10:05:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:05:59,294 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2021-01-06 10:05:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:59,295 INFO L225 Difference]: With dead ends: 131 [2021-01-06 10:05:59,296 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 10:05:59,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:05:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 10:05:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 44. [2021-01-06 10:05:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:05:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2021-01-06 10:05:59,300 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 38 [2021-01-06 10:05:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:59,301 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2021-01-06 10:05:59,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:05:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2021-01-06 10:05:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:05:59,302 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:59,302 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:59,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:59,516 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:59,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:59,517 INFO L82 PathProgramCache]: Analyzing trace with hash -734479587, now seen corresponding path program 11 times [2021-01-06 10:05:59,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:59,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771960812] [2021-01-06 10:05:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:05:59,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771960812] [2021-01-06 10:05:59,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935944532] [2021-01-06 10:05:59,681 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 10:06:01,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 10:06:01,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:06:01,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:01,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:01,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:06:01,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198725593] [2021-01-06 10:06:01,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:06:01,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:01,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:06:01,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:06:01,230 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand 15 states. [2021-01-06 10:06:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:01,393 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2021-01-06 10:06:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:06:01,394 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2021-01-06 10:06:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:01,395 INFO L225 Difference]: With dead ends: 141 [2021-01-06 10:06:01,395 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 10:06:01,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:06:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 10:06:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 47. [2021-01-06 10:06:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 10:06:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-01-06 10:06:01,400 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 41 [2021-01-06 10:06:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:01,400 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-01-06 10:06:01,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:06:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-01-06 10:06:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 10:06:01,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:01,401 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:01,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:06:01,615 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:01,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:01,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1160870571, now seen corresponding path program 12 times [2021-01-06 10:06:01,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:01,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595386783] [2021-01-06 10:06:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:01,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595386783] [2021-01-06 10:06:01,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536633257] [2021-01-06 10:06:01,806 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 10:06:03,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:06:03,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:03,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:06:03,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:03,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:03,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:06:03,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891491475] [2021-01-06 10:06:03,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:06:03,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:06:03,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:06:03,190 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand 16 states. [2021-01-06 10:06:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:03,362 INFO L93 Difference]: Finished difference Result 151 states and 182 transitions. [2021-01-06 10:06:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:06:03,365 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2021-01-06 10:06:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:03,366 INFO L225 Difference]: With dead ends: 151 [2021-01-06 10:06:03,366 INFO L226 Difference]: Without dead ends: 143 [2021-01-06 10:06:03,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:06:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-01-06 10:06:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 50. [2021-01-06 10:06:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 10:06:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2021-01-06 10:06:03,373 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 44 [2021-01-06 10:06:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:03,374 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2021-01-06 10:06:03,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:06:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2021-01-06 10:06:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:06:03,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:03,375 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:03,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:06:03,586 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash 738586653, now seen corresponding path program 13 times [2021-01-06 10:06:03,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:03,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592514967] [2021-01-06 10:06:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:03,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592514967] [2021-01-06 10:06:03,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381706296] [2021-01-06 10:06:03,837 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 10:06:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:03,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:06:03,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:04,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:04,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:06:04,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961914048] [2021-01-06 10:06:04,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:06:04,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:04,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:06:04,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:06:04,024 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand 17 states. [2021-01-06 10:06:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:04,197 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2021-01-06 10:06:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:06:04,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2021-01-06 10:06:04,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:04,199 INFO L225 Difference]: With dead ends: 161 [2021-01-06 10:06:04,199 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 10:06:04,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:06:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 10:06:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 53. [2021-01-06 10:06:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:06:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2021-01-06 10:06:04,205 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 47 [2021-01-06 10:06:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:04,205 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2021-01-06 10:06:04,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:06:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2021-01-06 10:06:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 10:06:04,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:04,206 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:04,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:06:04,421 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:04,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:04,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1274622037, now seen corresponding path program 14 times [2021-01-06 10:06:04,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:04,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580575200] [2021-01-06 10:06:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:04,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580575200] [2021-01-06 10:06:04,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805473241] [2021-01-06 10:06:04,627 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 10:06:04,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:04,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:04,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:06:04,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:04,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:04,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:06:04,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962634485] [2021-01-06 10:06:04,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:06:04,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:04,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:06:04,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:06:04,786 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand 18 states. [2021-01-06 10:06:04,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:04,987 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2021-01-06 10:06:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:06:04,988 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2021-01-06 10:06:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:04,989 INFO L225 Difference]: With dead ends: 171 [2021-01-06 10:06:04,990 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 10:06:04,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:06:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 10:06:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 56. [2021-01-06 10:06:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:06:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2021-01-06 10:06:04,995 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 50 [2021-01-06 10:06:04,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:04,996 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2021-01-06 10:06:04,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:06:04,996 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2021-01-06 10:06:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 10:06:04,996 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:04,996 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:05,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:05,212 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:05,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1616340253, now seen corresponding path program 15 times [2021-01-06 10:06:05,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:05,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008549620] [2021-01-06 10:06:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:05,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008549620] [2021-01-06 10:06:05,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288177599] [2021-01-06 10:06:05,468 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 10:06:09,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 10:06:09,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:09,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:06:09,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:09,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:09,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:06:09,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213646976] [2021-01-06 10:06:09,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:06:09,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:09,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:06:09,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:06:09,751 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand 19 states. [2021-01-06 10:06:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:09,943 INFO L93 Difference]: Finished difference Result 181 states and 218 transitions. [2021-01-06 10:06:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:06:09,944 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2021-01-06 10:06:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:09,945 INFO L225 Difference]: With dead ends: 181 [2021-01-06 10:06:09,945 INFO L226 Difference]: Without dead ends: 173 [2021-01-06 10:06:09,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:06:09,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-01-06 10:06:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 59. [2021-01-06 10:06:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:06:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-01-06 10:06:09,952 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 53 [2021-01-06 10:06:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:09,952 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-01-06 10:06:09,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:06:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-01-06 10:06:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:06:09,953 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:09,953 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:10,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:06:10,154 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:10,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:10,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1623745707, now seen corresponding path program 16 times [2021-01-06 10:06:10,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:10,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488877973] [2021-01-06 10:06:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:10,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488877973] [2021-01-06 10:06:10,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638868267] [2021-01-06 10:06:10,421 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:10,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:06:10,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:06:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:10,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:10,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:06:10,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879719544] [2021-01-06 10:06:10,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:06:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:10,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:06:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:06:10,627 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand 20 states. [2021-01-06 10:06:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:10,852 INFO L93 Difference]: Finished difference Result 191 states and 230 transitions. [2021-01-06 10:06:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:06:10,853 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2021-01-06 10:06:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:10,854 INFO L225 Difference]: With dead ends: 191 [2021-01-06 10:06:10,854 INFO L226 Difference]: Without dead ends: 183 [2021-01-06 10:06:10,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:06:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-01-06 10:06:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 62. [2021-01-06 10:06:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 10:06:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2021-01-06 10:06:10,859 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 56 [2021-01-06 10:06:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:10,860 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2021-01-06 10:06:10,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:06:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2021-01-06 10:06:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:06:10,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:10,861 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:11,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:06:11,075 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:11,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1929569763, now seen corresponding path program 17 times [2021-01-06 10:06:11,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:11,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632855935] [2021-01-06 10:06:11,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:11,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632855935] [2021-01-06 10:06:11,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886654520] [2021-01-06 10:06:11,358 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:18,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 10:06:18,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:18,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:06:18,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:18,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:18,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 10:06:18,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907870816] [2021-01-06 10:06:18,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:06:18,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:18,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:06:18,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:06:18,651 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand 21 states. [2021-01-06 10:06:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:18,883 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2021-01-06 10:06:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:06:18,884 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2021-01-06 10:06:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:18,885 INFO L225 Difference]: With dead ends: 201 [2021-01-06 10:06:18,885 INFO L226 Difference]: Without dead ends: 193 [2021-01-06 10:06:18,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:06:18,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-01-06 10:06:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 65. [2021-01-06 10:06:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:06:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2021-01-06 10:06:18,891 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 59 [2021-01-06 10:06:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:18,891 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2021-01-06 10:06:18,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:06:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2021-01-06 10:06:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 10:06:18,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:18,892 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:19,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:19,093 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1186580053, now seen corresponding path program 18 times [2021-01-06 10:06:19,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:19,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742304156] [2021-01-06 10:06:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:19,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742304156] [2021-01-06 10:06:19,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716203707] [2021-01-06 10:06:19,454 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:30,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:06:30,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:30,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:06:30,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:31,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:31,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:06:31,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457971636] [2021-01-06 10:06:31,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:06:31,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:06:31,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:06:31,024 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand 22 states. [2021-01-06 10:06:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:31,261 INFO L93 Difference]: Finished difference Result 211 states and 254 transitions. [2021-01-06 10:06:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:06:31,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2021-01-06 10:06:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:31,263 INFO L225 Difference]: With dead ends: 211 [2021-01-06 10:06:31,264 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 10:06:31,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:06:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 10:06:31,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 68. [2021-01-06 10:06:31,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:06:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2021-01-06 10:06:31,269 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 62 [2021-01-06 10:06:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:31,269 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2021-01-06 10:06:31,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:06:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2021-01-06 10:06:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 10:06:31,270 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:31,270 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:31,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:31,486 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:31,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1312354531, now seen corresponding path program 19 times [2021-01-06 10:06:31,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:31,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990996759] [2021-01-06 10:06:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:31,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990996759] [2021-01-06 10:06:31,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469320321] [2021-01-06 10:06:31,869 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:31,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:06:31,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:32,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:32,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:06:32,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473668340] [2021-01-06 10:06:32,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:06:32,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:06:32,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:06:32,080 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand 23 states. [2021-01-06 10:06:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:32,326 INFO L93 Difference]: Finished difference Result 221 states and 266 transitions. [2021-01-06 10:06:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:06:32,327 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2021-01-06 10:06:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:32,329 INFO L225 Difference]: With dead ends: 221 [2021-01-06 10:06:32,329 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 10:06:32,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:06:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 10:06:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 71. [2021-01-06 10:06:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 10:06:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2021-01-06 10:06:32,335 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 65 [2021-01-06 10:06:32,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:32,335 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2021-01-06 10:06:32,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:06:32,336 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2021-01-06 10:06:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 10:06:32,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:32,339 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:32,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:32,555 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1890562389, now seen corresponding path program 20 times [2021-01-06 10:06:32,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:32,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029082559] [2021-01-06 10:06:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:32,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029082559] [2021-01-06 10:06:32,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423822563] [2021-01-06 10:06:32,913 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:33,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:33,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:06:33,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:33,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:33,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 10:06:33,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768932317] [2021-01-06 10:06:33,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:06:33,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:33,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:06:33,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:06:33,113 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 24 states. [2021-01-06 10:06:33,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:33,384 INFO L93 Difference]: Finished difference Result 231 states and 278 transitions. [2021-01-06 10:06:33,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:06:33,384 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2021-01-06 10:06:33,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:33,386 INFO L225 Difference]: With dead ends: 231 [2021-01-06 10:06:33,386 INFO L226 Difference]: Without dead ends: 223 [2021-01-06 10:06:33,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:06:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-01-06 10:06:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 74. [2021-01-06 10:06:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:06:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2021-01-06 10:06:33,391 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 68 [2021-01-06 10:06:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:33,391 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2021-01-06 10:06:33,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:06:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2021-01-06 10:06:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:06:33,392 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:33,392 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:33,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:06:33,607 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:33,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1299889123, now seen corresponding path program 21 times [2021-01-06 10:06:33,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:33,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275382916] [2021-01-06 10:06:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:34,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275382916] [2021-01-06 10:06:34,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819220393] [2021-01-06 10:06:34,023 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:50,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 10:06:50,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:50,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:06:50,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:50,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:50,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 10:06:50,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525944384] [2021-01-06 10:06:50,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:06:50,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:50,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:06:50,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:06:50,208 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand 25 states. [2021-01-06 10:06:50,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:50,466 INFO L93 Difference]: Finished difference Result 241 states and 290 transitions. [2021-01-06 10:06:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:06:50,467 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2021-01-06 10:06:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:50,469 INFO L225 Difference]: With dead ends: 241 [2021-01-06 10:06:50,469 INFO L226 Difference]: Without dead ends: 233 [2021-01-06 10:06:50,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:06:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-01-06 10:06:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 77. [2021-01-06 10:06:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 10:06:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2021-01-06 10:06:50,475 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 71 [2021-01-06 10:06:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:50,475 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2021-01-06 10:06:50,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:06:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2021-01-06 10:06:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 10:06:50,476 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:50,476 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:50,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:06:50,692 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash -414622635, now seen corresponding path program 22 times [2021-01-06 10:06:50,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:50,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608482383] [2021-01-06 10:06:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608482383] [2021-01-06 10:06:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464461332] [2021-01-06 10:06:51,118 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:51,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:06:51,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:51,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:06:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:51,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:51,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 10:06:51,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374005780] [2021-01-06 10:06:51,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:06:51,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:51,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:06:51,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:06:51,309 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand 26 states. [2021-01-06 10:06:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:51,609 INFO L93 Difference]: Finished difference Result 251 states and 302 transitions. [2021-01-06 10:06:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:06:51,609 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2021-01-06 10:06:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:51,611 INFO L225 Difference]: With dead ends: 251 [2021-01-06 10:06:51,611 INFO L226 Difference]: Without dead ends: 243 [2021-01-06 10:06:51,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:06:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-01-06 10:06:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 80. [2021-01-06 10:06:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:06:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2021-01-06 10:06:51,616 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 74 [2021-01-06 10:06:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:51,616 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2021-01-06 10:06:51,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:06:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2021-01-06 10:06:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 10:06:51,617 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:51,617 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:51,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:51,831 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:51,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1460123933, now seen corresponding path program 23 times [2021-01-06 10:06:51,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:51,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785473670] [2021-01-06 10:06:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:52,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785473670] [2021-01-06 10:06:52,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264444432] [2021-01-06 10:06:52,287 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:08:29,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 10:08:29,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:08:29,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:08:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:08:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:08:29,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:08:29,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 10:08:29,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225902835] [2021-01-06 10:08:29,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:08:29,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:08:29,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:08:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:08:29,335 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand 27 states. [2021-01-06 10:08:29,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:08:29,652 INFO L93 Difference]: Finished difference Result 261 states and 314 transitions. [2021-01-06 10:08:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:08:29,653 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2021-01-06 10:08:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:08:29,654 INFO L225 Difference]: With dead ends: 261 [2021-01-06 10:08:29,654 INFO L226 Difference]: Without dead ends: 253 [2021-01-06 10:08:29,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:08:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-01-06 10:08:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 83. [2021-01-06 10:08:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:08:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2021-01-06 10:08:29,659 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 77 [2021-01-06 10:08:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:08:29,659 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2021-01-06 10:08:29,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:08:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2021-01-06 10:08:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 10:08:29,660 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:08:29,660 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:08:29,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:08:29,872 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:08:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:08:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash 280414037, now seen corresponding path program 24 times [2021-01-06 10:08:29,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:08:29,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583926125] [2021-01-06 10:08:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:08:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:08:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:08:30,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583926125] [2021-01-06 10:08:30,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575385132] [2021-01-06 10:08:30,320 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:18,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 10:09:18,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:18,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:09:18,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:18,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:18,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:09:18,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601961447] [2021-01-06 10:09:18,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:09:18,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:18,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:09:18,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:09:18,485 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand 28 states. [2021-01-06 10:09:18,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:18,808 INFO L93 Difference]: Finished difference Result 271 states and 326 transitions. [2021-01-06 10:09:18,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:09:18,808 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2021-01-06 10:09:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:18,815 INFO L225 Difference]: With dead ends: 271 [2021-01-06 10:09:18,815 INFO L226 Difference]: Without dead ends: 263 [2021-01-06 10:09:18,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:09:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-01-06 10:09:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 86. [2021-01-06 10:09:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 10:09:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 113 transitions. [2021-01-06 10:09:18,819 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 113 transitions. Word has length 80 [2021-01-06 10:09:18,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:18,820 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 113 transitions. [2021-01-06 10:09:18,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:09:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 113 transitions. [2021-01-06 10:09:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 10:09:18,821 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:18,821 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:19,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:19,030 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:19,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1260285469, now seen corresponding path program 25 times [2021-01-06 10:09:19,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:19,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975109591] [2021-01-06 10:09:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:19,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975109591] [2021-01-06 10:09:19,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531779318] [2021-01-06 10:09:19,600 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:19,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:09:19,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:19,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:19,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:09:19,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399962849] [2021-01-06 10:09:19,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:09:19,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:19,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:09:19,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:09:19,839 INFO L87 Difference]: Start difference. First operand 86 states and 113 transitions. Second operand 29 states. [2021-01-06 10:09:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:20,207 INFO L93 Difference]: Finished difference Result 281 states and 338 transitions. [2021-01-06 10:09:20,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:09:20,208 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2021-01-06 10:09:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:20,209 INFO L225 Difference]: With dead ends: 281 [2021-01-06 10:09:20,210 INFO L226 Difference]: Without dead ends: 273 [2021-01-06 10:09:20,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:09:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-01-06 10:09:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 89. [2021-01-06 10:09:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 10:09:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2021-01-06 10:09:20,214 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 83 [2021-01-06 10:09:20,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:20,215 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2021-01-06 10:09:20,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:09:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2021-01-06 10:09:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:09:20,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:20,216 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:20,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:09:20,430 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:20,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:20,430 INFO L82 PathProgramCache]: Analyzing trace with hash -282594731, now seen corresponding path program 26 times [2021-01-06 10:09:20,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:20,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355029973] [2021-01-06 10:09:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:20,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355029973] [2021-01-06 10:09:20,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46544524] [2021-01-06 10:09:20,992 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:09:21,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:09:21,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:09:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:09:21,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:09:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:21,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:09:21,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 10:09:21,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122099412] [2021-01-06 10:09:21,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 10:09:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:09:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 10:09:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:09:21,283 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 30 states. [2021-01-06 10:09:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:09:21,661 INFO L93 Difference]: Finished difference Result 291 states and 350 transitions. [2021-01-06 10:09:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:09:21,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2021-01-06 10:09:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:09:21,664 INFO L225 Difference]: With dead ends: 291 [2021-01-06 10:09:21,664 INFO L226 Difference]: Without dead ends: 283 [2021-01-06 10:09:21,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 10:09:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-01-06 10:09:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 92. [2021-01-06 10:09:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:09:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-01-06 10:09:21,670 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 86 [2021-01-06 10:09:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:09:21,670 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-01-06 10:09:21,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 10:09:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-01-06 10:09:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:09:21,671 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:09:21,672 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:09:21,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:09:21,886 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:09:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:09:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash 513368861, now seen corresponding path program 27 times [2021-01-06 10:09:21,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:09:21,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143759557] [2021-01-06 10:09:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:09:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:09:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:09:22,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143759557] [2021-01-06 10:09:22,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417327138] [2021-01-06 10:09:22,432 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true